merge

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@6 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

Makefile

+# Main ffmpeg Makefile
+# (c) 2000, 2001 Gerard Lantau
+#
+include config.mk
+
+CFLAGS= -O2 -Wall -g -I./libavcodec -I./libav 
+LDFLAGS= -g 
+ifdef CONFIG_GPROF
+CFLAGS+=-p
+LDFLAGS+=-p
+endif
+
+PROG= ffmpeg ffserver
+
+all: lib $(PROG)
+
+lib:
+	make -C libavcodec all
+	make -C libav all
+
+ffmpeg: ffmpeg.o libav/libav.a libavcodec/libavcodec.a
+	gcc $(LDFLAGS) -o $@ $^ -lm
+
+ffserver: ffserver.o libav/libav.a libavcodec/libavcodec.a
+	gcc $(LDFLAGS) -o $@ $^ -lm
+
+%.o: %.c
+	gcc $(CFLAGS) -c -o $@ $< 
+
+install: all
+	install -s -m 755 $(PROG) $(PREFIX)/bin
+
+clean: 
+	make -C libavcodec clean
+	make -C libav clean
+	rm -f *.o *~ gmon.out TAGS $(PROG) 
+
+distclean: clean
+	rm -f Rules.mk config.h
+
+TAGS:
+	etags *.[ch] libav/*.[ch] libavcodec/*.[ch]

README

+FFmpeg - (c) 2000,2001 Gerard Lantau.
+
+1) Introduction
+---------------
+
+ffmpeg is a hyper fast realtime audio/video encoder, a streaming
+server and a generic audio and video file converter. 
+
+It can grab from a standard Video4Linux video source and convert it
+into several file formats based on DCT/motion compensation
+encoding. Sound is compressed in MPEG audio layer 2 or using an AC3
+compatible stream.
+
+What makes ffmpeg interesting ?
+
+- Innovative streaming technology : multiformat, real time encoding,
+  simple configuration.
+
+- Simple and efficient video encoder: outputs MPEG1, H263, Real
+  Video(tm), MPEG4, DIVX and MJPEG compatible bitstreams using the
+  same encoder core.
+
+- Real time encoding (25 fps in 352x288 on a K6 500) using the
+  video4linux API.
+
+- Generates I and P frames, which means it is far better than a MJPEG
+  encoder.
+
+- Hyper fast MPEG audio layer 2 compression (50 times faster than
+  realtime on a K6 500).
+
+- Hyper fast AC3 compatible encoder.
+
+- simple and very small portable C source code, easy to understand and
+  to modify. It be may the smallest decent MPEG encoder :-)
+
+- optional non real time higher quality encoding (different motion
+  estimators available).
+
+- Audio and Video decoders are in development.
+
+ffmpeg is made of two programs:
+
+* ffmpeg: soft VCR which encodes in real time to several formats. It
+  can also encode from any supported input file format to any input
+  supported format.
+
+* ffserver: high performance live broadcast streaming server based on
+  the ffmpeg core encoders.
+
+2) Documentation
+----------------
+
+* Read doc/ffmpeg.txt and doc/ffserver.txt to learn the basic features.
+
+* Read doc/TODO to know what are the know bugs and missing features.
+
+* Read doc/README.dev if you want to contribute or use the codec or
+  format libraries.
+
+3) Licensing:
+------------
+
+* See the file COPYING. ffmpeg and the associated library are licensed
+  under the GNU General Public License. I may change the license of
+  libavcodec and libav to LGPL if many people ask it (and if they
+  submit good patches!).
+
+* This code should be patent free since it is very simple. I took care
+  to use the same video encoder/decoder core for all formats to show
+  that they really ARE THE SAME except for the encoding huffman codes.
+
+Gerard Lantau (glantau@yahoo.fr).

doc/README.tech

+Technical notes:
+---------------
+
+Video:
+-----
+
+- The decision intra/predicted macroblock is the algorithm suggested
+  by the mpeg 1 specification.
+
+- only Huffman based H263 is supported, mainly because of patent
+  issues.
+
+- MPEG4 is supported, as an extension of the H263 encoder. MPEG4 DC
+  prediction is used, but not AC prediction. Specific VLC are used for
+  intra pictures. The output format is compatible with Open DIVX
+  version 47.
+
+- MJPEG is supported, but in the current version the huffman tables
+  are not optimized. It could be interesting to add this feature for
+  the flash format.
+
+- To increase speed, only motion vectors (0,0) are tested for real
+  time compression. NEW: now motion compensation is done with several
+  methods : none, full, log, and phods. The code is mmx/sse optimized.
+
+- In high quality mode, full search is used for motion
+  vectors. Currently, only fcode = 1 is used for both H263/MPEG1. Half
+  pel vectors are used.
+
+I also plan to improve the bitrate control which is too simplistic.
+
+Audio:
+-----
+
+- I rewrote the mpeg audio layer 2 compatible encoder from scratch. It
+  is one of the simplest encoder you can imagine (800 lines of C code
+  !). It is also one of the fastest because of its simplicity. There
+  are still some problems of overflow. A minimal psycho acoustic model
+  could be added. Currently, stereo is supported, but not joint
+  stereo.
+
+- I rewrote the AC3 audio encoder from scratch. It is fairly naive,
+  but the result are quiet interesting at 64 kbit/s. It includes
+  extensions for low sampling rates used in some Internet
+  formats. Differential and coupled stereo is not handled. Stereo
+  channels are simply handled as two mono channels.

doc/TODO

+ffmpeg TODO list:
+----------------
+
+(in approximate decreasing priority order)
+
+Planned in next release:
+
+(DONE) - apply header fixes
+(DONE) - mpeg audio decoder.
+(DONE) - fix decode/encode codec string.
+(DONE) - fix EINTR error if VIDIOCSYNC.
+(DONE) - add CONFIG system. 
+(DONE) - merge mplayer mmx accel.
+(DONE) - fix emms bug.
+(DONE) - add I263 handling
+(DONE) - add RV10 decoding.
+(DONE) - add true pgm support.
+(DONE) - msmpeg4 0x18 fix.
+- add qscale out.
+- add format autodetect with content (for example to distinguish
+  mpegvideo/mpegmux).
+- add external alloc for libavcodec (avifile request).
+- fix -sameq in grabbing
+- find a solution to clear feed1.ffm if format change.
+- new grab architecture : use avformat instead of audio: and video:
+  protocol.
+- correct PTS handling to sync audio and video.
+- fix 0 size picture in AVIs = skip picture
+
+BUGS:
+
+- fix audio/video synchro (including real player synchro bugs)
+
+- Improve the bit rate control for video codecs.
+
+- see ov511.o YUV problem (420 instead of 420P).
+
+- fix file caching pb in windows (add correct headers)
+
+- add low pass filter to suppress noise coming from cheap TV cards.
+
+- test/debug audio in flash format
+
+- sort out ASF streaming pbs.
+
+- Improve psycho acoustic model for AC3 & mpeg audio.
+
+FEATURES:
+
+- add MPEG4 in mpegmux support.
+
+- add RTP / multicast layer.
+
+- demux streams for CCTV : N streams in one stream. Add option to
+  generate multiple streams.
+
+- add disconnect user option in stat.html.
+
+- deny & allow + password in ffserver.
+
+- graphical user interface.
+
+- animated gif as output format

doc/ffmpeg.txt

+*************** FFMPEG soft VCR documentation *****************
+
+0) Introduction
+---------------
+
+  FFmpeg is a very fast video and audio encoder. It can grab from
+  files or from a live audio/video source. 
+  
+  The command line interface is designed to be intuitive, in the sense
+  that ffmpeg tries to figure out all the paramters, when
+  possible. You have usually to give only the target bitrate you want.
+
+  FFmpeg can also convert from any sample rate to any other, and
+  resize video on the fly with a high quality polyphase filter.
+
+1) Video and Audio grabbing
+---------------------------
+
+* ffmpeg can use a video4linux compatible video source and any Open
+  Sound System audio source:
+
+  ffmpeg /tmp/out.mpg 
+
+  Note that you must activate the right video source and channel
+  before launching ffmpeg. You can use any TV viewer such as xawtv by
+  Gerd Knorr which I find very good. You must also set correctly the
+  audio recording levels with a standard mixer.
+
+2) Video and Audio file format convertion
+-----------------------------------------
+
+* ffmpeg can use any supported file format and protocol as input : 
+
+examples:
+
+  ffmpeg -i /tmp/test%d.Y /tmp/out.mpg 
+
+If will use the files: 
+/tmp/test0.Y, /tmp/test0.U, /tmp/test0.V, 
+/tmp/test1.Y, /tmp/test1.U, /tmp/test1.V, etc...
+
+The Y files use twice the resolution of the U and V files. They are
+raw files, without header. They can be generated by all decent video
+decoders. You must specify the size of the image with the '-s' option
+if ffmpeg cannot guess it.
+
+* You can set several input files and output files:
+
+  ffmpeg -i /tmp/a.wav -s 640x480 -i /tmp/a.yuv /tmp/a.mpg
+
+Convert the audio file a.wav and the raw yuv video file a.yuv  to mpeg file a.mpg
+
+* you can also do audio and video convertions at the same time:
+
+  ffmpeg -i /tmp/a.wav -ar 22050 /tmp/a.mp2
+
+Convert the sample rate of a.wav to 22050 Hz and encode it to MPEG audio.
+
+* you can encode to several formats at the same time and define a
+  mapping from input stream to output streams:
+
+  ffmpeg -i /tmp/a.wav -ab 64 /tmp/a.mp2 -ab 128 /tmp/b.mp2 -map 0:0 -map 0:0
+
+  convert a.wav to a.mp2 at 64 kbits and b.mp2 at 128 kbits. '-map
+  file:index' specify which input stream is used for each output
+  stream, in the order of the definition of output streams.
+
+NOTE: to see the supported input formats, use 'ffmpeg -formats'.
+
+2) Invocation
+-------------
+
+* The generic syntax is :
+
+  ffmpeg [[options][-i input_file]]... {[options] output_file}...
+
+  If no input file is given, audio/video grabbing is done.
+
+  As a general rule, options are applied to the next specified
+  file. For example, if you give the '-b 64' option, it sets the video
+  bitrate of the next file. Format option may be needed for raw input
+  files.
+
+  By default, ffmpeg tries to convert as losslessly as possible: it
+  uses the same audio and video parameter fors the outputs as the one
+  specified for the inputs.
+
+* Main options are:
+
+-h                  show help
+-formats            show available formats, codecs and protocols
+-L                  print the LICENSE
+-i filename         input file name
+-y                  overwrite output files
+-t duration         set recording time in seconds
+-f format           set encoding format                  [guessed]
+-title string       set the title
+-author string      set the author
+-copyright string   set the copyright
+-comment string     set the comment
+
+* Video Options are:
+
+-s size      set frame size                       [160x128]
+-r fps       set frame rate                       [25]
+-b bitrate   set the video bitrate in kbit/s      [200]
+-vn          disable video recording              [no]
+
+* Audio Options are:
+
+-ar freq     set the audio sampling freq          [44100]
+-ab bitrate  set the audio bitrate in kbit/s      [64]
+-ac channels set the number of audio channels     [1]
+-an          disable audio recording              [no]
+
+Advanced options are:
+
+-map file:stream    set input stream mapping
+-g gop_size         set the group of picture size        [12]
+-intra              use only intra frames                [no]
+-qscale q           use fixed video quantiser scale (VBR)
+-c comment          set the comment string
+-vd device          set video4linux device name          [/dev/video]
+-vcodec codec       force audio codec
+-me method          set motion estimation method
+-ad device          set audio device name                [/dev/dsp]
+-acodec codec       force audio codec
+
+The output file can be "-" to output to a pipe. This is only possible
+with mpeg1 and h263 formats. 
+
+3) Protocols
+
+ ffmpeg handles also many protocols specified with the URL syntax.
+
+ Use 'ffmpeg -formats' to have a list of the supported protocols.
+
+ The protocol 'http:' is currently used only to communicate with
+ ffserver (see the ffserver documentation). When ffmpeg will be a
+ video player it will also be used for streaming :-)
+
+4) File formats and codecs
+--------------------------
+
+ Use 'ffmpeg -formats' to have a list of the supported output
+ formats. Only some formats are handled as input, but it will improve
+ in the next versions.
+
+5) Tips
+-------
+
+- For streaming at very low bit rate application, use a low frame rate
+  and a small gop size. This is especially true for real video where
+  the Linux player does not seem to be very fast, so it can miss
+  frames. An example is:
+
+  ffmpeg -g 3 -r 3 -t 10 -b 50 -s qcif -f rv10 /tmp/b.rm
+
+- The parameter 'q' which is displayed while encoding is the current
+  quantizer. The value of 1 indicates that a very good quality could
+  be achieved. The value of 31 indicates the worst quality. If q=31
+  too often, it means that the encoder cannot compress enough to meet
+  your bit rate. You must either increase the bit rate, decrease the
+  frame rate or decrease the frame size.
+
+- If your computer is not fast enough, you can speed up the
+  compression at the expense of the compression ratio. You can use
+  '-me zero' to speed up motion estimation, and '-intra' to disable
+  completly motion estimation (you have only I frames, which means it
+  is about as good as JPEG compression).
+
+- To have very low bitrates in audio, reduce the sampling frequency
+  (down to 22050 kHz for mpeg audio, 22050 or 11025 for ac3).
+
+- To have a constant quality (but a variable bitrate), use the option
+  '-qscale n' when 'n' is between 1 (excellent quality) and 31 (worst
+  quality).
+
+- When converting video files, you can use the '-sameq' option which
+  uses in the encoder the same quality factor than in the decoder. It
+  allows to be almost lossless in encoding.

doc/ffserver.conf

+# Port on which the server is listening. You must select a different
+# port from your standard http web server if it is running on the same
+# computer.
+
+Port 8090
+
+# Address on which the server is bound. Only useful if you have
+# several network interfaces.
+
+BindAddress 0.0.0.0
+
+# Number of simultaneous requests that can be handled. Since FFServer
+# is very fast, this limit is determined mainly by your Internet
+# connection speed.
+
+MaxClients 1000
+
+# Access Log file (uses standard Apache log file format)
+# '-' is the standard output
+
+CustomLog -
+
+##################################################################
+# Definition of the live feeds. Each live feed contains one video
+# and/or audio sequence coming from an ffmpeg encoder or another
+# ffserver. This sequence may be encoded simultaneously with several
+# codecs at several resolutions.
+
+<Feed feed1.ffm>
+
+# You must use 'ffmpeg' to send a live feed to ffserver. In this
+# example, you can type:
+# 
+# ffmpeg http://localhost:8090/feed1.ffm
+
+# ffserver can also do time shifting. It means that it can stream any
+# previously recorded live stream. The request should contain:
+# "http://xxxx?date=[YYYY-MM-DDT][[HH:]MM:]SS[.m...]".You must specify
+# a path where the feed is stored on disk. You also specify the
+# maximum size of the feed (100M bytes here). Default:
+# File=/tmp/feed_name.ffm FileMaxSize=5M
+
+File /tmp/feed1.ffm
+FileMaxSize 50M
+
+</Feed>
+
+##################################################################
+# Now you can define each stream which will be generated from the
+# original audio and video stream. Each format has a filename (here
+# 'test128.mpg'). FFServer will send this stream when answering a
+# request containing this filename.
+
+<Stream test1.mpg>
+
+# coming from live feed 'feed1'
+Feed feed1.ffm
+
+# Format of the stream : you can choose among:
+# mpeg       : MPEG1 multiplexed video and audio
+# mpegvideo  : only MPEG1 video
+# mp2        : MPEG audio layer 2
+# mp3        : MPEG audio layer 3 (currently sent as layer 2)
+# rm         : Real Networks compatible stream. Multiplexed audio and video.
+# ra         : Real Networks compatible stream. Audio only.
+# mpjpeg     : Multipart JPEG (works with Netscape without any plugin)
+# jpeg       : Generate a single JPEG image.
+# asf        : ASF compatible stream (Windows Media Player format). Not finished yet.
+# swf        : Macromedia flash(tm) compatible stream
+# avi        : AVI format (open divx video, mpeg audio sound)
+# master     : special ffmpeg stream used to duplicate a server
+
+Format mpeg
+
+# Bitrate for the audio stream. Codecs usually support only a few different bitrates. 
+
+AudioBitRate 32
+
+# Number of audio channels : 1 = mono, 2 = stereo
+
+AudioChannels 1
+
+# Sampling frequency for audio. When using low bitrates, you should
+# lower this frequency to 22050 or 11025. The supported frequencies
+# depend on the selected audio codec.
+
+AudioSampleRate 44100
+
+# Bitrate for the video stream.
+VideoBitRate 64
+
+# Number of frames per second
+VideoFrameRate 3
+
+# Size of the video frame : WxH (default: 160x128)
+# W : width, H : height
+# The following abbreviation are defined : sqcif, qcif, cif, 4cif
+VideoSize    160x128
+
+# transmit only intra frames (useful for low bitrates) 
+VideoIntraOnly
+
+# If non intra only, an intra frame is transmitted every VideoGopSize
+# frames Video synchronization can only begin at an I frames.
+#VideoGopSize 12
+
+# Suppress audio
+#NoAudio
+
+# Suppress video
+#NoVideo
+
+</Stream>
+
+# second mpeg stream with high frame rate
+
+<Stream test2.mpg>
+Feed feed1.ffm
+Format mpegvideo
+VideoBitRate 128
+VideoFrameRate 25
+#VideoSize    352x240
+VideoGopSize 25
+</Stream>
+
+##################################################################
+# A stream coming from a file : you only need to set the input
+# filename and optionnally a new format. Supported conversions:
+#    avi -> asf
+#
+
+<Stream file.asf>
+
+#File "/tmp/file.avi"
+File "tmp/file.avi"
+# avi must be converted to asf to be streamed
+Format asf
+
+</Stream>
+
+# another file streaming
+<Stream file.mp3>
+
+File "tmp/file.mp3"
+
+</Stream>
+
+##################################################################
+# Another stream : Real with audio only at 32 kbits
+
+<Stream test.ra>
+
+Feed feed1.ffm
+Format rm
+AudioBitRate 32
+NoVideo
+
+</Stream>
+
+##################################################################
+# Another stream : Real with audio and video at 64 kbits
+
+<Stream test.rm>
+
+Feed feed1.ffm
+Format rm
+
+AudioBitRate 32
+VideoBitRate 20
+VideoFrameRate 2
+VideoIntraOnly
+
+</Stream>
+
+##################################################################
+# Another stream : Mpeg audio layer 2 at 64 kbits.
+
+<Stream test.mp2>
+
+Feed feed1.ffm
+Format mp2
+AudioBitRate 64
+AudioSampleRate 44100
+
+</Stream>
+
+<Stream test1.mp2>
+
+Feed feed1.ffm
+Format mp2
+AudioBitRate 32
+AudioSampleRate 16000
+
+</Stream>
+
+##################################################################
+# Another stream : Multipart JPEG
+
+<Stream test.mjpg>
+
+Feed feed1.ffm
+Format mpjpeg
+
+VideoFrameRate 2
+VideoIntraOnly
+
+</Stream>
+
+##################################################################
+# Another stream : Multipart JPEG
+
+<Stream test.jpg>
+
+Feed feed1.ffm
+Format jpeg
+
+# the parameters are choose here to take the same output as the
+# Multipart JPEG one.
+VideoFrameRate 2 
+VideoIntraOnly
+#VideoSize 352x240
+
+</Stream>
+
+##################################################################
+# Another stream : Flash
+
+<Stream test.swf>
+
+Feed feed1.ffm
+Format swf
+
+VideoFrameRate 2
+VideoIntraOnly
+
+</Stream>
+
+
+##################################################################
+# Another stream : ASF compatible
+
+<Stream test.asf>
+
+Feed feed1.ffm
+Format asf
+
+AudioBitRate 64
+AudioSampleRate 44100
+VideoFrameRate 2
+VideoIntraOnly
+
+</Stream>
+
+##################################################################
+# Special stream : server status
+
+<Stream stat.html>
+
+Format status
+
+</Stream>

