Add dv50 tag to support samples with dv50 fourcc in AVI.

patch by christophelorenz  christophelorenz gmail com


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@11859 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavformat/riff.c

@@ -87,6 +87,7 @@ const AVCodecTag codec_bmp_tags[] = {
     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', 'd') },
     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'l') },
     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', '2', '5') },
+    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', '5', '0') },
     { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '1') },
     { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '2') },
     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'p', 'g', '2') },