Make sure that applications build against ffmpeg from ubuntu repositories
conflict with ffmpeg-mt. The libraries from ffmpeg-mt and ffmpeg are not
ABI compatible.

Add extra empty line.

Build ffmpeg with multithreaded support as ffmpeg-mt debian package.
- update all package names to include -mt extension
- update all package shared lib versions
- update all dependencies
- update Replace, Conflicts and Provide for debian package
- make sure this package replaces ffmpeg packet by *-mt variants

Ignore these filetypes.

The rules from ffmpeg-0.5.1 debian package have been adapted for building ffmpeg-mt.

Problematic code path:
1. sps_buffers[0] is allocated in the first thread's codec context when the
decoder is opened.
2. The first thread context is memcpy'd to the other threads by frame_thread_init().
3. The first thread is closed and its sps_buffers[0] is freed.
4. The third thread is closed.
Because it never got to decode a frame, update_thread_context was never called,
and sps_buffers[0] still contained the first thread's pointer.

Fixed by not trying to free sps/pps buffers if the thread wasn't initialized.
I didn't properly consider this when designing it but this seems to be the
best approach anyway.

Fixes still2.mp4 crash from Chromium

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git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23669 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

Patch by Nick Brereton, nick nbrereton net 


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connection (e.g. a seek). This fixes the theoretical case where a server
sends a file first using chunked encoding, and then using non-chunked
encoding.



git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23665 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

them from being sent using chunked encoding (I don't think this ever happened,
but either way it would be wrong).



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It is already rejected by the "source >= 0 && source != ps->num_env" 0 envelope
case and is perfectly legally for the suppressed final envelope case.


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git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23658 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

leading cross_prefix in it. Fixes cross-compilation for darwin.


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r23646.


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E-AC-3 (61937-3 Edition 2) and TrueHD (61937-9).


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23655 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

Document ONLY_IF_THREADS_ENABLED along the way.

Conflicts:
	libavutil/internal.h

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This fixes a potential issue when doing redirects.


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23649 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b