ffmpeg.c

+/*
+ * FFmpeg main 
+ * Copyright (c) 2000,2001 Gerard Lantau
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <errno.h>
+#include <sys/time.h>
+#include <string.h>
+#include <sys/poll.h>
+#include <termios.h>
+#include <ctype.h>
+
+#include "avformat.h"
+
+typedef struct {
+    const char *name;
+    int flags;
+#define HAS_ARG    0x0001
+#define OPT_BOOL   0x0002
+#define OPT_EXPERT 0x0004
+#define OPT_STRING 0x0008
+    union {
+        void (*func_arg)();
+        int *int_arg;
+        char **str_arg;
+    } u;
+    const char *help;
+    const char *argname;
+} OptionDef;
+
+/* select an input stream for an output stream */
+typedef struct AVStreamMap {
+    int file_index;
+    int stream_index;
+} AVStreamMap;
+
+extern const OptionDef options[];
+
+void show_help(void);
+
+#define MAX_FILES 20
+
+static AVFormatContext *input_files[MAX_FILES];
+static int nb_input_files = 0;
+
+static AVFormatContext *output_files[MAX_FILES];
+static int nb_output_files = 0;
+
+static AVStreamMap stream_maps[MAX_FILES];
+static int nb_stream_maps;
+
+static AVFormat *file_format;
+static int frame_width  = 160;
+static int frame_height = 128;
+static int frame_rate = 25 * FRAME_RATE_BASE;
+static int video_bit_rate = 200000;
+static int video_qscale = 0;
+static int video_disable = 0;
+static int video_codec_id = CODEC_ID_NONE;
+static int same_quality = 0;
+
+static int gop_size = 12;
+static int intra_only = 0;
+static int audio_sample_rate = 44100;
+static int audio_bit_rate = 64000;
+static int audio_disable = 0;
+static int audio_channels = 1;
+static int audio_codec_id = CODEC_ID_NONE;
+
+static INT64 recording_time = 0;
+static int file_overwrite = 0;
+static char *str_title = NULL;
+static char *str_author = NULL;
+static char *str_copyright = NULL;
+static char *str_comment = NULL;
+
+typedef struct AVOutputStream {
+    int file_index;          /* file index */
+    int index;               /* stream index in the output file */
+    int source_index;        /* AVInputStream index */
+    AVStream *st;            /* stream in the output file */
+    int encoding_needed;   /* true if encoding needed for this stream */
+
+    int fifo_packet_rptr;    /* read index in the corresponding
+                                avinputstream packet fifo */
+    /* video only */
+    AVPicture pict_tmp;         /* temporary image for resizing */
+    int video_resample;
+    ImgReSampleContext *img_resample_ctx; /* for image resampling */
+    
+    /* audio only */
+    int audio_resample;
+    ReSampleContext *resample; /* for audio resampling */
+    FifoBuffer fifo;     /* for compression: one audio fifo per codec */
+} AVOutputStream;
+
+typedef struct AVInputStream {
+    int file_index;
+    int index;
+    AVStream *st;
+    int discard;             /* true if stream data should be discarded */
+    int decoding_needed;     /* true if the packets must be decoded in 'raw_fifo' */
+    INT64 pts;               /* current pts */
+    int frame_number;        /* current frame */
+    INT64 sample_index;      /* current sample */
+} AVInputStream;
+
+typedef struct AVInputFile {
+    int eof_reached;      /* true if eof reached */
+    int ist_index;        /* index of first stream in ist_table */
+    int buffer_size;      /* current total buffer size */
+    int buffer_size_max;  /* buffer size at which we consider we can stop
+                             buffering */
+} AVInputFile;
+
+/* init terminal so that we can grab keys */
+static struct termios oldtty;
+
+static void term_exit(void)
+{
+    tcsetattr (0, TCSANOW, &oldtty);
+}
+
+static void term_init(void)
+{
+    struct termios tty;
+
+    tcgetattr (0, &tty);
+    oldtty = tty;
+
+    tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
+                          |INLCR|IGNCR|ICRNL|IXON);
+    tty.c_oflag |= OPOST;
+    tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
+    tty.c_cflag &= ~(CSIZE|PARENB);
+    tty.c_cflag |= CS8;
+    tty.c_cc[VMIN] = 1;
+    tty.c_cc[VTIME] = 0;
+    
+    tcsetattr (0, TCSANOW, &tty);
+
+    atexit(term_exit);
+}
+
+/* read a key without blocking */
+static int read_key(void)
+{
+    struct timeval tv;
+    int n;
+    unsigned char ch;
+    fd_set rfds;
+
+    FD_ZERO(&rfds);
+    FD_SET(0, &rfds);
+    tv.tv_sec = 0;
+    tv.tv_usec = 0;
+    n = select(1, &rfds, NULL, NULL, &tv);
+    if (n > 0) {
+        if (read(0, &ch, 1) == 1)
+            return ch;
+    }
+    return -1;
+}
+
+#define AUDIO_FIFO_SIZE 8192
+
+/* main loop for grabbing */
+int av_grab(AVFormatContext *s)
+{
+    UINT8 audio_buf[AUDIO_FIFO_SIZE/2];
+    UINT8 audio_buf1[AUDIO_FIFO_SIZE/2];
+    UINT8 audio_out[AUDIO_FIFO_SIZE/2];
+    UINT8 video_buffer[128*1024];
+    char buf[256];
+    short *samples;
+    URLContext *audio_handle = NULL, *video_handle = NULL;
+    int ret;
+    AVCodecContext *enc, *first_video_enc = NULL;
+    int frame_size, frame_bytes;
+    int use_audio, use_video;
+    int frame_rate, sample_rate, channels;
+    int width, height, frame_number, i, pix_fmt = 0;
+    AVOutputStream *ost_table[s->nb_streams], *ost;
+    UINT8 *picture_in_buf = NULL, *picture_420p = NULL;
+    int audio_fifo_size = 0, picture_size = 0;
+    INT64 time_start;
+
+    /* init output stream info */
+    for(i=0;i<s->nb_streams;i++)
+        ost_table[i] = NULL;
+
+    /* output stream init */
+    for(i=0;i<s->nb_streams;i++) {
+        ost = av_mallocz(sizeof(AVOutputStream));
+        if (!ost)
+            goto fail;
+        ost->index = i;
+        ost->st = s->streams[i];
+        ost_table[i] = ost;
+    }
+
+    use_audio = 0;
+    use_video = 0;
+    frame_rate = 0;
+    sample_rate = 0;
+    frame_size = 0;
+    channels = 1;
+    width = 0;
+    height = 0;
+    frame_number = 0;
+    
+    for(i=0;i<s->nb_streams;i++) {
+        AVCodec *codec;
+
+        ost = ost_table[i];
+        enc = &ost->st->codec;
+        codec = avcodec_find_encoder(enc->codec_id);
+        if (!codec) {
+            fprintf(stderr, "Unknown codec\n");
+            return -1;
+        }
+        if (avcodec_open(enc, codec) < 0) {
+            fprintf(stderr, "Incorrect encode parameters\n");
+            return -1;
+        }
+        switch(enc->codec_type) {
+        case CODEC_TYPE_AUDIO:
+            use_audio = 1;
+            if (enc->sample_rate > sample_rate)
+                sample_rate = enc->sample_rate;
+            if (enc->frame_size > frame_size)
+                frame_size = enc->frame_size;
+            if (enc->channels > channels)
+                channels = enc->channels;
+            break;
+        case CODEC_TYPE_VIDEO:
+            if (!first_video_enc)
+                first_video_enc = enc;
+            use_video = 1;
+            if (enc->frame_rate > frame_rate)
+                frame_rate = enc->frame_rate;
+            if (enc->width > width)
+                width = enc->width;
+            if (enc->height > height)
+                height = enc->height;
+            break;
+        }
+    }
+
+    /* audio */
+    samples = NULL;
+    if (use_audio) {
+        snprintf(buf, sizeof(buf), "audio:%d,%d", sample_rate, channels);
+        ret = url_open(&audio_handle, buf, URL_RDONLY);
+        if (ret < 0) {
+            fprintf(stderr, "Could not open audio device: disabling audio capture\n");
+            use_audio = 0;
+        } else {
+            URLFormat f;
+            /* read back exact grab parameters */
+            if (url_getformat(audio_handle, &f) < 0) {
+                fprintf(stderr, "could not read back video grab parameters\n");
+                goto fail;
+            }
+            sample_rate = f.sample_rate;
+            channels = f.channels;
+            audio_fifo_size = ((AUDIO_FIFO_SIZE / 2) / audio_handle->packet_size) * 
+                audio_handle->packet_size;
+            fprintf(stderr, "Audio sampling: %d Hz, %s\n", 
+                    sample_rate, channels == 2 ? "stereo" : "mono");
+        }
+    }
+    
+    /* video */
+    if (use_video) {
+        snprintf(buf, sizeof(buf), "video:%d,%d,%f", 
+                 width, height, (float)frame_rate / FRAME_RATE_BASE);
+
+        ret = url_open(&video_handle, buf, URL_RDONLY);
+        if (ret < 0) {
+            fprintf(stderr,"Could not init video 4 linux capture: disabling video capture\n");
+            use_video = 0;
+        } else {
+            URLFormat f;
+            const char *pix_fmt_str;
+            /* read back exact grab parameters */
+            if (url_getformat(video_handle, &f) < 0) {
+                fprintf(stderr, "could not read back video grab parameters\n");
+                goto fail;
+            }
+            width = f.width;
+            height = f.height;
+            pix_fmt = f.pix_fmt;
+            switch(pix_fmt) {
+            case PIX_FMT_YUV420P:
+                pix_fmt_str = "420P";
+                break;
+            case PIX_FMT_YUV422:
+                pix_fmt_str = "422";
+                break;
+            case PIX_FMT_RGB24:
+                pix_fmt_str = "RGB24";
+                break;
+            case PIX_FMT_BGR24:
+                pix_fmt_str = "BGR24";
+                break;
+            default:
+                pix_fmt_str = "???";
+                break;
+            }
+            picture_size = video_handle->packet_size;
+            picture_in_buf = malloc(picture_size);
+            if (!picture_in_buf)
+                goto fail;
+            /* allocate a temporary picture if not grabbing in 420P format */
+            if (pix_fmt != PIX_FMT_YUV420P) {
+                picture_420p = malloc((width * height * 3) / 2);
+            }
+            fprintf(stderr, "Video sampling: %dx%d, %s format, %0.2f fps\n", 
+                    width, height, pix_fmt_str, (float)frame_rate / FRAME_RATE_BASE);
+        }
+    }
+
+    if (!use_video && !use_audio) {
+        fprintf(stderr,"Could not open grab devices : exiting\n");
+        exit(1);
+    }
+
+    /* init built in conversion functions */
+    for(i=0;i<s->nb_streams;i++) {
+        ost = ost_table[i];
+        enc = &ost->st->codec;
+        switch(enc->codec_type) {
+        case CODEC_TYPE_AUDIO:
+            ost->audio_resample = 0;
+            if ((enc->channels != channels ||
+                 enc->sample_rate != sample_rate)) {
+                ost->audio_resample = 1;
+                ost->resample = audio_resample_init(enc->channels, channels,
+                                                    enc->sample_rate, sample_rate);
+            }
+            if (fifo_init(&ost->fifo, (2 * audio_fifo_size * enc->sample_rate) / 
+                          sample_rate))
+                goto fail;
+            break;
+        case CODEC_TYPE_VIDEO:
+            ost->video_resample = 0;
+            if (enc->width != width ||
+                enc->height != height) {
+                UINT8 *buf;
+                ost->video_resample = 1;
+                buf = malloc((enc->width * enc->height * 3) / 2);
+                if (!buf)
+                    goto fail;
+                ost->pict_tmp.data[0] = buf;
+                ost->pict_tmp.data[1] = buf + enc->width * height;
+                ost->pict_tmp.data[2] = ost->pict_tmp.data[1] + (enc->width * height) / 4;
+                ost->pict_tmp.linesize[0] = enc->width;
+                ost->pict_tmp.linesize[1] = enc->width / 2;
+                ost->pict_tmp.linesize[2] = enc->width / 2;
+                ost->img_resample_ctx = img_resample_init(
+                                  ost->st->codec.width, ost->st->codec.height,
+                                  width, height);
+            }
+        }
+    }
+
+    fprintf(stderr, "Press [q] to stop encoding\n");
+
+    s->format->write_header(s);
+    time_start = gettime();
+    term_init();
+    
+    for(;;) {
+        /* if 'q' pressed, exits */
+        if (read_key() == 'q')
+            break;
+
+        /* read & compress audio frames */
+        if (use_audio) {
+            int ret, nb_samples, nb_samples_out;
+            UINT8 *buftmp;
+
+            for(;;) {
+                ret = url_read(audio_handle, audio_buf, audio_fifo_size);
+                if (ret <= 0)
+                    break;
+                /* fill each codec fifo by doing the right sample
+                   rate conversion. This is not optimal because we
+                   do too much work, but it is easy to do */
+                nb_samples = ret / (channels * 2);
+                for(i=0;i<s->nb_streams;i++) {
+                    ost = ost_table[i];
+                    enc = &ost->st->codec;
+                    if (enc->codec_type == CODEC_TYPE_AUDIO) {
+                        /* rate & stereo convertion */
+                        if (!ost->audio_resample) {
+                            buftmp = audio_buf;
+                            nb_samples_out = nb_samples;
+                        } else {
+                            buftmp = audio_buf1;
+                            nb_samples_out = audio_resample(ost->resample, 
+                                                            (short *)buftmp, (short *)audio_buf,
+                                                            nb_samples);
+                        }
+                        fifo_write(&ost->fifo, buftmp, nb_samples_out * enc->channels * 2, 
+                                   &ost->fifo.wptr);
+                    }
+                }
+                
+                /* compress as many frame as possible with each audio codec */
+                for(i=0;i<s->nb_streams;i++) {
+                    ost = ost_table[i];
+                    enc = &ost->st->codec;
+                    if (enc->codec_type == CODEC_TYPE_AUDIO) {
+                        frame_bytes = enc->frame_size * 2 * enc->channels;
+                        
+                        while (fifo_read(&ost->fifo, audio_buf, 
+                                         frame_bytes, &ost->fifo.rptr) == 0) {
+                            ret = avcodec_encode_audio(enc,
+                                                       audio_out, sizeof(audio_out), 
+                                                       (short *)audio_buf);
+                            s->format->write_packet(s, ost->index, audio_out, ret);
+                        }
+                    }
+                }
+            }
+        }
+
+        if (use_video) {
+            AVPicture *picture1;
+            AVPicture picture;
+            UINT8 *pict_buffer;
+
+            ret = url_read(video_handle, picture_in_buf, picture_size);
+            if (ret < 0)
+                break;
+            if (pix_fmt != PIX_FMT_YUV420P) {
+                pict_buffer = picture_420p;
+                img_convert_to_yuv420(pict_buffer, picture_in_buf, pix_fmt, width, height);
+            } else {
+                pict_buffer = picture_in_buf;
+            }
+            /* build a picture storage */
+            picture.data[0] = pict_buffer;
+            picture.data[1] = picture.data[0] + width * height;
+            picture.data[2] = picture.data[1] + (width * height) / 4;
+            picture.linesize[0] = width;
+            picture.linesize[1] = width / 2;
+            picture.linesize[2] = width / 2;
+            
+            for(i=0;i<s->nb_streams;i++) {
+                ost = ost_table[i];
+                enc = &ost->st->codec;
+                if (enc->codec_type == CODEC_TYPE_VIDEO) {
+                    int n1, n2, nb;
+
+                    /* feed each codec with its requested frame rate */
+                    n1 = ((INT64)frame_number * enc->frame_rate) / frame_rate;
+                    n2 = (((INT64)frame_number + 1) * enc->frame_rate) / frame_rate;
+                    nb = n2 - n1;
+                    if (nb > 0) {
+                        /* resize the picture if needed */
+                        if (ost->video_resample) {
+                            picture1 = &ost->pict_tmp;
+                            img_resample(ost->img_resample_ctx, 
+                                         picture1, &picture);
+                        } else {
+                            picture1 = &picture;
+                        }
+                        ret = avcodec_encode_video(enc, video_buffer, 
+                                                   sizeof(video_buffer), 
+                                                   picture1);
+                        s->format->write_packet(s, ost->index, video_buffer, ret);
+                    }
+                }
+            }
+            frame_number++;
+        }
+        
+        /* write report */
+        {
+            char buf[1024];
+            INT64 total_size;
+            float ti, bitrate;
+            static float last_ti;
+            INT64 ti1;
+
