[FFmpeg-user] FFmpeg writes rawvideo, rgb24 to matroska mkv file but cannot play it.

[Matthew Einhorn]

Hi,

I am trying to write rgb24 frames to a mkv file, but the resulting file is
unplayable in ffmpeg or vlc. Before I file a report I want to rule out
idiocy from my part. I did see a ticket with a related issue, but it's
marked as fixed: https://trac.ffmpeg.org/ticket/252.

Starting with any good video, which in this case was MouseTwo.avi:

c:\FFmpeg>ffmpeg -i MouseTwo.avi -an -vcodec rawvideo -pix_fmt rgb24
output.mkv
ffmpeg version N-59453-gd52882f Copyright (c) 2000-2013 the FFmpeg
developers
  built on Dec 30 2013 22:01:59 with gcc 4.8.2 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads
--enable-av
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls
--enab
le-iconv --enable-libass --enable-libbluray --enable-libcaca
--enable-libfreetyp
e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame
--ena
ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
--enable-l
ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr
--enable-libsp
eex --enable-libtheora --enable-libtwolame --enable-libvidstab
--enable-libvo-aa
cenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx
--enable-libwavp
ack --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  libavutil      52. 59.100 / 52. 59.100
  libavcodec     55. 47.100 / 55. 47.100
  libavformat    55. 22.101 / 55. 22.101
  libavdevice    55.  5.102 / 55.  5.102
  libavfilter     4.  0.103 /  4.  0.103
  libswscale      2.  5.101 /  2.  5.101
  libswresample   0. 17.104 /  0. 17.104
  libpostproc    52.  3.100 / 52.  3.100
Input #0, avi, from 'MouseTwo.avi':
  Duration: 00:01:14.93, start: 0.000000, bitrate: 613 kb/s
    Stream #0:0: Video: indeo3 (IV32 / 0x32335649), yuv410p, 320x240, 15
tbr, 15
 tbn, 15 tbc
    Metadata:
      title           : CAPTURE.AVI Video #1
File 'output.mkv' already exists. Overwrite ? [y/N] y
Output #0, matroska, to 'output.mkv':
  Metadata:
    encoder         : Lavf55.22.101
    Stream #0:0: Video: rawvideo, rgb24, 320x240, q=2-31, 200 kb/s, 1k tbn,
15 t
bc
    Metadata:
      title           : CAPTURE.AVI Video #1
Stream mapping:
  Stream #0:0 -> #0:0 (indeo3 -> rawvideo)
Press [q] to stop, [?] for help
frame=  191 fps=0.0 q=0.0 size=   42980kB time=00:00:13.13
bitrate=26809.7kbits/
frame=  442 fps=429 q=0.0 size=   99461kB time=00:00:29.86
bitrate=27280.4kbits/
frame=  723 fps=468 q=0.0 size=  162692kB time=00:00:48.60
bitrate=27423.4kbits/
frame= 1004 fps=488 q=0.0 size=  225924kB time=00:01:07.33
bitrate=27486.4kbits/
frame= 1118 fps=484 q=0.0 Lsize=  251599kB time=00:01:14.93
bitrate=27505.5kbits
/s
video:251550kB audio:0kB subtitle:0 global headers:0kB muxing overhead
0.019392%




But then with ffprobe:

c:\FFmpeg>ffprobe output.mkv
ffprobe version N-59453-gd52882f Copyright (c) 2007-2013 the FFmpeg
developers
  built on Dec 30 2013 22:01:59 with gcc 4.8.2 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads
--enable-av
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls
--enab
le-iconv --enable-libass --enable-libbluray --enable-libcaca
--enable-libfreetyp
e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame
--ena
ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
--enable-l
ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr
--enable-libsp
eex --enable-libtheora --enable-libtwolame --enable-libvidstab
--enable-libvo-aa
cenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx
--enable-libwavp
ack --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  libavutil      52. 59.100 / 52. 59.100
  libavcodec     55. 47.100 / 55. 47.100
  libavformat    55. 22.101 / 55. 22.101
  libavdevice    55.  5.102 / 55.  5.102
  libavfilter     4.  0.103 /  4.  0.103
  libswscale      2.  5.101 /  2.  5.101
  libswresample   0. 17.104 /  0. 17.104
  libpostproc    52.  3.100 / 52.  3.100
[rawvideo @ 04086a80] Invalid pixel format.
[matroska,webm @ 0282f640] Failed to open codec in av_find_stream_info
[rawvideo @ 04086a80] Invalid pixel format.
Input #0, matroska,webm, from 'output.mkv':
  Metadata:
    ENCODER         : Lavf55.22.101
  Duration: 00:01:14.93, start: 0.000000, bitrate: 27505 kb/s
    Stream #0:0: Video: rawvideo, 320x240, SAR 1:1 DAR 4:3, 15 fps, 15 tbr,
1k t
bn, 1k tbc (default)
    Metadata:
      title           : CAPTURE.AVI Video #1
[rawvideo @ 04086a80] Invalid pixel format.
Could not open codec for input stream 0


Thanks in advance!