[FFmpeg-devel] PATCH: fourcc for VP6 Flash / FLV4 in .mkv

[Christian P. Schmidt]

Hi,

I just encountered a file in the wild that contains FLV4 in .mkv. The
output of ffprobe

FFprobe version SVN-r22905, Copyright (c) 2007-2010 the FFmpeg developers
  built on Apr 19 2010 11:31:42 with gcc 4.4.3
  configuration: --enable-nonfree --enable-gpl --enable-version3
--prefix=/usr
  libavutil     50.14. 0 / 50.14. 0
  libavcodec    52.66. 0 / 52.66. 0
  libavformat   52.61. 0 / 52.61. 0
  libavdevice   52. 2. 0 / 52. 2. 0
  libswscale     0.10. 0 /  0.10. 0
[matroska @ 0x169a820]Unknown/unsupported CodecID V_MS/VFW/FOURCC.
[matroska @ 0x169a820]max_analyze_duration reached
[matroska @ 0x169a820]Estimating duration from bitrate, this may be
inaccurate
Input #0, matroska, from 'file.mkv':
  Duration: 00:26:22.18, start: 0.000000, bitrate: 128 kb/s
    Stream #0.0(jpn): Video: FLV4 / 0x34564C46, 640x368, PAR 1:1 DAR
40:23, 23.98 tbr, 1k tbn, 1k tbc
    Stream #0.1(jpn): Audio: mp3, 44100 Hz, 2 channels, s16, 128 kb/s
    Stream #0.2(eng): Subtitle: 0x0000
    Stream #0.3: Attachment: 0x0000

Video was not completely identified and ffplay could not play it.
Associating the FLV4 fourcc with the VP6F video codec solved this:

FFprobe version SVN-r22905, Copyright (c) 2007-2010 the FFmpeg developers
  built on Apr 19 2010 11:31:42 with gcc 4.4.3
  configuration: --enable-nonfree --enable-gpl --enable-version3
--prefix=/usr
  libavutil     50.14. 0 / 50.14. 0
  libavcodec    52.66. 0 / 52.66. 0
  libavformat   52.61. 0 / 52.61. 0
  libavdevice   52. 2. 0 / 52. 2. 0
  libswscale     0.10. 0 /  0.10. 0
[matroska @ 0x21d30b0]max_analyze_duration reached
[matroska @ 0x21d30b0]Estimating duration from bitrate, this may be
inaccurate
Input #0, matroska, from 'file.mkv':
  Duration: 00:26:22.18, start: 0.000000, bitrate: 128 kb/s
    Stream #0.0(jpn): Video: vp6f, yuv420p, 640x368, PAR 1:1 DAR 40:23,
23.98 tbr, 1k tbn, 1k tbc
    Stream #0.1(jpn): Audio: mp3, 44100 Hz, 2 channels, s16, 128 kb/s
    Stream #0.2(eng): Subtitle: 0x0000
    Stream #0.3: Attachment: 0x0000

Patch attached.

Regards,
Christian
-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: flv4-4cc.patch
URL: <http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/attachments/20100419/4dad7299/attachment.asc>