+            total_size = url_ftell(&s->pb);
+            ti1 = gettime() - time_start;
+            /* check elapsed time */
+            if (recording_time && ti1 >= recording_time)
+                break;
+
+            ti = ti1 / 1000000.0;
+            if (ti < 0.1)
+                ti = 0.1;
+            /* dispaly twice per second */
+            if ((ti - last_ti) >= 0.5) {
+                last_ti = ti;
+                bitrate = (int)((total_size * 8) / ti / 1000.0);
+                
+                buf[0] = '\0';
+                if (use_video) {
+                    sprintf(buf + strlen(buf), "frame=%5d fps=%4.1f q=%2d ",
+                            frame_number, (float)frame_number / ti, first_video_enc->quality);
+                }
+                
+                sprintf(buf + strlen(buf), "size=%8LdkB time=%0.1f bitrate=%6.1fkbits/s", 
+                        total_size / 1024, ti, bitrate);
+                fprintf(stderr, "%s    \r", buf);
+                fflush(stderr);
+            }
+        }
+    }
+    term_exit();
+
+    for(i=0;i<s->nb_streams;i++) {
+        ost = ost_table[i];
+        enc = &ost->st->codec;
+        avcodec_close(enc);
+    }
+    s->format->write_trailer(s);
+    
+    if (audio_handle)
+        url_close(audio_handle);
+
+    if (video_handle)
+        url_close(video_handle);
+
+    /* write report */
+    {
+        float ti, bitrate;
+        INT64 total_size;
+
+        total_size = url_ftell(&s->pb);
+
+        ti = (gettime() - time_start) / 1000000.0;
+        if (ti < 0.1)
+            ti = 0.1;
+        bitrate = (int)((total_size * 8) / ti / 1000.0);
+
+        fprintf(stderr, "\033[K\nTotal time = %0.1f s, %Ld KBytes, %0.1f kbits/s\n", 
+                ti, total_size / 1024, bitrate);
+        if (use_video) {
+            fprintf(stderr, "Total frames = %d\n", frame_number);
+        }
+    }
+
+    ret = 0;
+ fail1:
+    if (picture_in_buf)
+        free(picture_in_buf);
+    if (picture_420p)
+        free(picture_420p);
+    for(i=0;i<s->nb_streams;i++) {
+        ost = ost_table[i];
+        if (ost) {
+            if (ost->fifo.buffer)
+                fifo_free(&ost->fifo);
+            if (ost->pict_tmp.data[0])
+                free(ost->pict_tmp.data[0]);
+            if (ost->video_resample)
+                img_resample_close(ost->img_resample_ctx);
+            if (ost->audio_resample)
+                audio_resample_close(ost->resample);
+            free(ost);
+        }
+    }
+    return ret;
+ fail:
+    ret = -ENOMEM;
+    goto fail1;
+}
+
+int read_ffserver_streams(AVFormatContext *s, const char *filename)
+{
+    int i;
+    AVFormatContext *ic;
+
+    ic = av_open_input_file(filename, FFM_PACKET_SIZE);
+    if (!ic)
+        return -EIO;
+    /* copy stream format */
+    s->nb_streams = ic->nb_streams;
+    for(i=0;i<ic->nb_streams;i++) {
+        AVStream *st;
+        st = av_mallocz(sizeof(AVFormatContext));
+        memcpy(st, ic->streams[i], sizeof(AVStream));
+        s->streams[i] = st;
+    }
+
+    av_close_input_file(ic);
+    return 0;
+}
+
+#define MAX_AUDIO_PACKET_SIZE 16384
+
+static void do_audio_out(AVFormatContext *s, 
+                         AVOutputStream *ost, 
+                         AVInputStream *ist,
+                         unsigned char *buf, int size)
+{
+    UINT8 *buftmp;
+    UINT8 audio_buf[2*MAX_AUDIO_PACKET_SIZE]; /* XXX: allocate it */
+    UINT8 audio_out[MAX_AUDIO_PACKET_SIZE]; /* XXX: allocate it */
+    int size_out, frame_bytes, ret;
+    AVCodecContext *enc;
+
+    enc = &ost->st->codec;
+
+    if (ost->audio_resample) {
+        buftmp = audio_buf;
+        size_out = audio_resample(ost->resample, 
+                                  (short *)buftmp, (short *)buf,
+                                  size / (ist->st->codec.channels * 2));
+        size_out = size_out * enc->channels * 2;
+    } else {
+        buftmp = buf;
+        size_out = size;
+    }
+
+    /* now encode as many frames as possible */
+    if (enc->codec_id != CODEC_ID_PCM) {
+        /* output resampled raw samples */
+        fifo_write(&ost->fifo, buftmp, size_out, 
+                   &ost->fifo.wptr);
+
+        frame_bytes = enc->frame_size * 2 * enc->channels;
+        
+        while (fifo_read(&ost->fifo, audio_buf, frame_bytes, 
+                     &ost->fifo.rptr) == 0) {
+            ret = avcodec_encode_audio(enc,
+                                       audio_out, sizeof(audio_out), (short *)audio_buf);
+            s->format->write_packet(s, ost->index, audio_out, ret);
+        }
+    } else {
+        /* XXX: handle endianness */
+        s->format->write_packet(s, ost->index, buftmp, size_out);
+    }
+}
+
+/* write a picture to a raw mux */
+static void write_picture(AVFormatContext *s, int index, AVPicture *picture, int w, int h)
+{
+    UINT8 *buf, *src, *dest;
+    int size, j, i;
+    /* XXX: not efficient, should add test if we can take
+       directly the AVPicture */
+    size = (w * h) * 3 / 2; 
+    buf = malloc(size);
+    dest = buf;
+    for(i=0;i<3;i++) {
+        if (i == 1) {
+            w >>= 1;
+            h >>= 1;
+        }
+        src = picture->data[i];
+        for(j=0;j<h;j++) {
+            memcpy(dest, src, w);
+            dest += w;
+            src += picture->linesize[i];
+        }
+    }
+    s->format->write_packet(s, index, buf, size);
+    free(buf);
+}
+
+
+static void do_video_out(AVFormatContext *s, 
+                         AVOutputStream *ost, 
+                         AVInputStream *ist,
+                         AVPicture *pict)
+{
+    int n1, n2, nb, i, ret, frame_number;
+    AVPicture *picture;
+    UINT8 video_buffer[128*1024];
+    AVCodecContext *enc;
+
+    enc = &ost->st->codec;
+
+    frame_number = ist->frame_number;
+    /* first drop frame if needed */
+    n1 = ((INT64)frame_number * enc->frame_rate) / ist->st->codec.frame_rate;
+    n2 = (((INT64)frame_number + 1) * enc->frame_rate) / ist->st->codec.frame_rate;
+    nb = n2 - n1;
+    if (nb <= 0)
+        return;
+    
+    if (ost->video_resample) {
+        picture = &ost->pict_tmp;
+        img_resample(ost->img_resample_ctx, picture, pict);
+    } else {
+        picture = pict;
+    }
+
+    /* duplicates frame if needed */
+    /* XXX: pb because no interleaving */
+    for(i=0;i<nb;i++) {
+        if (enc->codec_id != CODEC_ID_RAWVIDEO) {
+            /* handles sameq here. This is not correct because it may
+               not be a global option */
+            if (same_quality) {
+                ost->st->codec.quality = ist->st->codec.quality;
+            }
+            ret = avcodec_encode_video(&ost->st->codec, 
+                                       video_buffer, sizeof(video_buffer), 
+                                       picture);
+            s->format->write_packet(s, ost->index, video_buffer, ret);
+        } else {
+            write_picture(s, ost->index, picture, enc->width, enc->height);
+        }
+    }
+}
+
+//#define HEX_DUMP
+
+#ifdef HEX_DUMP
+static void hex_dump(UINT8 *buf, int size)
+{
+    int len, i, j, c;
+
+    for(i=0;i<size;i+=16) {
+        len = size - i;
+        if (len > 16)
+            len = 16;
+        printf("%08x ", i);
+        for(j=0;j<16;j++) {
+            if (j < len)
+                printf(" %02x", buf[i+j]);
+            else
+                printf("   ");
+        }
+        printf(" ");
+        for(j=0;j<len;j++) {
+            c = buf[i+j];
+            if (c < ' ' || c > '~')
+                c = '.';
+            printf("%c", c);
+        }
+        printf("\n");
+    }
+}
+#endif
+
+/*
+ * The following code is the main loop of the file converter
+ */
+static int av_encode(AVFormatContext **output_files,
+                     int nb_output_files,
+                     AVFormatContext **input_files,
+                     int nb_input_files,
+                     AVStreamMap *stream_maps, int nb_stream_maps)
+{
+    int ret, i, j, k, n, nb_istreams, nb_ostreams = 0;
+    AVFormatContext *is, *os;
+    AVCodecContext *codec, *icodec;
+    AVOutputStream *ost, **ost_table = NULL;
+    AVInputStream *ist, **ist_table = NULL;
+    INT64 min_pts, start_time;
+    AVInputFile file_table[nb_input_files];
+
+    memset(file_table, 0, sizeof(file_table));
+    
+    /* input stream init */
+    j = 0;
+    for(i=0;i<nb_input_files;i++) {
+        is = input_files[i];
+        file_table[i].ist_index = j;
+        j += is->nb_streams;
+    }
+    nb_istreams = j;
+
+    ist_table = av_mallocz(nb_istreams * sizeof(AVInputStream *));
+    if (!ist_table)
+        return -ENOMEM;
+    
+    for(i=0;i<nb_istreams;i++) {
+        ist = av_mallocz(sizeof(AVInputStream));
+        if (!ist)
+            goto fail;
+        ist_table[i] = ist;
+    }
+    j = 0;
+    for(i=0;i<nb_input_files;i++) {
+        is = input_files[i];
+        for(k=0;k<is->nb_streams;k++) {
+            ist = ist_table[j++];
+            ist->st = is->streams[k];
+            ist->file_index = i;
+            ist->index = k;
+            ist->discard = 1; /* the stream is discarded by default
+                                 (changed later) */
+        }
+    }
+
+    /* output stream init */
+    nb_ostreams = 0;
+    for(i=0;i<nb_output_files;i++) {
+        os = output_files[i];
+        nb_ostreams += os->nb_streams;
+    }
+    if (nb_stream_maps > 0 && nb_stream_maps != nb_ostreams) {
+        fprintf(stderr, "Number of stream maps must match number of output streams\n");
+        exit(1);
+    }
+
+    ost_table = av_mallocz(sizeof(AVOutputStream *) * nb_ostreams);
+    if (!ost_table)
+        goto fail;
+    for(i=0;i<nb_ostreams;i++) {
+        ost = av_mallocz(sizeof(AVOutputStream));
+        if (!ost)
+            goto fail;
+        ost_table[i] = ost;
+    }
+    
+    n = 0;
+    for(k=0;k<nb_output_files;k++) {
+        os = output_files[k];
+        for(i=0;i<os->nb_streams;i++) {
+            int found;
+            ost = ost_table[n++];
+            ost->file_index = k;
+            ost->index = i;
+            ost->st = os->streams[i];
+            if (nb_stream_maps > 0) {
+                ost->source_index = file_table[stream_maps[n-1].file_index].ist_index + 
+                    stream_maps[n-1].stream_index;
+            } else {
+                /* get corresponding input stream index : we select the first one with the right type */
+                found = 0;
+                for(j=0;j<nb_istreams;j++) {
+                    ist = ist_table[j];
+                    if (ist->discard && 
+                        ist->st->codec.codec_type == ost->st->codec.codec_type) {
+                        ost->source_index = j;
+                        found = 1;
+                    }
+                }
+                
+                if (!found) {
+                    /* try again and reuse existing stream */
+                    for(j=0;j<nb_istreams;j++) {
+                        ist = ist_table[j];
+                        if (ist->st->codec.codec_type == ost->st->codec.codec_type) {
+                            ost->source_index = j;
+                            found = 1;
+                        }
+                    }
+                    if (!found) {
+                        fprintf(stderr, "Could not find input stream matching output stream #%d.%d\n",
+                                ost->file_index, ost->index);
+                        exit(1);
+                    }
+                }
+            }
+            ist = ist_table[ost->source_index];
+            ist->discard = 0;
+        }
+    }
+
+    /* dump the stream mapping */
+    fprintf(stderr, "Stream mapping:\n");
+    for(i=0;i<nb_ostreams;i++) {
+        ost = ost_table[i];
+        fprintf(stderr, "  Stream #%d.%d -> #%d.%d\n",
+                ist_table[ost->source_index]->file_index,
+                ist_table[ost->source_index]->index,
+                ost->file_index, 
+                ost->index);
+    }
+
+    /* for each output stream, we compute the right encoding parameters */
+    for(i=0;i<nb_ostreams;i++) {
+        ost = ost_table[i];
+        ist = ist_table[ost->source_index];
+
+        codec = &ost->st->codec;
+        icodec = &ist->st->codec;
+
+        switch(codec->codec_type) {
+        case CODEC_TYPE_AUDIO:
+            /* check if same codec with same parameters. If so, no
+               reencoding is needed */
+            if (codec->codec_id == icodec->codec_id &&
+                codec->bit_rate == icodec->bit_rate &&
+                codec->sample_rate == icodec->sample_rate &&
+                codec->channels == icodec->channels) {
+                /* no reencoding */
+            } else {
+                if (fifo_init(&ost->fifo, 2 * MAX_AUDIO_PACKET_SIZE))
+                    goto fail;
+
+                if (codec->channels == icodec->channels &&
+                    codec->sample_rate == icodec->sample_rate) {
+                    ost->audio_resample = 0;
+                } else {
+                    ost->audio_resample = 1;
+                    ost->resample = audio_resample_init(codec->channels, icodec->channels,
+                                                        codec->sample_rate, 
+                                                        icodec->sample_rate);
+                }
+                ist->decoding_needed = 1;
+                ost->encoding_needed = 1;
+            }
+            break;
+        case CODEC_TYPE_VIDEO:
+            /* check if same codec with same parameters. If so, no
+               reencoding is needed */
+            if (codec->codec_id == icodec->codec_id &&
+                codec->bit_rate == icodec->bit_rate &&
+                codec->frame_rate == icodec->frame_rate &&
+                codec->width == icodec->width &&
+                codec->height == icodec->height) {
+                /* no reencoding */
+            } else {
+                if (codec->width == icodec->width &&
+                    codec->height == icodec->height) {
+                    ost->video_resample = 0;
+                } else {
+                    UINT8 *buf;
+                    ost->video_resample = 1;
+                    buf = malloc((codec->width * codec->height * 3) / 2);
+                    if (!buf)
+                        goto fail;
+                    ost->pict_tmp.data[0] = buf;
+                    ost->pict_tmp.data[1] = ost->pict_tmp.data[0] + (codec->width * codec->height);
+                    ost->pict_tmp.data[2] = ost->pict_tmp.data[1] + (codec->width * codec->height) / 4;
+                    ost->pict_tmp.linesize[0] = codec->width;
+                    ost->pict_tmp.linesize[1] = codec->width / 2;
+                    ost->pict_tmp.linesize[2] = codec->width / 2;
+
+                    ost->img_resample_ctx = img_resample_init( 
+                                      ost->st->codec.width, ost->st->codec.height,
+                                      ist->st->codec.width, ist->st->codec.height);
+                }
+                ost->encoding_needed = 1;
+                ist->decoding_needed = 1;
+            }
+            break;
+        }
+    }
+
+    /* open each encoder */
+    for(i=0;i<nb_ostreams;i++) {
+        ost = ost_table[i];
+        if (ost->encoding_needed) {
+            AVCodec *codec;
+            codec = avcodec_find_encoder(ost->st->codec.codec_id);
+            if (!codec) {
+                fprintf(stderr, "Unsupported codec for output stream #%d.%d\n", 
+                        ost->file_index, ost->index);
+                exit(1);
+            }
+            if (avcodec_open(&ost->st->codec, codec) < 0) {
+                fprintf(stderr, "Error while opening codec for stream #%d.%d - maybe incorrect parameters such as bit_rate, rate, width or height\n", 
+                        ost->file_index, ost->index);
+                exit(1);
+            }
+        }
+    }
+
+    /* open each decoder */
+    for(i=0;i<nb_istreams;i++) {
+        ist = ist_table[i];
+        if (ist->decoding_needed) {
+            AVCodec *codec;
+            codec = avcodec_find_decoder(ist->st->codec.codec_id);
+            if (!codec) {
+                fprintf(stderr, "Unsupported codec for input stream #%d.%d\n", 
+                        ist->file_index, ist->index);
+                exit(1);
+            }
+            if (avcodec_open(&ist->st->codec, codec) < 0) {
+                fprintf(stderr, "Error while opening codec for input stream #%d.%d\n", 
+                        ist->file_index, ist->index);
+                exit(1);
+            }
+        }
+    }
+
+    /* init pts */
+    for(i=0;i<nb_istreams;i++) {
+        ist = ist_table[i];
+        ist->pts = 0;
+        ist->frame_number = 0;
+    }
+    
+    /* compute buffer size max (should use a complete heuristic) */
+    for(i=0;i<nb_input_files;i++) {
+        file_table[i].buffer_size_max = 2048;
+    }
+
+    /* open files and write file headers */
+    for(i=0;i<nb_output_files;i++) {
+        os = output_files[i];
+        os->format->write_header(os);
+    }
+
+    start_time = gettime();
+    min_pts = 0;
+    for(;;) {
+        int file_index, ist_index;
+        AVPacket pkt;
+        UINT8 *ptr;
+        int len;
+        UINT8 *data_buf;
+        int data_size, got_picture;
+        AVPicture picture;
+        short samples[AVCODEC_MAX_AUDIO_FRAME_SIZE / 2];
+
+        /* select the input file with the smallest pts */
+    redo:
+        file_index = -1;
+        min_pts = (1ULL << 63) - 1;
+        for(i=0;i<nb_istreams;i++) {
+            ist = ist_table[i];
+            if (!ist->discard && !file_table[ist->file_index].eof_reached && ist->pts < min_pts) {
+                min_pts = ist->pts;
+                file_index = ist->file_index;
+            }
+        }
+        /* if none, if is finished */
+        if (file_index < 0)
+            break;
+        /* finish if recording time exhausted */
+        if (recording_time > 0 && min_pts >= recording_time)
+            break;
+        /* read a packet from it and output it in the fifo */
+        
+        is = input_files[file_index];
+        if (av_read_packet(is, &pkt) < 0) {
+            file_table[file_index].eof_reached = 1;
+            continue;
+        }
+        ist_index = file_table[file_index].ist_index + pkt.stream_index;
+        ist = ist_table[ist_index];
+        if (ist->discard) {
+            continue;
+        }
+
+#ifdef HEX_DUMP
+        printf("stream #%d, size=%d:\n", pkt.stream_index, pkt.size);
+        hex_dump(pkt.data, pkt.size);
+#endif
+
+        //        printf("read #%d.%d size=%d\n", ist->file_index, ist->index, pkt.size);
+
+        len = pkt.size;
+        ptr = pkt.data;
+        while (len > 0) {
+
+            /* decode the packet if needed */
+            data_buf = NULL; /* fail safe */
+            data_size = 0;
+            if (ist->decoding_needed) {
+                switch(ist->st->codec.codec_type) {
+                case CODEC_TYPE_AUDIO:
+                    if (ist->st->codec.codec_id == CODEC_ID_PCM) {
+                        /* no need to call a codec */
+                        data_buf = ptr;
+                        data_size = len;
+                        ret = len;
+                    } else {
+                        ret = avcodec_decode_audio(&ist->st->codec, samples, &data_size,
+                                                   ptr, len);
+                        if (ret < 0)
+                            goto fail_decode;
+                        if (data_size == 0) {
+                            /* no audio frame */
+                            ptr += ret;
+                            len -= ret;
+                            continue;
+                        }
+                        data_buf = (UINT8 *)samples;
+                    }
+                    break;
+                case CODEC_TYPE_VIDEO:
+                    if (ist->st->codec.codec_id == CODEC_ID_RAWVIDEO) {
+                        int size;
+                        size = (ist->st->codec.width * ist->st->codec.height);
+                        
+                        picture.data[0] = ptr;
+                        picture.data[1] = picture.data[0] + size;
+                        picture.data[2] = picture.data[1] + size / 4;
+                        picture.linesize[0] = ist->st->codec.width;
+                        picture.linesize[1] = ist->st->codec.width / 2;
+                        picture.linesize[2] = ist->st->codec.width / 2;
+                        ret = len;
+                    } else {
+                        data_size = (ist->st->codec.width * ist->st->codec.height * 3) / 2;
+                        ret = avcodec_decode_video(&ist->st->codec, 
+                                                   &picture, &got_picture, ptr, len);
+                        if (ret < 0) {
+                        fail_decode:
+                            fprintf(stderr, "Error while decoding stream #%d.%d\n",
+                                    ist->file_index, ist->index);
+                            av_free_packet(&pkt);
+                            goto redo;
+                        }
+                        if (!got_picture) {
+                            /* no picture yet */
+                            ptr += ret;
+                            len -= ret;
+                            continue;
+                        }
+                    }
+                    break;
+                default:
+                    goto fail_decode;
+                }
+            } else {
+                data_buf = ptr;
+                data_size = len;
+                ret = len;
+            }
+            /* update pts */
+            switch(ist->st->codec.codec_type) {
+            case CODEC_TYPE_AUDIO:
+                ist->pts = (INT64)1000000 * ist->sample_index / ist->st->codec.sample_rate;
+                ist->sample_index += data_size / (2 * ist->st->codec.channels);
+                break;
+            case CODEC_TYPE_VIDEO:
+                ist->frame_number++;
+                ist->pts = ((INT64)ist->frame_number * 1000000 * FRAME_RATE_BASE) / 
+                    ist->st->codec.frame_rate;
+                break;
+            }
+            ptr += ret;
+            len -= ret;
+
+            /* transcode raw format, encode packets and output them */
+            
+            for(i=0;i<nb_ostreams;i++) {
+                ost = ost_table[i];
+                if (ost->source_index == ist_index) {
+                    os = output_files[ost->file_index];
+
+                    if (ost->encoding_needed) {
+                        switch(ost->st->codec.codec_type) {
+                        case CODEC_TYPE_AUDIO:
+                            do_audio_out(os, ost, ist, data_buf, data_size);
+                            break;
+                        case CODEC_TYPE_VIDEO:
+                            do_video_out(os, ost, ist, &picture);
+                            break;
+                        }
+                    } else {
+                        /* no reencoding needed : output the packet directly */
+                        os->format->write_packet(os, ost->index, data_buf, data_size);
+                    }
+                }
+            }
+        }
+        av_free_packet(&pkt);
+        
+        /* dump report by using the first video and audio streams */
+        {
+            char buf[1024];
+            AVFormatContext *oc;
+            INT64 total_size, ti;
+            AVCodecContext *enc;
+            int frame_number, vid;
+            double bitrate, ti1;
+            static INT64 last_time;
+
+            if ((min_pts - last_time) >= 500000) {
+                last_time = min_pts;
+                
+                oc = output_files[0];
+                
+                total_size = url_ftell(&oc->pb);
+                
+                buf[0] = '\0';
+                ti = (1ULL << 63) - 1;
+                vid = 0;
+                for(i=0;i<nb_ostreams;i++) {
+                    ost = ost_table[i];
+                    enc = &ost->st->codec;
+                    ist = ist_table[ost->source_index];
+                    if (!vid && enc->codec_type == CODEC_TYPE_VIDEO) {
+                        frame_number = ist->frame_number;
+                        sprintf(buf + strlen(buf), "frame=%5d q=%2d ",
+                                frame_number, enc->quality);
+                        vid = 1;
+                    }
+                    /* compute min pts value */
+                    if (!ist->discard && ist->pts < ti) {
+                        ti = ist->pts;
+                    }
+                }
+
+                ti1 = ti / 1000000.0;
+                if (ti1 < 0.1)
+                    ti1 = 0.1;
+                bitrate = (double)(total_size * 8) / ti1 / 1000.0;
+
+                sprintf(buf + strlen(buf), "size=%8LdkB time=%0.1f bitrate=%6.1fkbits/s", 
+                        total_size / 1024, ti1, bitrate);
+                
+                fprintf(stderr, "%s    \r", buf);
+                fflush(stderr);
+            }
+        }
+    }
+
+    /* dump report by using the first video and audio streams */
+    {
+        char buf[1024];
+        AVFormatContext *oc;
+        INT64 total_size, ti;
+        AVCodecContext *enc;
+        int frame_number, vid;
+        double bitrate, ti1;
+
+        oc = output_files[0];
+        
+        total_size = url_ftell(&oc->pb);
+        
+        buf[0] = '\0';
+        ti = (1ULL << 63) - 1;
+        vid = 0;
+        for(i=0;i<nb_ostreams;i++) {
+            ost = ost_table[i];
+            enc = &ost->st->codec;
+            ist = ist_table[ost->source_index];
+            if (!vid && enc->codec_type == CODEC_TYPE_VIDEO) {
+                frame_number = ist->frame_number;
+                sprintf(buf + strlen(buf), "frame=%5d q=%2d ",
+                        frame_number, enc->quality);
+                vid = 1;
+            }
+            /* compute min pts value */
+            if (!ist->discard && ist->pts < ti) {
+                ti = ist->pts;
+            }
+        }
+        
+        ti1 = ti / 1000000.0;
+        if (ti1 < 0.1)
+            ti1 = 0.1;
+        bitrate = (double)(total_size * 8) / ti1 / 1000.0;
+        
+        sprintf(buf + strlen(buf), "size=%8LdkB time=%0.1f bitrate=%6.1fkbits/s", 
+                total_size / 1024, ti1, bitrate);
+        
+        fprintf(stderr, "%s    \n", buf);
+    }
+    /* close each encoder */
+    for(i=0;i<nb_ostreams;i++) {
+        ost = ost_table[i];
+        if (ost->encoding_needed) {
+            avcodec_close(&ost->st->codec);
+        }
+    }
+    
+    /* close each decoder */
+    for(i=0;i<nb_istreams;i++) {
+        ist = ist_table[i];
+        if (ist->decoding_needed) {
+            avcodec_close(&ist->st->codec);
+        }
+    }
+    
+
+    /* write the trailer if needed and close file */
+    for(i=0;i<nb_output_files;i++) {
+        os = output_files[i];
+        os->format->write_trailer(os);
+    }
+    /* finished ! */
+    
+    ret = 0;
+ fail1:
+    if (ist_table) {
+        for(i=0;i<nb_istreams;i++) {
+            ist = ist_table[i];
+            if (ist) {
+                free(ist);
+            }
+        }
+        free(ist_table);
+    }
+    if (ost_table) {
+        for(i=0;i<nb_ostreams;i++) {
+            ost = ost_table[i];
+            if (ost) {
+                if (ost->pict_tmp.data[0])
+                    free(ost->pict_tmp.data[0]);
+                if (ost->video_resample)
+                    img_resample_close(ost->img_resample_ctx);
+                if (ost->audio_resample)
+                    audio_resample_close(ost->resample);
+                free(ost);
+            }
+        }
+        free(ost_table);
+    }
+    return ret;
+ fail:
+    ret = -ENOMEM;
+    goto fail1;
+}
+
+#if 0
+int file_read(const char *filename)
+{
+    URLContext *h;
+    unsigned char buffer[1024];
+    int len, i;
+
+    if (url_open(&h, filename, O_RDONLY) < 0) {
+        printf("could not open '%s'\n", filename);
+        return -1;
+    }
+    for(;;) {
+        len = url_read(h, buffer, sizeof(buffer));
+        if (len <= 0)
+            break;
+        for(i=0;i<len;i++) putchar(buffer[i]);
+    }
+    url_close(h);
+    return 0;
+}
+#endif
+
+void show_licence(void)
+{
+    printf(
+    "ffmpeg version " FFMPEG_VERSION "\n"
+    "Copyright (c) 2000,2001 Gerard Lantau\n"
+    "This program is free software; you can redistribute it and/or modify\n"
+    "it under the terms of the GNU General Public License as published by\n"
+    "the Free Software Foundation; either version 2 of the License, or\n"
+    "(at your option) any later version.\n"
+    "\n"
+    "This program is distributed in the hope that it will be useful,\n"
+    "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
+    "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n"
+    "GNU General Public License for more details.\n"
+    "\n"
+    "You should have received a copy of the GNU General Public License\n"
+    "along with this program; if not, write to the Free Software\n"
+    "Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.\n"
+    );
+    exit(1);
+}
+
+void opt_format(const char *arg)
+{
+    AVFormat *f;
+    f = first_format;
+    while (f != NULL && strcmp(f->name, arg) != 0) f = f->next;
+    if (f == NULL) {
+        fprintf(stderr, "Invalid format: %s\n", arg);
+        exit(1);
+    }
+    file_format = f;
+}
+
+void opt_video_bitrate(const char *arg)
+{
+    video_bit_rate = atoi(arg) * 1000;
+}
+
+void opt_frame_rate(const char *arg)
+{
+    frame_rate = (int)(strtod(arg, 0) * FRAME_RATE_BASE);
+}
+
+void opt_frame_size(const char *arg)
+{
+    parse_image_size(&frame_width, &frame_height, arg);
+    if (frame_width <= 0 || frame_height <= 0) {
+        fprintf(stderr, "Incorrect frame size\n");
+        exit(1);
+    }
+    if ((frame_width % 2) != 0 || (frame_height % 2) != 0) {
+        fprintf(stderr, "Frame size must be a multiple of 2\n");
+        exit(1);
+    }
+}
+
+void opt_gop_size(const char *arg)
+{
+    gop_size = atoi(arg);
+}
+
+void opt_qscale(const char *arg)
+{
+    video_qscale = atoi(arg);
+    if (video_qscale < 0 ||
+        video_qscale > 31) {
+        fprintf(stderr, "qscale must be >= 1 and <= 31\n");
+        exit(1);
+    }
+}
+
+
+void opt_audio_bitrate(const char *arg)
+{
+    audio_bit_rate = atoi(arg) * 1000;
+}
+
+void opt_audio_rate(const char *arg)
+{
+    audio_sample_rate = atoi(arg);
+}
+
+void opt_audio_channels(const char *arg)
+{
+    audio_channels = atoi(arg);
+}
+
+void opt_video_device(const char *arg)
+{
+    v4l_device = strdup(arg);
+}
+
+void opt_audio_device(const char *arg)
+{
+    audio_device = strdup(arg);
+}
+
+void opt_audio_codec(const char *arg)
+{
+    AVCodec *p;
+
+    p = first_avcodec;
+    while (p) {
+        if (!strcmp(p->name, arg) && p->type == CODEC_TYPE_AUDIO)
+            break;
+        p = p->next;
+    }
+    if (p == NULL) {
+        fprintf(stderr, "Unknown audio codec '%s'\n", arg);
+        exit(1);
+    } else {
+        audio_codec_id = p->id;
+    }
+}
+
+const char *motion_str[] = {
+    "zero",
+    "full",
+    "log",
+    "phods",
+    NULL,
+};
+
+void opt_motion_estimation(const char *arg)
+{
+    const char **p;
+    p = motion_str;
+    for(;;) {
+        if (!*p) {
+            fprintf(stderr, "Unknown motion estimation method '%s'\n", arg);
+            exit(1);
+        }
+        if (!strcmp(*p, arg))
+            break;
+        p++;
+    }
+    motion_estimation_method = p - motion_str;
+}
+
+void opt_video_codec(const char *arg)
+{
+    AVCodec *p;
+
+    p = first_avcodec;
+    while (p) {
+        if (!strcmp(p->name, arg) && p->type == CODEC_TYPE_VIDEO)
+            break;
+        p = p->next;
+    }
+    if (p == NULL) {
+        fprintf(stderr, "Unknown video codec '%s'\n", arg);
+        exit(1);
+    } else {
+        video_codec_id = p->id;
+    }
+}
+
+void opt_map(const char *arg)
+{
+    AVStreamMap *m;
+    const char *p;
+
+    p = arg;
+    m = &stream_maps[nb_stream_maps++];
+
+    m->file_index = strtol(arg, (char **)&p, 0);
+    if (*p)
+        p++;
+    m->stream_index = strtol(arg, (char **)&p, 0);
+}
+
+void opt_recording_time(const char *arg)
+{
+    recording_time = parse_date(arg, 1);
+}
+
+/* return the number of packet read to find the codec parameters */
+int find_codec_parameters(AVFormatContext *ic)
+{
+    int val, i, count, ret, got_picture, size;
+    AVCodec *codec;
+    AVCodecContext *enc;
+    AVStream *st;
+    AVPacket *pkt;
+    AVPicture picture;
+    AVPacketList *pktl, **ppktl;
+    short samples[AVCODEC_MAX_AUDIO_FRAME_SIZE / 2];
+    UINT8 *ptr;
+
+    count = 0;
+    ppktl = &ic->packet_buffer;
+    for(;;) {
+        for(i=0;i<ic->nb_streams;i++) {
+            enc = &ic->streams[i]->codec;
+            
+            switch(enc->codec_type) {
+            case CODEC_TYPE_AUDIO:
+                val = enc->sample_rate;
+                break;
+            case CODEC_TYPE_VIDEO:
+                val = enc->width;
+                break;
+            default:
+                val = 1;
+                break;
+            }
+            /* if no parameters supplied, then we should read it from
+               the stream */
+            if (val == 0)
+                break;
+        }
+        if (i == ic->nb_streams) {
+            ret = count;
+            break;
+        }
+
+        if (count == 0) {
+            /* open each codec */
+            for(i=0;i<ic->nb_streams;i++) {
+                st = ic->streams[i];
+                codec = avcodec_find_decoder(st->codec.codec_id);
+                if (codec == NULL) {
+                    ret = -1;
+                    goto the_end;
+                }
+                avcodec_open(&st->codec, codec);
+            }
+        }
+        pktl = av_mallocz(sizeof(AVPacketList));
+        if (!pktl) {
+            ret = -1;
+            break;
+        }
+
+        /* add the packet in the buffered packet list */
+        *ppktl = pktl;
+        ppktl = &pktl->next;
+
+        pkt = &pktl->pkt;
+        if (ic->format->read_packet(ic, pkt) < 0) {
+            ret = -1;
+            break;
+        }
+        st = ic->streams[pkt->stream_index];
+
+        /* decode the data and update codec parameters */
+        ptr = pkt->data;
+        size = pkt->size;
+        while (size > 0) {
+            switch(st->codec.codec_type) {
+            case CODEC_TYPE_VIDEO:
+                ret = avcodec_decode_video(&st->codec, &picture, &got_picture, ptr, size);
+                break;
+            case CODEC_TYPE_AUDIO:
+                ret = avcodec_decode_audio(&st->codec, samples, &got_picture, ptr, size);
+                break;
+            default:
+                ret = -1;
+                break;
+            }
+            if (ret < 0) {
+                ret = -1;
+                goto the_end;
+            }
+            if (got_picture)
+                break;
+            ptr += ret;
+            size -= ret;
+        }
+
+        count++;
+    }
+ the_end:
+    if (count > 0) {
+        /* close each codec */
+        for(i=0;i<ic->nb_streams;i++) {
+            st = ic->streams[i];
+            avcodec_close(&st->codec);
+        }
+    }
+    return ret;
+}
+
+
+void opt_input_file(const char *filename)
+{
+    AVFormatContext *ic;
+    AVFormatParameters params, *ap = &params;
+    URLFormat url_format;
+    AVFormat *fmt;
+    int err, i, ret;
+
+    ic = av_mallocz(sizeof(AVFormatContext));
+    strcpy(ic->filename, filename);
+    /* first format guess to know if we must open file */
+    fmt = file_format;
+    if (!fmt) 
+        fmt = guess_format(NULL, filename, NULL);
+    
+    if (fmt == NULL || !(fmt->flags & AVFMT_NOFILE)) {
+        /* open file */
+        if (url_fopen(&ic->pb, filename, URL_RDONLY) < 0) {
+            fprintf(stderr, "Could not open '%s'\n", filename);
+            exit(1);
+        }
+    
+        /* find format and set default parameters */
+        fmt = file_format;
+        err = url_getformat(url_fileno(&ic->pb), &url_format);
+        if (err >= 0) {
+            if (!fmt)
+                fmt = guess_format(url_format.format_name, NULL, NULL);
+            ap->sample_rate = url_format.sample_rate;
+            ap->frame_rate = url_format.frame_rate;
+            ap->channels = url_format.channels;
+            ap->width = url_format.width;
+            ap->height = url_format.height;
+            ap->pix_fmt = url_format.pix_fmt;
+        } else {
+            if (!fmt)
+                fmt = guess_format(NULL, filename, NULL);
+            memset(ap, 0, sizeof(*ap));
+        }
+    } else {
+        memset(ap, 0, sizeof(*ap));
+    }
+
+    if (!fmt || !fmt->read_header) {
+        fprintf(stderr, "%s: Unknown file format\n", filename);
+        exit(1);
+    }
+    ic->format = fmt;
+
+    /* get default parameters from command line */
+    if (!ap->sample_rate)
+        ap->sample_rate = audio_sample_rate;
+    if (!ap->channels)
+        ap->channels = audio_channels;
+
+    if (!ap->frame_rate)
+        ap->frame_rate = frame_rate;
+    if (!ap->width)
+        ap->width = frame_width;
+    if (!ap->height)
+        ap->height = frame_height;
+    
+    err = ic->format->read_header(ic, ap);
+    if (err < 0) {
+        fprintf(stderr, "%s: Error while parsing header\n", filename);
+        exit(1);
+    }
+    
+    /* If not enough info for the codecs, we decode the first frames
+       to get it. (used in mpeg case for example) */
+    ret = find_codec_parameters(ic);
+    if (ret < 0) {
+        fprintf(stderr, "%s: could not find codec parameters\n", filename);
+        exit(1);
+    }
+
+    /* update the current parameters so that they match the one of the input stream */
+    for(i=0;i<ic->nb_streams;i++) {
+        AVCodecContext *enc = &ic->streams[i]->codec;
+        switch(enc->codec_type) {
+        case CODEC_TYPE_AUDIO:
+            audio_channels = enc->channels;
+            audio_sample_rate = enc->sample_rate;
+            break;
+        case CODEC_TYPE_VIDEO:
+            frame_height = enc->height;
+            frame_width = enc->width;
+            frame_rate = enc->frame_rate;
+            break;
+        }
+    }
+    
+    input_files[nb_input_files] = ic;
+    /* dump the file content */
+    dump_format(ic, nb_input_files, filename, 0);
+    nb_input_files++;
+    file_format = NULL;
+}
+
+void opt_output_file(const char *filename)
+{
+    AVStream *st;
+    AVFormatContext *oc;
+    int use_video, use_audio, nb_streams;
+    int codec_id;
+
+    if (!strcmp(filename, "-"))
+        filename = "pipe:";
+
+    oc = av_mallocz(sizeof(AVFormatContext));
+
+    if (!file_format) {
+        file_format = guess_format(NULL, filename, NULL);
+        if (!file_format)
+            file_format = &mpeg_mux_format;
+    }
+    
+    oc->format = file_format;
+
+    if (!strcmp(file_format->name, "ffm") && 
+        strstart(filename, "http:", NULL)) {
+        /* special case for files sent to ffserver: we get the stream
+           parameters from ffserver */
+        if (read_ffserver_streams(oc, filename) < 0) {
+            fprintf(stderr, "Could not read stream parameters from '%s'\n", filename);
+            exit(1);
+        }
+    } else {
+        use_video = file_format->video_codec != CODEC_ID_NONE;
+        use_audio = file_format->audio_codec != CODEC_ID_NONE;
+        
+        if (audio_disable) {
+            use_audio = 0;
+        }
+        if (video_disable) {
+            use_video = 0;
+        }
+        
+        nb_streams = 0;
+        if (use_video) {
+            AVCodecContext *video_enc;
+            
+            st = av_mallocz(sizeof(AVStream));
+            if (!st) {
+                fprintf(stderr, "Could not alloc stream\n");
+                exit(1);
+            }
+            video_enc = &st->codec;
+
+            codec_id = file_format->video_codec;
+            if (video_codec_id != CODEC_ID_NONE)
+                codec_id = video_codec_id;
+
+            video_enc->codec_id = codec_id;
+            video_enc->codec_type = CODEC_TYPE_VIDEO;
+            
+            video_enc->bit_rate = video_bit_rate;
+            video_enc->frame_rate = frame_rate; 
+            
+            video_enc->width = frame_width;
+            video_enc->height = frame_height;
+            if (!intra_only)
+                video_enc->gop_size = gop_size;
+            else
+                video_enc->gop_size = 0;
+            if (video_qscale || same_quality) {
+                video_enc->flags |= CODEC_FLAG_QSCALE;
+                video_enc->quality = video_qscale;
+            }
+
+            oc->streams[nb_streams] = st;
+            nb_streams++;
+        }
+    
+        if (use_audio) {
+            AVCodecContext *audio_enc;
+
+            st = av_mallocz(sizeof(AVStream));
+            if (!st) {
+                fprintf(stderr, "Could not alloc stream\n");
+                exit(1);
+            }
+            audio_enc = &st->codec;
+            codec_id = file_format->audio_codec;
+            if (audio_codec_id != CODEC_ID_NONE)
+                codec_id = audio_codec_id;
+            audio_enc->codec_id = codec_id;
+            audio_enc->codec_type = CODEC_TYPE_AUDIO;
+            
+            audio_enc->bit_rate = audio_bit_rate;
+            audio_enc->sample_rate = audio_sample_rate;
+            audio_enc->channels = audio_channels;
+            oc->streams[nb_streams] = st;
+            nb_streams++;
+        }
+
+        oc->nb_streams = nb_streams;
+
+        if (!nb_streams) {
+            fprintf(stderr, "No audio or video selected\n");
+            exit(1);
+        }
+
+        if (str_title)
+            nstrcpy(oc->title, sizeof(oc->title), str_title);
+        if (str_author)
+            nstrcpy(oc->author, sizeof(oc->author), str_author);
+        if (str_copyright)
+            nstrcpy(oc->copyright, sizeof(oc->copyright), str_copyright);
+        if (str_comment)
+            nstrcpy(oc->comment, sizeof(oc->comment), str_comment);
+    }
+
+    output_files[nb_output_files] = oc;
+    /* dump the file content */
+    dump_format(oc, nb_output_files, filename, 1);
+    nb_output_files++;
+
+    strcpy(oc->filename, filename);
+    if (!(oc->format->flags & AVFMT_NOFILE)) {
+        /* test if it already exists to avoid loosing precious files */
+        if (!file_overwrite && 
+            (strchr(filename, ':') == NULL ||
+             strstart(filename, "file:", NULL))) {
+            if (url_exist(filename)) {
+                int c;
+                
+                printf("File '%s' already exists. Overwrite ? [y/N] ", filename);
+                fflush(stdout);
+                c = getchar();
+                if (toupper(c) != 'Y') {
+                    fprintf(stderr, "Not overwriting - exiting\n");
+                    exit(1);
+                }
+            }
+        }
+        
+        /* open the file */
+        if (url_fopen(&oc->pb, filename, URL_WRONLY) < 0) {
+            fprintf(stderr, "Could not open '%s'\n", filename);
+            exit(1);
+        }
+    }
+
+    /* reset some options */
+    file_format = NULL;
+    audio_disable = 0;
+    video_disable = 0;
+    audio_codec_id = CODEC_ID_NONE;
+    video_codec_id = CODEC_ID_NONE;
+}
+
+void show_formats(void)
+{
+    AVFormat *f;
+    URLProtocol *up;
+    AVCodec *p;
+    const char **pp;
+
+    printf("File formats:\n");
+    printf("  Encoding:");
+    for(f = first_format; f != NULL; f = f->next) {
+        if (f->write_header)
+            printf(" %s", f->name);
+    }
+    printf("\n");
+    printf("  Decoding:");
+    for(f = first_format; f != NULL; f = f->next) {
+        if (f->read_header)
+            printf(" %s", f->name);
+    }
+    printf("\n");
+
+    printf("Codecs:\n");
+    printf("  Encoders:");
+    for(p = first_avcodec; p != NULL; p = p->next) {
+        if (p->encode)
+            printf(" %s", p->name);
+    }
+    printf("\n");
+
+    printf("  Decoders:");
+    for(p = first_avcodec; p != NULL; p = p->next) {
+        if (p->decode)
+            printf(" %s", p->name);
+    }
+    printf("\n");
+
+    printf("Supported file protocols:");
+    for(up = first_protocol; up != NULL; up = up->next)
+        printf(" %s:", up->name);
+    printf("\n");
+    
+    printf("Frame size abbreviations: sqcif qcif cif 4cif\n");
+    printf("Motion estimation methods:");
+    pp = motion_str;
+    while (*pp) {
+        printf(" %s", *pp);
+        if ((pp - motion_str) == ME_ZERO) 
+            printf("(fastest)");
+        else if ((pp - motion_str) == ME_FULL) 
+            printf("(slowest)");
+        else if ((pp - motion_str) == ME_LOG) 
+            printf("(default)");
+        pp++;
+    }
+    printf("\n");
+    exit(1);
+}
+
+void show_help(void)
+{
+    const OptionDef *po;
+    int i, expert;
+
+    printf("ffmpeg version " FFMPEG_VERSION ", Copyright (c) 2000,2001 Gerard Lantau\n"
+           "usage: ffmpeg [[options] -i input_file]... {[options] outfile}...\n"
+           "Hyper fast MPEG1/MPEG4/H263/RV and AC3/MPEG audio encoder\n"
+           "\n"
+           "Main options are:\n");
+    for(i=0;i<2;i++) {
+        if (i == 1)
+            printf("\nAdvanced options are:\n");
+        for(po = options; po->name != NULL; po++) {
+            char buf[64];
+            expert = (po->flags & OPT_EXPERT) != 0;
+            if (expert == i) {
+                strcpy(buf, po->name);
+                if (po->flags & HAS_ARG) {
+                    strcat(buf, " ");
+                    strcat(buf, po->argname);
+                }
+                printf("-%-17s  %s\n", buf, po->help);
+            }
+        }
+    }
+
+    exit(1);
+}
+
+const OptionDef options[] = {
+    { "L", 0, {show_licence}, "show license" },
+    { "h", 0, {show_help}, "show help" },
+    { "formats", 0, {show_formats}, "show available formats, codecs, protocols, ..." },
+    { "f", HAS_ARG, {opt_format}, "force format", "fmt" },
+    { "i", HAS_ARG, {opt_input_file}, "input file name", "filename" },
+    { "y", OPT_BOOL, {int_arg:&file_overwrite}, "overwrite output files" },
+    { "map", HAS_ARG | OPT_EXPERT, {opt_map}, "set input stream mapping", "file:stream" },
+    { "t", HAS_ARG, {opt_recording_time}, "set the recording time", "duration" },
+    { "title", HAS_ARG | OPT_STRING, {str_arg: &str_title}, "set the title", "string" },
+    { "author", HAS_ARG | OPT_STRING, {str_arg: &str_author}, "set the author", "string" },
+    { "copyright", HAS_ARG | OPT_STRING, {str_arg: &str_copyright}, "set the copyright", "string" },
+    { "comment", HAS_ARG | OPT_STRING, {str_arg: &str_comment}, "set the comment", "string" },
+    /* video options */
+    { "b", HAS_ARG, {opt_video_bitrate}, "set video bitrate (in kbit/s)", "bitrate" },
+    { "r", HAS_ARG, {opt_frame_rate}, "set frame rate (in Hz)", "rate" },
+    { "s", HAS_ARG, {opt_frame_size}, "set frame size (WxH or abbreviation)", "size" },
+    { "g", HAS_ARG | OPT_EXPERT, {opt_gop_size}, "set the group of picture size", "gop_size" },
+    { "intra", OPT_BOOL | OPT_EXPERT, {int_arg: &intra_only}, "use only intra frames"},
+    { "vn", OPT_BOOL, {int_arg: &video_disable}, "disable video" },
+    { "qscale", HAS_ARG | OPT_EXPERT, {opt_qscale}, "use fixed video quantiser scale (VBR)", "q" },
+    { "vd", HAS_ARG | OPT_EXPERT, {opt_video_device}, "set video device", "device" },
+    { "vcodec", HAS_ARG | OPT_EXPERT, {opt_video_codec}, "force video codec", "codec" },
+    { "me", HAS_ARG | OPT_EXPERT, {opt_motion_estimation}, "set motion estimation method", 
+      "method" },
+    { "sameq", OPT_BOOL, {int_arg: &same_quality}, 
+      "use same video quality as source (implies VBR)" },
+    /* audio options */
+    { "ab", HAS_ARG, {opt_audio_bitrate}, "set audio bitrate (in kbit/s)", "bitrate", },
+    { "ar", HAS_ARG, {opt_audio_rate}, "set audio sampling rate (in Hz)", "rate" },
+    { "ac", HAS_ARG, {opt_audio_channels}, "set number of audio channels", "channels" },
+    { "an", OPT_BOOL, {int_arg: &audio_disable}, "disable audio" },
+    { "ad", HAS_ARG | OPT_EXPERT, {opt_audio_device}, "set audio device", "device" },
+    { "acodec", HAS_ARG | OPT_EXPERT, {opt_audio_codec}, "force audio codec", "codec" },
+
+    { NULL, },
+};
+
+int main(int argc, char **argv)
+{
+    int optindex, i;
+    const char *opt, *arg;
+    const OptionDef *po;
+    
+    register_all();
+
+    if (argc <= 1)
+        show_help();
+
+    optindex = 1;
+    while (optindex < argc) {
+        opt = argv[optindex++];
+        
+        if (opt[0] == '-' && opt[1] != '\0') {
+            po = options;
+            while (po->name != NULL) {
+                if (!strcmp(opt + 1, po->name))
+                    break;
+                po++;
+            }
+            if (!po->name) {
+                fprintf(stderr, "%s: unrecognized option '%s'\n", argv[0], opt);
+                exit(1);
+            }
+            arg = NULL;
+            if (po->flags & HAS_ARG)
+                arg = argv[optindex++];
+            if (po->flags & OPT_STRING) {
+                char *str;
+                str = strdup(arg);
+                *po->u.str_arg = str;
+            } else if (po->flags & OPT_BOOL) {
+                *po->u.int_arg = 1;
+            } else {
+                po->u.func_arg(arg);
+            }
+        } else {
+            opt_output_file(opt);
+        }
+    }
+
+
+    if (nb_input_files == 0) {
+        if (nb_output_files != 1) {
+            fprintf(stderr, "Only one output file supported when grabbing\n");
+            exit(1);
+        }
+        av_grab(output_files[0]);
+    } else {
+        if (nb_output_files <= 0) {
+            fprintf(stderr, "Must supply at least one output file\n");
+            exit(1);
+        }
+        av_encode(output_files, nb_output_files, input_files, nb_input_files, 
+                  stream_maps, nb_stream_maps);
+    }
+
+    /* close files */
+    for(i=0;i<nb_output_files;i++) {
+        if (!(output_files[i]->format->flags & AVFMT_NOFILE)) 
+            url_fclose(&output_files[i]->pb);
+    }
+    for(i=0;i<nb_input_files;i++) {
+        if (!(input_files[i]->format->flags & AVFMT_NOFILE)) 
+            url_fclose(&input_files[i]->pb);
+    }
+
+    return 0;
+}

ffserver.c

+/*
+ * Multiple format streaming server
+ * Copyright (c) 2000,2001 Gerard Lantau.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <stdarg.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <netinet/in.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/poll.h>
+#include <errno.h>
+#include <sys/time.h>
+#include <time.h>
+#include <getopt.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <ctype.h>
+#include <signal.h>
+
+#include "avformat.h"
+
+/* maximum number of simultaneous HTTP connections */
+#define HTTP_MAX_CONNECTIONS 2000
+
+enum HTTPState {
+    HTTPSTATE_WAIT_REQUEST,
+    HTTPSTATE_SEND_HEADER,
+    HTTPSTATE_SEND_DATA_HEADER,
+    HTTPSTATE_SEND_DATA,
+    HTTPSTATE_SEND_DATA_TRAILER,
+    HTTPSTATE_RECEIVE_DATA,
+    HTTPSTATE_WAIT_FEED,
+};
+
+const char *http_state[] = {
+    "WAIT_REQUEST",
+    "SEND_HEADER",
+    "SEND_DATA_HEADER",
+    "SEND_DATA",
+    "SEND_DATA_TRAILER",
+    "RECEIVE_DATA",
+    "WAIT_FEED",
+};
+
+#define IOBUFFER_MAX_SIZE 16384
+
+/* coef for exponential mean for bitrate estimation in statistics */
+#define AVG_COEF 0.9
+
+/* timeouts are in ms */
+#define REQUEST_TIMEOUT (15 * 1000)
+#define SYNC_TIMEOUT (10 * 1000)
+
+/* context associated with one connection */
+typedef struct HTTPContext {
+    enum HTTPState state;
+    int fd; /* socket file descriptor */
+    struct sockaddr_in from_addr; /* origin */
+    struct pollfd *poll_entry; /* used when polling */
+    long timeout;
+    UINT8 buffer[IOBUFFER_MAX_SIZE];
+    UINT8 *buffer_ptr, *buffer_end;
+    int http_error;
+    struct HTTPContext *next;
+    int got_key_frame[MAX_STREAMS]; /* for each type */
+    INT64 data_count;
+    /* feed input */
+    int feed_fd;
+    /* input format handling */
+    AVFormatContext *fmt_in;
+    /* output format handling */
+    struct FFStream *stream;
+    AVFormatContext fmt_ctx;
+    int last_packet_sent; /* true if last data packet was sent */
+} HTTPContext;
+
+/* each generated stream is described here */
+enum StreamType {
+    STREAM_TYPE_LIVE,
+    STREAM_TYPE_STATUS,
+};
+
+/* description of each stream of the ffserver.conf file */
+typedef struct FFStream {
+    enum StreamType stream_type;
+    char filename[1024];     /* stream filename */
+    struct FFStream *feed;
+    AVFormat *fmt;
+    int nb_streams;
+    AVStream *streams[MAX_STREAMS];
+    int feed_streams[MAX_STREAMS]; /* index of streams in the feed */
+    char feed_filename[1024]; /* file name of the feed storage, or
+                                 input file name for a stream */
+    struct FFStream *next;
+    /* feed specific */
+    int feed_opened;     /* true if someone if writing to feed */
+    int is_feed;         /* true if it is a feed */
+    INT64 feed_max_size;      /* maximum storage size */
+    INT64 feed_write_index;   /* current write position in feed (it wraps round) */
+    INT64 feed_size;          /* current size of feed */
+    struct FFStream *next_feed;
+} FFStream;
+
+typedef struct FeedData {
+    long long data_count;
+    float avg_frame_size;   /* frame size averraged over last frames with exponential mean */
+} FeedData;
+
+struct sockaddr_in my_addr;
+char logfilename[1024];
+HTTPContext *first_http_ctx;
+FFStream *first_feed;   /* contains only feeds */
+FFStream *first_stream; /* contains all streams, including feeds */
+
+static int handle_http(HTTPContext *c, long cur_time);
+static int http_parse_request(HTTPContext *c);
+static int http_send_data(HTTPContext *c);
+static void compute_stats(HTTPContext *c);
+static int open_input_stream(HTTPContext *c, const char *info);
+static int http_start_receive_data(HTTPContext *c);
+static int http_receive_data(HTTPContext *c);
+
+int nb_max_connections;
+int nb_connections;
+
+static long gettime_ms(void)
+{
+    struct timeval tv;
+
+    gettimeofday(&tv,NULL);
+    return (long long)tv.tv_sec * 1000 + (tv.tv_usec / 1000);
+}
+
+static FILE *logfile = NULL;
+
+static void http_log(char *fmt, ...)
+{
+    va_list ap;
+    va_start(ap, fmt);
+    
+    if (logfile)
+        vfprintf(logfile, fmt, ap);
+    va_end(ap);
+}
+
+/* main loop of the http server */
+static int http_server(struct sockaddr_in my_addr)
+{
+    int server_fd, tmp, ret;
+    struct sockaddr_in from_addr;
+    struct pollfd poll_table[HTTP_MAX_CONNECTIONS + 1], *poll_entry;
+    HTTPContext *c, **cp;
+    long cur_time;
+
+    server_fd = socket(AF_INET,SOCK_STREAM,0);
+    if (server_fd < 0) {
+        perror ("socket");
+        return -1;
+    }
+        
+    tmp = 1;
+    setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR, &tmp, sizeof(tmp));
+
+    if (bind (server_fd, (struct sockaddr *) &my_addr, sizeof (my_addr)) < 0) {
+        perror ("bind");
+        close(server_fd);
+        return -1;
+    }
+  
+    if (listen (server_fd, 5) < 0) {
+        perror ("listen");
+        close(server_fd);
+        return -1;
+    }
+
+    http_log("ffserver started.\n");
+
+    fcntl(server_fd, F_SETFL, O_NONBLOCK);
+    first_http_ctx = NULL;
+    nb_connections = 0;
+    first_http_ctx = NULL;
+    for(;;) {
+        poll_entry = poll_table;
+        poll_entry->fd = server_fd;
+        poll_entry->events = POLLIN;
+        poll_entry++;
+
+        /* wait for events on each HTTP handle */
+        c = first_http_ctx;
+        while (c != NULL) {
+            int fd;
+            fd = c->fd;
+            switch(c->state) {
+            case HTTPSTATE_WAIT_REQUEST:
+                c->poll_entry = poll_entry;
+                poll_entry->fd = fd;
+                poll_entry->events = POLLIN;
+                poll_entry++;
+                break;
+            case HTTPSTATE_SEND_HEADER:
+            case HTTPSTATE_SEND_DATA_HEADER:
+            case HTTPSTATE_SEND_DATA:
+            case HTTPSTATE_SEND_DATA_TRAILER:
+                c->poll_entry = poll_entry;
+                poll_entry->fd = fd;
+                poll_entry->events = POLLOUT;
+                poll_entry++;
+                break;
+            case HTTPSTATE_RECEIVE_DATA:
+                c->poll_entry = poll_entry;
+                poll_entry->fd = fd;
+                poll_entry->events = POLLIN;
+                poll_entry++;
+                break;
+            case HTTPSTATE_WAIT_FEED:
+                /* need to catch errors */
+                c->poll_entry = poll_entry;
+                poll_entry->fd = fd;
+                poll_entry->events = 0;
+                poll_entry++;
+                break;
+            default:
+                c->poll_entry = NULL;
+                break;
+            }
+            c = c->next;
+        }
+
+        /* wait for an event on one connection. We poll at least every
+           second to handle timeouts */
+        do {
+            ret = poll(poll_table, poll_entry - poll_table, 1000);
+        } while (ret == -1);
+        
+        cur_time = gettime_ms();
+
+        /* now handle the events */
+
+        cp = &first_http_ctx;
+        while ((*cp) != NULL) {
+            c = *cp;
+            if (handle_http (c, cur_time) < 0) {
+                /* close and free the connection */
+                close(c->fd);
+                if (c->fmt_in)
+                    av_close_input_file(c->fmt_in);
+                *cp = c->next;
+                free(c);
+                nb_connections--;
+            } else {
+                cp = &c->next;
+            }
+        }
+
+        /* new connection request ? */
+        poll_entry = poll_table;
+        if (poll_entry->revents & POLLIN) {
+            int fd, len;
+
+            len = sizeof(from_addr);
+            fd = accept(server_fd, (struct sockaddr *)&from_addr, 
+                        &len);
+            if (fd >= 0) {
+                fcntl(fd, F_SETFL, O_NONBLOCK);
+                /* XXX: should output a warning page when coming
+                   close to the connection limit */
+                if (nb_connections >= nb_max_connections) {
+                    close(fd);
+                } else {
+                    /* add a new connection */
+                    c = av_mallocz(sizeof(HTTPContext));
+                    c->next = first_http_ctx;
+                    first_http_ctx = c;
+                    c->fd = fd;
+                    c->poll_entry = NULL;
+                    c->from_addr = from_addr;
+                    c->state = HTTPSTATE_WAIT_REQUEST;
+                    c->buffer_ptr = c->buffer;
+                    c->buffer_end = c->buffer + IOBUFFER_MAX_SIZE;
+                    c->timeout = cur_time + REQUEST_TIMEOUT;
+                    nb_connections++;
+                }
+            }
+        }
+        poll_entry++;
+    }
+}
+
+static int handle_http(HTTPContext *c, long cur_time)
+{
+    int len;
+    
+    switch(c->state) {
+    case HTTPSTATE_WAIT_REQUEST:
+        /* timeout ? */
+        if ((c->timeout - cur_time) < 0)
+            return -1;
+        if (c->poll_entry->revents & (POLLERR | POLLHUP))
+            return -1;
+
+        /* no need to read if no events */
+        if (!(c->poll_entry->revents & POLLIN))
+            return 0;
+        /* read the data */
+        len = read(c->fd, c->buffer_ptr, c->buffer_end - c->buffer_ptr);
+        if (len < 0) {
+            if (errno != EAGAIN && errno != EINTR)
+                return -1;
+        } else if (len == 0) {
+            return -1;
+        } else {
+            /* search for end of request. XXX: not fully correct since garbage could come after the end */
+            UINT8 *ptr;
+            c->buffer_ptr += len;
+            ptr = c->buffer_ptr;
+            if ((ptr >= c->buffer + 2 && !memcmp(ptr-2, "\n\n", 2)) ||
+                (ptr >= c->buffer + 4 && !memcmp(ptr-4, "\r\n\r\n", 4))) {
+                /* request found : parse it and reply */
+                if (http_parse_request(c) < 0)
+                    return -1;
+            } else if (ptr >= c->buffer_end) {
+                /* request too long: cannot do anything */
+                return -1;
+            }
+        }
+        break;
+
+    case HTTPSTATE_SEND_HEADER:
+        if (c->poll_entry->revents & (POLLERR | POLLHUP))
+            return -1;
+
+        /* no need to read if no events */
+        if (!(c->poll_entry->revents & POLLOUT))
+            return 0;
+        len = write(c->fd, c->buffer_ptr, c->buffer_end - c->buffer_ptr);
+        if (len < 0) {
+            if (errno != EAGAIN && errno != EINTR) {
+                /* error : close connection */
+                return -1;
+            }
+        } else {
+            c->buffer_ptr += len;
+            if (c->buffer_ptr >= c->buffer_end) {
+                /* if error, exit */
+                if (c->http_error)
+                    return -1;
+                /* all the buffer was send : synchronize to the incoming stream */
+                c->state = HTTPSTATE_SEND_DATA_HEADER;
+                c->buffer_ptr = c->buffer_end = c->buffer;
+            }
+        }
+        break;
+
+    case HTTPSTATE_SEND_DATA:
+    case HTTPSTATE_SEND_DATA_HEADER:
+    case HTTPSTATE_SEND_DATA_TRAILER:
+        /* no need to read if no events */
+        if (c->poll_entry->revents & (POLLERR | POLLHUP))
+            return -1;
+        
+        if (!(c->poll_entry->revents & POLLOUT))
+            return 0;
+        if (http_send_data(c) < 0)
+            return -1;
+        break;
+    case HTTPSTATE_RECEIVE_DATA:
+        /* no need to read if no events */
+        if (c->poll_entry->revents & (POLLERR | POLLHUP))
+            return -1;
+        if (!(c->poll_entry->revents & POLLIN))
+            return 0;
+        if (http_receive_data(c) < 0)
+            return -1;
+        break;
+    case HTTPSTATE_WAIT_FEED:
+        /* no need to read if no events */
+        if (c->poll_entry->revents & (POLLERR | POLLHUP))
+            return -1;
+
+        /* nothing to do, we'll be waken up by incoming feed packets */
+        break;
+    default:
+        return -1;
+    }
+    return 0;
+}
+
+/* parse http request and prepare header */
+static int http_parse_request(HTTPContext *c)
+{
+    char *p;
+    int post;
+    char cmd[32];
+    char info[1024], *filename;
+    char url[1024], *q;
+    char protocol[32];
+    char msg[1024];
+    const char *mime_type;
+    FFStream *stream;
+
+    p = c->buffer;
+    q = cmd;
+    while (!isspace(*p) && *p != '\0') {
+        if ((q - cmd) < sizeof(cmd) - 1)
+            *q++ = *p;
+        p++;
+    }
+    *q = '\0';
+    if (!strcmp(cmd, "GET"))
+        post = 0;
+    else if (!strcmp(cmd, "POST"))
+        post = 1;
+    else
+        return -1;
+
+    while (isspace(*p)) p++;
+    q = url;
+    while (!isspace(*p) && *p != '\0') {
+        if ((q - url) < sizeof(url) - 1)
+            *q++ = *p;
+        p++;
+    }
+    *q = '\0';
+
+    while (isspace(*p)) p++;
+    q = protocol;
+    while (!isspace(*p) && *p != '\0') {
+        if ((q - protocol) < sizeof(protocol) - 1)
+            *q++ = *p;
+        p++;
+    }
+    *q = '\0';
+    if (strcmp(protocol, "HTTP/1.0") && strcmp(protocol, "HTTP/1.1"))
+        return -1;
+    
+    /* find the filename and the optional info string in the request */
+    p = url;
+    if (*p == '/')
+        p++;
+    filename = p;
+    p = strchr(p, '?');
+    if (p) {
+        strcpy(info, p);
+        *p = '\0';
+    } else {
+        info[0] = '\0';
+    }
+
+    stream = first_stream;
+    while (stream != NULL) {
+        if (!strcmp(stream->filename, filename))
+            break;
+        stream = stream->next;
+    }
+    if (stream == NULL) {
+        sprintf(msg, "File '%s' not found", url);
+        goto send_error;
+    }
+    c->stream = stream;
+    
+    /* should do it after so that the size can be computed */
+    {
+        char buf1[32], buf2[32], *p;
+        time_t ti;
+        /* XXX: reentrant function ? */
+        p = inet_ntoa(c->from_addr.sin_addr);
+        strcpy(buf1, p);
+        ti = time(NULL);
+        p = ctime(&ti);
+        strcpy(buf2, p);
+        p = buf2 + strlen(p) - 1;
+        if (*p == '\n')
+            *p = '\0';
+        http_log("%s - - [%s] \"%s %s %s\" %d %d\n", 
+                 buf1, buf2, cmd, url, protocol, 200, 1024);
+    }
+
+    /* XXX: add there authenticate and IP match */
+
+    if (post) {
+        /* if post, it means a feed is being sent */
+        if (!stream->is_feed) {
+            sprintf(msg, "POST command not handled");
+            goto send_error;
+        }
+        if (http_start_receive_data(c) < 0) {
+            sprintf(msg, "could not open feed");
+            goto send_error;
+        }
+        c->http_error = 0;
+        c->state = HTTPSTATE_RECEIVE_DATA;
+        return 0;
+    }
+
+    if (c->stream->stream_type == STREAM_TYPE_STATUS)
+        goto send_stats;
+
+    /* open input stream */
+    if (open_input_stream(c, info) < 0) {
+        sprintf(msg, "Input stream corresponding to '%s' not found", url);
+        goto send_error;
+    }
+
+    /* prepare http header */
+    q = c->buffer;
+    q += sprintf(q, "HTTP/1.0 200 OK\r\n");
+    mime_type = c->stream->fmt->mime_type;
+    if (!mime_type)
+        mime_type = "application/x-octet_stream";
+    q += sprintf(q, "Content-type: %s\r\n", mime_type);
+    q += sprintf(q, "Pragma: no-cache\r\n");
+
+    /* for asf, we need extra headers */
+    if (!strcmp(c->stream->fmt->name,"asf")) {
+        q += sprintf(q, "Pragma: features=broadcast\r\n");
+    }
+    q += sprintf(q, "\r\n");
+    
+    /* prepare output buffer */
+    c->http_error = 0;
+    c->buffer_ptr = c->buffer;
+    c->buffer_end = q;
+    c->state = HTTPSTATE_SEND_HEADER;
+    return 0;
+ send_error:
+    c->http_error = 404;
+    q = c->buffer;
+    q += sprintf(q, "HTTP/1.0 404 Not Found\r\n");
+    q += sprintf(q, "Content-type: %s\r\n", "text/html");
+    q += sprintf(q, "\r\n");
+    q += sprintf(q, "<HTML>\n");
+    q += sprintf(q, "<HEAD><TITLE>404 Not Found</TITLE></HEAD>\n");
+    q += sprintf(q, "<BODY>%s</BODY>\n", msg);
+    q += sprintf(q, "</HTML>\n");
+
+    /* prepare output buffer */
+    c->buffer_ptr = c->buffer;
+    c->buffer_end = q;
+    c->state = HTTPSTATE_SEND_HEADER;
+    return 0;
+ send_stats:
+    compute_stats(c);
+    c->http_error = 200; /* horrible : we use this value to avoid
+                            going to the send data state */
+    c->state = HTTPSTATE_SEND_HEADER;
+    return 0;
+}
+
+static void compute_stats(HTTPContext *c)
+{
+    HTTPContext *c1;
+    FFStream *stream;
+    char *q, *p;
+    time_t ti;
+    int i;
+
+    q = c->buffer;
+    q += sprintf(q, "HTTP/1.0 200 OK\r\n");
+    q += sprintf(q, "Content-type: %s\r\n", "text/html");
+    q += sprintf(q, "Pragma: no-cache\r\n");
+    q += sprintf(q, "\r\n");
+    
+    q += sprintf(q, "<HEAD><TITLE>FFServer Status</TITLE></HEAD>\n<BODY>");
+    q += sprintf(q, "<H1>FFServer Status</H1>\n");
+    /* format status */
+    q += sprintf(q, "<H1>Available Streams</H1>\n");
+    q += sprintf(q, "<TABLE>\n");
+    q += sprintf(q, "<TR><TD>Path<TD>Format<TD>Bit rate (kbits/s)<TD>Video<TD>Audio<TD>Feed\n");
+    stream = first_stream;
+    while (stream != NULL) {
+        q += sprintf(q, "<TR><TD><A HREF=\"/%s\">%s</A> ", 
+                     stream->filename, stream->filename);
+        switch(stream->stream_type) {
+        case STREAM_TYPE_LIVE:
+            {
+                int audio_bit_rate = 0;
+                int video_bit_rate = 0;
+
+                for(i=0;i<stream->nb_streams;i++) {
+                    AVStream *st = stream->streams[i];
+                    switch(st->codec.codec_type) {
+                    case CODEC_TYPE_AUDIO:
+                        audio_bit_rate += st->codec.bit_rate;
+                        break;
+                    case CODEC_TYPE_VIDEO:
+                        video_bit_rate += st->codec.bit_rate;
+                        break;
+                    }
+                }
+                q += sprintf(q, "<TD> %s <TD> %d <TD> %d <TD> %d", 
+                             stream->fmt->name,
+                             (audio_bit_rate + video_bit_rate) / 1000,
+                             video_bit_rate / 1000, audio_bit_rate / 1000);
+                if (stream->feed) {
+                    q += sprintf(q, "<TD>%s", stream->feed->filename);
+                } else {
+                    q += sprintf(q, "<TD>%s", stream->feed_filename);
+                }
+                q += sprintf(q, "\n");
+            }
+            break;
+        default:
+            q += sprintf(q, "<TD> - <TD> - <TD> - <TD> -\n");
+            break;
+        }
+        stream = stream->next;
+    }
+    q += sprintf(q, "</TABLE>\n");
+    
+#if 0
+    {
+        float avg;
+        AVCodecContext *enc;
+        char buf[1024];
+        
+        /* feed status */
+        stream = first_feed;
+        while (stream != NULL) {
+            q += sprintf(q, "<H1>Feed '%s'</H1>\n", stream->filename);
+            q += sprintf(q, "<TABLE>\n");
+            q += sprintf(q, "<TR><TD>Parameters<TD>Frame count<TD>Size<TD>Avg bitrate (kbits/s)\n");
+            for(i=0;i<stream->nb_streams;i++) {
+                AVStream *st = stream->streams[i];
+                FeedData *fdata = st->priv_data;
+                enc = &st->codec;
+            
+                avcodec_string(buf, sizeof(buf), enc);
+                avg = fdata->avg_frame_size * (float)enc->rate * 8.0;
+                if (enc->codec->type == CODEC_TYPE_AUDIO && enc->frame_size > 0)
+                    avg /= enc->frame_size;
+                q += sprintf(q, "<TR><TD>%s <TD> %d <TD> %Ld <TD> %0.1f\n", 
+                             buf, enc->frame_number, fdata->data_count, avg / 1000.0);
+            }
+            q += sprintf(q, "</TABLE>\n");
+            stream = stream->next_feed;
+        }
+    }
+#endif
+
+    /* connection status */
+    q += sprintf(q, "<H1>Connection Status</H1>\n");
+
+    q += sprintf(q, "Number of connections: %d / %d<BR>\n",
+                 nb_connections, nb_max_connections);
+
+    q += sprintf(q, "<TABLE>\n");
+    q += sprintf(q, "<TR><TD>#<TD>File<TD>IP<TD>State<TD>Size\n");
+    c1 = first_http_ctx;
+    i = 0;
+    while (c1 != NULL) {
+        i++;
+        p = inet_ntoa(c1->from_addr.sin_addr);
+        q += sprintf(q, "<TR><TD><B>%d</B><TD>%s%s <TD> %s <TD> %s <TD> %Ld\n", 
+                     i, c1->stream->filename, 
+                     c1->state == HTTPSTATE_RECEIVE_DATA ? "(input)" : "",
+                     p, 
+                     http_state[c1->state],
+                     c1->data_count);
+        c1 = c1->next;
+    }
+    q += sprintf(q, "</TABLE>\n");
+    
+    /* date */
+    ti = time(NULL);
+    p = ctime(&ti);
+    q += sprintf(q, "<HR>Generated at %s", p);
+    q += sprintf(q, "</BODY>\n</HTML>\n");
+
+    c->buffer_ptr = c->buffer;
+    c->buffer_end = q;
+}
+
+
+static void http_write_packet(void *opaque, 
+                              unsigned char *buf, int size)
+{
+    HTTPContext *c = opaque;
+    if (size > IOBUFFER_MAX_SIZE)
+        abort();
+    memcpy(c->buffer, buf, size);
+    c->buffer_ptr = c->buffer;
+    c->buffer_end = c->buffer + size;
+}
+
+static int open_input_stream(HTTPContext *c, const char *info)
+{
+    char buf[128];
+    char input_filename[1024];
+    AVFormatContext *s;
+    int buf_size;
+    INT64 stream_pos;
+
+    /* find file name */
+    if (c->stream->feed) {
+        strcpy(input_filename, c->stream->feed->feed_filename);
+        buf_size = FFM_PACKET_SIZE;
+        /* compute position (absolute time) */
+        if (find_info_tag(buf, sizeof(buf), "date", info)) {
+            stream_pos = parse_date(buf, 0);
+        } else {
+            stream_pos = gettime();
+        }
+    } else {
+        strcpy(input_filename, c->stream->feed_filename);
+        buf_size = 0;
+        /* compute position (relative time) */
+        if (find_info_tag(buf, sizeof(buf), "date", info)) {
+            stream_pos = parse_date(buf, 1);
+        } else {
+            stream_pos = 0;
+        }
+    }
+    if (input_filename[0] == '\0')
+        return -1;
+
+    /* open stream */
+    s = av_open_input_file(input_filename, buf_size);
+    if (!s)
+        return -1;
+    c->fmt_in = s;
+
+    if (c->fmt_in->format->read_seek) {
+        c->fmt_in->format->read_seek(c->fmt_in, stream_pos);
+    }
+    
+    //    printf("stream %s opened pos=%0.6f\n", input_filename, stream_pos / 1000000.0);
+    return 0;
+}
+
+static int http_prepare_data(HTTPContext *c)
+{
+    int i;
+
+    switch(c->state) {
+    case HTTPSTATE_SEND_DATA_HEADER:
+        memset(&c->fmt_ctx, 0, sizeof(c->fmt_ctx));
+        if (c->stream->feed) {
+            /* open output stream by using specified codecs */
+            c->fmt_ctx.format = c->stream->fmt;
+            c->fmt_ctx.nb_streams = c->stream->nb_streams;
+            for(i=0;i<c->fmt_ctx.nb_streams;i++) {
+                AVStream *st;
+                st = av_mallocz(sizeof(AVStream));
+                c->fmt_ctx.streams[i] = st;
+                memcpy(st, c->stream->streams[i], sizeof(AVStream));
+                st->codec.frame_number = 0; /* XXX: should be done in
+                                               AVStream, not in codec */
+                c->got_key_frame[i] = 0;
+            }
+        } else {
+            /* open output stream by using codecs in specified file */
+            c->fmt_ctx.format = c->stream->fmt;
+            c->fmt_ctx.nb_streams = c->fmt_in->nb_streams;
+            for(i=0;i<c->fmt_ctx.nb_streams;i++) {
+                AVStream *st;
+                st = av_mallocz(sizeof(AVStream));
+                c->fmt_ctx.streams[i] = st;
+                memcpy(st, c->fmt_in->streams[i], sizeof(AVStream));
+                st->codec.frame_number = 0; /* XXX: should be done in
+                                               AVStream, not in codec */
+                c->got_key_frame[i] = 0;
+            }
+        }
+        init_put_byte(&c->fmt_ctx.pb, c->buffer, IOBUFFER_MAX_SIZE,
+                      1, c, NULL, http_write_packet, NULL);
+        c->fmt_ctx.pb.is_streamed = 1;
+        /* prepare header */
+        c->fmt_ctx.format->write_header(&c->fmt_ctx);
+        c->state = HTTPSTATE_SEND_DATA;
+        c->last_packet_sent = 0;
+        break;
+    case HTTPSTATE_SEND_DATA:
+        /* find a new packet */
+#if 0
+        fifo_total_size = http_fifo_write_count - c->last_http_fifo_write_count;
+        if (fifo_total_size >= ((3 * FIFO_MAX_SIZE) / 4)) {
+            /* overflow : resync. We suppose that wptr is at this
+               point a pointer to a valid packet */
+            c->rptr = http_fifo.wptr;
+            for(i=0;i<c->fmt_ctx.nb_streams;i++) {
+                c->got_key_frame[i] = 0;
+            }
+        }
+        
+        start_rptr = c->rptr;
+        if (fifo_read(&http_fifo, (UINT8 *)&hdr, sizeof(hdr), &c->rptr) < 0)
+            return 0;
+        payload_size = ntohs(hdr.payload_size);
+        payload = malloc(payload_size);
+        if (fifo_read(&http_fifo, payload, payload_size, &c->rptr) < 0) {
+            /* cannot read all the payload */
+            free(payload);
+            c->rptr = start_rptr;
+            return 0;
+        }
+        
+        c->last_http_fifo_write_count = http_fifo_write_count - 
+            fifo_size(&http_fifo, c->rptr);
+        
+        if (c->stream->stream_type != STREAM_TYPE_MASTER) {
+            /* test if the packet can be handled by this format */
+            ret = 0;
+            for(i=0;i<c->fmt_ctx.nb_streams;i++) {
+                AVStream *st = c->fmt_ctx.streams[i];
+                if (test_header(&hdr, &st->codec)) {
+                    /* only begin sending when got a key frame */
+                    if (st->codec.key_frame)
+                        c->got_key_frame[i] = 1;
+                    if (c->got_key_frame[i]) {
+                        ret = c->fmt_ctx.format->write_packet(&c->fmt_ctx, i,
+                                                                   payload, payload_size);
+                    }
+                    break;
+                }
+            }
+            if (ret) {
+                /* must send trailer now */
+                c->state = HTTPSTATE_SEND_DATA_TRAILER;
+            }
+        } else {
+            /* master case : send everything */
+            char *q;
+            q = c->buffer;
+            memcpy(q, &hdr, sizeof(hdr));
+            q += sizeof(hdr);
+            memcpy(q, payload, payload_size);
+            q += payload_size;
+            c->buffer_ptr = c->buffer;
+            c->buffer_end = q;
+        }
+        free(payload);
+#endif
+        {
+            AVPacket pkt;
+
+            /* read a packet from the input stream */
+            if (c->stream->feed) {
+                ffm_set_write_index(c->fmt_in, 
+                                    c->stream->feed->feed_write_index,
+                                    c->stream->feed->feed_size);
+            }
+            if (av_read_packet(c->fmt_in, &pkt) < 0) {
+                if (c->stream->feed && c->stream->feed->feed_opened) {
+                    /* if coming from feed, it means we reached the end of the
+                       ffm file, so must wait for more data */
+                    c->state = HTTPSTATE_WAIT_FEED;
+                    return 1; /* state changed */
+                } else {
+                    /* must send trailer now because eof or error */
+                    c->state = HTTPSTATE_SEND_DATA_TRAILER;
+                }
+            } else {
+                /* send it to the appropriate stream */
+                if (c->stream->feed) {
+                    /* if coming from a feed, select the right stream */
+                    for(i=0;i<c->stream->nb_streams;i++) {
+                        if (c->stream->feed_streams[i] == pkt.stream_index) {
+                            pkt.stream_index = i;
+                            goto send_it;
+                        }
+                    }
+                } else {
+                send_it:
+                    av_write_packet(&c->fmt_ctx, &pkt);
+                }
+                
+                av_free_packet(&pkt);
+            }
+        }
+        break;
+    default:
+    case HTTPSTATE_SEND_DATA_TRAILER:
+        /* last packet test ? */
+        if (c->last_packet_sent)
+            return -1;
+        /* prepare header */
+        c->fmt_ctx.format->write_trailer(&c->fmt_ctx);
+        c->last_packet_sent = 1;
+        break;
+    }
+    return 0;
+}
+
+/* should convert the format at the same time */
+static int http_send_data(HTTPContext *c)
+{
+    int len, ret;
+
+    while (c->buffer_ptr >= c->buffer_end) {
+        ret = http_prepare_data(c);
+        if (ret < 0)
+            return -1;
+        else if (ret == 0) {
+            break;
+        } else {
+            /* state change requested */
+            return 0;
+        }
+    }
+
+    len = write(c->fd, c->buffer_ptr, c->buffer_end - c->buffer_ptr);
+    if (len < 0) {
+        if (errno != EAGAIN && errno != EINTR) {
+            /* error : close connection */
+            return -1;
+        }
+    } else {
+        c->buffer_ptr += len;
+        c->data_count += len;
+    }
+    return 0;
+}
+
+static int http_start_receive_data(HTTPContext *c)
+{
+    int fd;
+
+    if (c->stream->feed_opened)
+        return -1;
+
+    /* open feed */
+    fd = open(c->stream->feed_filename, O_RDWR);
+    if (fd < 0)
+        return -1;
+    c->feed_fd = fd;
+    
+    c->stream->feed_write_index = ffm_read_write_index(fd);
+    c->stream->feed_size = lseek(fd, 0, SEEK_END);
+    lseek(fd, 0, SEEK_SET);
+
+    /* init buffer input */
+    c->buffer_ptr = c->buffer;
+    c->buffer_end = c->buffer + FFM_PACKET_SIZE;
+    c->stream->feed_opened = 1;
+    return 0;
+}
+    
+static int http_receive_data(HTTPContext *c)
+{
+    int len;
+    HTTPContext *c1;
+
+    if (c->buffer_ptr >= c->buffer_end) {
+        /* a packet has been received : write it in the store, except
+           if header */
+        if (c->data_count > FFM_PACKET_SIZE) {
+            FFStream *feed = c->stream;
+            
+            //            printf("writing pos=0x%Lx size=0x%Lx\n", feed->feed_write_index, feed->feed_size);
+            /* XXX: use llseek or url_seek */
+            lseek(c->feed_fd, feed->feed_write_index, SEEK_SET);
+            write(c->feed_fd, c->buffer, FFM_PACKET_SIZE);
+            
+            feed->feed_write_index += FFM_PACKET_SIZE;
+            /* update file size */
+            if (feed->feed_write_index > c->stream->feed_size)
+                feed->feed_size = feed->feed_write_index;
+
+            /* handle wrap around if max file size reached */
+            if (feed->feed_write_index >= c->stream->feed_max_size)
+                feed->feed_write_index = FFM_PACKET_SIZE;
+
+            /* write index */
+            ffm_write_write_index(c->feed_fd, feed->feed_write_index);
+
+            /* wake up any waiting connections */
+            for(c1 = first_http_ctx; c1 != NULL; c1 = c1->next) {
+                if (c1->state == HTTPSTATE_WAIT_FEED && 
+                    c1->stream->feed == c->stream->feed) {
+                    c1->state = HTTPSTATE_SEND_DATA;
+                }
+            }
+        }
+        c->buffer_ptr = c->buffer;
+    }
+
+    len = read(c->fd, c->buffer_ptr, c->buffer_end - c->buffer_ptr);
+    if (len < 0) {
+        if (errno != EAGAIN && errno != EINTR) {
+            /* error : close connection */
+            goto fail;
+        }
+    } else if (len == 0) {
+        /* end of connection : close it */
+        goto fail;
+    } else {
+        c->buffer_ptr += len;
+        c->data_count += len;
+    }
+    return 0;
+ fail:
+    c->stream->feed_opened = 0;
+    close(c->feed_fd);
+    return -1;
+}
+
+/* return the stream number in the feed */
+int add_av_stream(FFStream *feed,
+                  AVStream *st)
+{
+    AVStream *fst;
+    AVCodecContext *av, *av1;
+    int i;
+
+    av = &st->codec;
+    for(i=0;i<feed->nb_streams;i++) {
+        st = feed->streams[i];
+        av1 = &st->codec;
+        if (av1->codec == av->codec &&
+            av1->bit_rate == av->bit_rate) {
+
+            switch(av->codec_type) {
+            case CODEC_TYPE_AUDIO:
+                if (av1->channels == av->channels &&
+                    av1->sample_rate == av->sample_rate)
+                    goto found;
+                break;
+            case CODEC_TYPE_VIDEO:
+                if (av1->width == av->width &&
+                    av1->height == av->height &&
+                    av1->frame_rate == av->frame_rate &&
+                    av1->gop_size == av->gop_size)
+                    goto found;
+                break;
+            }
+        }
+    }
+    
+    fst = av_mallocz(sizeof(AVStream));
+    if (!fst)
+        return -1;
+    fst->priv_data = av_mallocz(sizeof(FeedData));
+    memcpy(&fst->codec, av, sizeof(AVCodecContext));
+    feed->streams[feed->nb_streams++] = fst;
+    return feed->nb_streams - 1;
+ found:
+    return i;
+}
+
+/* compute the needed AVStream for each feed */
+void build_feed_streams(void)
+{
+    FFStream *stream, *feed;
+    int i;
+
+    /* gather all streams */
+    for(stream = first_stream; stream != NULL; stream = stream->next) {
+        feed = stream->feed;
+        if (feed) {
+            if (!stream->is_feed) {
+                for(i=0;i<stream->nb_streams;i++) {
+                    stream->feed_streams[i] = add_av_stream(feed, stream->streams[i]);
+                }
+            } else {
+                for(i=0;i<stream->nb_streams;i++) {
+                    stream->feed_streams[i] = i;
+                }
+            }
+        }
+    }
+
+    /* create feed files if needed */
+    for(feed = first_feed; feed != NULL; feed = feed->next_feed) {
+        int fd;
+
+        if (!url_exist(feed->feed_filename)) {
+            AVFormatContext s1, *s = &s1;
+
+            /* only write the header of the ffm file */
+            if (url_fopen(&s->pb, feed->feed_filename, URL_WRONLY) < 0) {
+                fprintf(stderr, "Could not open output feed file '%s'\n",
+                        feed->feed_filename);
+                exit(1);
+            }
+            s->format = feed->fmt;
+            s->nb_streams = feed->nb_streams;
+            for(i=0;i<s->nb_streams;i++) {
+                AVStream *st;
+                st = feed->streams[i];
+                s->streams[i] = st;
+            }
+            s->format->write_header(s);
+
+            url_fclose(&s->pb);
+        }
+        /* get feed size and write index */
+        fd = open(feed->feed_filename, O_RDONLY);
+        if (fd < 0) {
+            fprintf(stderr, "Could not open output feed file '%s'\n",
+                    feed->feed_filename);
+            exit(1);
+        }
+
+        feed->feed_write_index = ffm_read_write_index(fd);
+        feed->feed_size = lseek(fd, 0, SEEK_END);
+        /* ensure that we do not wrap before the end of file */
+        if (feed->feed_max_size < feed->feed_size)
+            feed->feed_max_size = feed->feed_size;
+
+        close(fd);
+    }
+}
+
+static void get_arg(char *buf, int buf_size, const char **pp)
+{
+    const char *p;
+    char *q;
+    int quote;
+
+    p = *pp;
+    while (isspace(*p)) p++;
+    q = buf;
+    quote = 0;
+    if (*p == '\"' || *p == '\'')
+        quote = *p++;
+    for(;;) {
+        if (quote) {
+            if (*p == quote)
+                break;
+        } else {
+            if (isspace(*p))
+                break;
+        }
+        if (*p == '\0')
+            break;
+        if ((q - buf) < buf_size - 1)
+            *q++ = *p;
+        p++;
+    }
+    *q = '\0';
+    if (quote && *p == quote)
+        p++;
+    *pp = p;
+}
+
+/* add a codec and set the default parameters */
+void add_codec(FFStream *stream, AVCodecContext *av)
+{
+    AVStream *st;
+
+    /* compute default parameters */
+    switch(av->codec_type) {
+    case CODEC_TYPE_AUDIO:
+        if (av->bit_rate == 0)
+            av->bit_rate = 64000;
+        if (av->sample_rate == 0)
+            av->sample_rate = 22050;
+        if (av->channels == 0)
+            av->channels = 1;
+        break;
+    case CODEC_TYPE_VIDEO:
+        if (av->bit_rate == 0)
+            av->bit_rate = 64000;
+        if (av->frame_rate == 0)
+            av->frame_rate = 5 * FRAME_RATE_BASE;
+        if (av->width == 0 || av->height == 0) {
+            av->width = 160;
+            av->height = 128;
+        }
+        break;
+    }
+
+    st = av_mallocz(sizeof(AVStream));
+    if (!st)
+        return;
+    stream->streams[stream->nb_streams++] = st;
+    memcpy(&st->codec, av, sizeof(AVCodecContext));
+}
+
+int parse_ffconfig(const char *filename)
+{
+    FILE *f;
+    char line[1024];
+    char cmd[64];
+    char arg[1024];
+    const char *p;
+    int val, errors, line_num;
+    FFStream **last_stream, *stream;
+    FFStream **last_feed, *feed;
+    AVCodecContext audio_enc, video_enc;
+    int audio_id, video_id;
+
+    f = fopen(filename, "r");
+    if (!f) {
+        perror(filename);
+        return -1;
+    }
+    
+    errors = 0;
+    line_num = 0;
+    first_stream = NULL;
+    last_stream = &first_stream;
+    first_feed = NULL;
+    last_feed = &first_feed;
+    stream = NULL;
+    feed = NULL;
+    audio_id = CODEC_ID_NONE;
+    video_id = CODEC_ID_NONE;
+    for(;;) {
+        if (fgets(line, sizeof(line), f) == NULL)
+            break;
+        line_num++;
+        p = line;
+        while (isspace(*p)) 
+            p++;
+        if (*p == '\0' || *p == '#')
+            continue;
+
+        get_arg(cmd, sizeof(cmd), &p);
+        
+        if (!strcasecmp(cmd, "Port")) {
+            get_arg(arg, sizeof(arg), &p);
+            my_addr.sin_port = htons (atoi(arg));
+        } else if (!strcasecmp(cmd, "BindAddress")) {
+            get_arg(arg, sizeof(arg), &p);
+            if (!inet_aton(arg, &my_addr.sin_addr)) {
+                fprintf(stderr, "%s:%d: Invalid IP address: %s\n", 
+                        filename, line_num, arg);
+                errors++;
+            }
+        } else if (!strcasecmp(cmd, "MaxClients")) {
+            get_arg(arg, sizeof(arg), &p);
+            val = atoi(arg);
+            if (val < 1 || val > HTTP_MAX_CONNECTIONS) {
+                fprintf(stderr, "%s:%d: Invalid MaxClients: %s\n", 
+                        filename, line_num, arg);
+                errors++;
+            } else {
+                nb_max_connections = val;
+            }
+        } else if (!strcasecmp(cmd, "CustomLog")) {
+            get_arg(logfilename, sizeof(logfilename), &p);
+        } else if (!strcasecmp(cmd, "<Feed")) {
+            /*********************************************/
+            /* Feed related options */
+            char *q;
+            if (stream || feed) {
+                fprintf(stderr, "%s:%d: Already in a tag\n",
+                        filename, line_num);
+            } else {
+                feed = av_mallocz(sizeof(FFStream));
+                /* add in stream list */
+                *last_stream = feed;
+                last_stream = &feed->next;
+                /* add in feed list */
+                *last_feed = feed;
+                last_feed = &feed->next_feed;
+                
+                get_arg(feed->filename, sizeof(feed->filename), &p);
+                q = strrchr(feed->filename, '>');
+                if (*q)
+                    *q = '\0';
+                feed->fmt = guess_format("ffm", NULL, NULL);
+                /* defaut feed file */
+                snprintf(feed->feed_filename, sizeof(feed->feed_filename),
+                         "/tmp/%s.ffm", feed->filename);
+                feed->feed_max_size = 5 * 1024 * 1024;
+                feed->is_feed = 1;
+                feed->feed = feed; /* self feeding :-) */
+            }
+        } else if (!strcasecmp(cmd, "File")) {
+            if (feed) {
+                get_arg(feed->feed_filename, sizeof(feed->feed_filename), &p);
+            } else if (stream) {
+                get_arg(stream->feed_filename, sizeof(stream->feed_filename), &p);
+            }
+        } else if (!strcasecmp(cmd, "FileMaxSize")) {
+            if (feed) {
+                const char *p1;
+                double fsize;
+
+                get_arg(arg, sizeof(arg), &p);
+                p1 = arg;
+                fsize = strtod(p1, (char **)&p1);
+                switch(toupper(*p1)) {
+                case 'K':
+                    fsize *= 1024;
+                    break;
+                case 'M':
+                    fsize *= 1024 * 1024;
+                    break;
+                case 'G':
+                    fsize *= 1024 * 1024 * 1024;
+                    break;
+                }
+                feed->feed_max_size = (INT64)fsize;
+            }
+        } else if (!strcasecmp(cmd, "</Feed>")) {
+            if (!feed) {
+                fprintf(stderr, "%s:%d: No corresponding <Feed> for </Feed>\n",
+                        filename, line_num);
+                errors++;
+            }
+            feed = NULL;
+        } else if (!strcasecmp(cmd, "<Stream")) {
+            /*********************************************/
+            /* Stream related options */
+            char *q;
+            if (stream || feed) {
+                fprintf(stderr, "%s:%d: Already in a tag\n",
+                        filename, line_num);
+            } else {
+                stream = av_mallocz(sizeof(FFStream));
+                *last_stream = stream;
+                last_stream = &stream->next;
+
+                get_arg(stream->filename, sizeof(stream->filename), &p);
+                q = strrchr(stream->filename, '>');
+                if (*q)
+                    *q = '\0';
+                stream->fmt = guess_format(NULL, stream->filename, NULL);
+                memset(&audio_enc, 0, sizeof(AVCodecContext));
+                memset(&video_enc, 0, sizeof(AVCodecContext));
+                audio_id = CODEC_ID_NONE;
+                video_id = CODEC_ID_NONE;
+                if (stream->fmt) {
+                    audio_id = stream->fmt->audio_codec;
+                    video_id = stream->fmt->video_codec;
+                }
+            }
+        } else if (!strcasecmp(cmd, "Feed")) {
+            get_arg(arg, sizeof(arg), &p);
+            if (stream) {
+                FFStream *sfeed;
+                
+                sfeed = first_feed;
+                while (sfeed != NULL) {
+                    if (!strcmp(sfeed->filename, arg))
+                        break;
+                    sfeed = sfeed->next_feed;
+                }
+                if (!sfeed) {
+                    fprintf(stderr, "%s:%d: feed '%s' not defined\n",
+                            filename, line_num, arg);
+                } else {
+                    stream->feed = sfeed;
+                }
+            }
+        } else if (!strcasecmp(cmd, "Format")) {
+            get_arg(arg, sizeof(arg), &p);
+            if (!strcmp(arg, "status")) {
+                stream->stream_type = STREAM_TYPE_STATUS;
+                stream->fmt = NULL;
+            } else {
+                stream->stream_type = STREAM_TYPE_LIVE;
+                stream->fmt = guess_format(arg, NULL, NULL);
+                if (!stream->fmt) {
+                    fprintf(stderr, "%s:%d: Unknown Format: %s\n", 
+                            filename, line_num, arg);
+                    errors++;
+                }
+            }
+            if (stream->fmt) {
+                audio_id = stream->fmt->audio_codec;
+                video_id = stream->fmt->video_codec;
+            }
+        } else if (!strcasecmp(cmd, "AudioBitRate")) {
+            get_arg(arg, sizeof(arg), &p);
+            if (stream) {
+                audio_enc.bit_rate = atoi(arg) * 1000;
+            }
+        } else if (!strcasecmp(cmd, "AudioChannels")) {
+            get_arg(arg, sizeof(arg), &p);
+            if (stream) {
+                audio_enc.channels = atoi(arg);
+            }
+        } else if (!strcasecmp(cmd, "AudioSampleRate")) {
+            get_arg(arg, sizeof(arg), &p);
+            if (stream) {
+                audio_enc.sample_rate = atoi(arg);
+            }
+        } else if (!strcasecmp(cmd, "VideoBitRate")) {
+            get_arg(arg, sizeof(arg), &p);
+            if (stream) {
+                video_enc.bit_rate = atoi(arg) * 1000;
+            }
+        } else if (!strcasecmp(cmd, "VideoSize")) {
+            get_arg(arg, sizeof(arg), &p);
+            if (stream) {
+                parse_image_size(&video_enc.width, &video_enc.height, arg);
+                if ((video_enc.width % 16) != 0 ||
+                    (video_enc.height % 16) != 0) {
+                    fprintf(stderr, "%s:%d: Image size must be a multiple of 16\n",
+                            filename, line_num);
+                    errors++;
+                }
+            }
+        } else if (!strcasecmp(cmd, "VideoFrameRate")) {
+            get_arg(arg, sizeof(arg), &p);
+            if (stream) {
+                video_enc.frame_rate = (int)(strtod(arg, NULL) * FRAME_RATE_BASE);
+            }
+        } else if (!strcasecmp(cmd, "VideoGopSize")) {
+            get_arg(arg, sizeof(arg), &p);
+            if (stream) {
+                video_enc.gop_size = atoi(arg);
+            }
+        } else if (!strcasecmp(cmd, "VideoIntraOnly")) {
+            if (stream) {
+                video_enc.gop_size = 1;
+            }
+        } else if (!strcasecmp(cmd, "NoVideo")) {
+            video_id = CODEC_ID_NONE;
+        } else if (!strcasecmp(cmd, "NoAudio")) {
+            audio_id = CODEC_ID_NONE;
+        } else if (!strcasecmp(cmd, "</Stream>")) {
+            if (!stream) {
+                fprintf(stderr, "%s:%d: No corresponding <Stream> for </Stream>\n",
+                        filename, line_num);
+                errors++;
+            }
+            if (stream->feed && stream->fmt && strcmp(stream->fmt->name, "ffm") != 0) {
+                if (audio_id != CODEC_ID_NONE) {
+                    audio_enc.codec_type = CODEC_TYPE_AUDIO;
+                    audio_enc.codec_id = audio_id;
+                    add_codec(stream, &audio_enc);
+                }
+                if (video_id != CODEC_ID_NONE) {
+                    video_enc.codec_type = CODEC_TYPE_VIDEO;
+                    video_enc.codec_id = video_id;
+                    add_codec(stream, &video_enc);
+                }
+            }
+            stream = NULL;
+        } else {
+            fprintf(stderr, "%s:%d: Incorrect keyword: '%s'\n", 
+                    filename, line_num, cmd);
+            errors++;
+        }
+    }
+
+    fclose(f);
+    if (errors)
+        return -1;
+    else
+        return 0;
+}
+
+
+void *http_server_thread(void *arg)
+{
+    http_server(my_addr);
+    return NULL;
+}
+
+#if 0
+static void write_packet(FFCodec *ffenc,
+                         UINT8 *buf, int size)
+{
+    PacketHeader hdr;
+    AVCodecContext *enc = &ffenc->enc;
+    UINT8 *wptr;
+    mk_header(&hdr, enc, size);
+    wptr = http_fifo.wptr;
+    fifo_write(&http_fifo, (UINT8 *)&hdr, sizeof(hdr), &wptr);
+    fifo_write(&http_fifo, buf, size, &wptr);
+    /* atomic modification of wptr */
+    http_fifo.wptr = wptr;
+    ffenc->data_count += size;
+    ffenc->avg_frame_size = ffenc->avg_frame_size * AVG_COEF + size * (1.0 - AVG_COEF);
+}
+#endif
+
+void help(void)
+{
+    printf("ffserver version " FFMPEG_VERSION ", Copyright (c) 2000,2001 Gerard Lantau\n"
+           "usage: ffserver [-L] [-h] [-f configfile]\n"
+           "Hyper fast multi format Audio/Video streaming server\n"
+           "\n"
+           "-L            : print the LICENCE\n"
+           "-h            : this help\n"
+           "-f configfile : use configfile instead of /etc/ffserver.conf\n"
+           );
+}
+
+void licence(void)
+{
+    printf(
+    "ffserver version " FFMPEG_VERSION "\n"
+    "Copyright (c) 2000,2001 Gerard Lantau\n"
+    "This program is free software; you can redistribute it and/or modify\n"
+    "it under the terms of the GNU General Public License as published by\n"
+    "the Free Software Foundation; either version 2 of the License, or\n"
+    "(at your option) any later version.\n"
+    "\n"
+    "This program is distributed in the hope that it will be useful,\n"
+    "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
+    "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n"
+    "GNU General Public License for more details.\n"
+    "\n"
+    "You should have received a copy of the GNU General Public License\n"
+    "along with this program; if not, write to the Free Software\n"
+    "Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.\n"
+    );
+}
+
+int main(int argc, char **argv)
+{
+    const char *config_filename;
+    int c;
+
+    register_all();
+
+    config_filename = "/etc/ffserver.conf";
+
+    for(;;) {
+        c = getopt_long_only(argc, argv, "Lh?f:", NULL, NULL);
+        if (c == -1)
+            break;
+        switch(c) {
+        case 'L':
+            licence();
+            exit(1);
+        case '?':
+        case 'h':
+            help();
+            exit(1);
+        case 'f':
+            config_filename = optarg;
+            break;
+        default:
+            exit(2);
+        }
+    }
+
+    /* address on which the server will handle connections */
+    my_addr.sin_family = AF_INET;
+    my_addr.sin_port = htons (8080);
+    my_addr.sin_addr.s_addr = htonl (INADDR_ANY);
+    nb_max_connections = 5;
+    first_stream = NULL;
+    logfilename[0] = '\0';
+
+    if (parse_ffconfig(config_filename) < 0) {
+        fprintf(stderr, "Incorrect config file - exiting.\n");
+        exit(1);
+    }
+
+    build_feed_streams();
+
+    /* signal init */
+    signal(SIGPIPE, SIG_IGN);
+
+    /* open log file if needed */
+    if (logfilename[0] != '\0') {
+        if (!strcmp(logfilename, "-"))
+            logfile = stdout;
+        else
+            logfile = fopen(logfilename, "w");
+    }
+
+    if (http_server(my_addr) < 0) {
+        fprintf(stderr, "Could start http server\n");
+        exit(1);
+    }
+
+    return 0;
+}

libav/Makefile

+include ../config.mk
+CFLAGS= -O2 -Wall -g -I../libavcodec
+
+OBJS= rm.o mpeg.o asf.o avienc.o jpegenc.o swf.o wav.o raw.o \
+	 avidec.o ffm.o \
+	 avio.o aviobuf.o utils.o \
+	 udp.o http.o file.o grab.o audio.o img.o
+
+LIB= libav.a
+
+all: $(LIB)
+
+$(LIB): $(OBJS)
+	rm -f $@
+	$(AR) rcs $@ $(OBJS)
+
+%.o: %.c
+	$(CC) $(CFLAGS) -c -o $@ $< 
+
+clean: 
+	rm -f *.o *~ *.a 
+