[FFmpeg-trac] #6068(avformat:new): -allow_raw_vfw 1 creates invalid Matroska

[FFmpeg]

#6068: -allow_raw_vfw 1 creates invalid Matroska
--------------------------------------+----------------------------------
               Reporter:  dericed     |                  Owner:
                   Type:  defect      |                 Status:  new
               Priority:  normal      |              Component:  avformat
                Version:  git-master  |               Keywords:  matroska
             Blocked By:              |               Blocking:
Reproduced by developer:  0           |  Analyzed by developer:  0
--------------------------------------+----------------------------------
 Summary of the bug:

 using -allow_raw_vfw creates a Matroska track with two CodecID Elements,
 when >1 CodecID within a track is invalid.

 How to reproduce:

 Writing rawvideo into Matroska fails with a suggestion to use
 -allow_raw_vfw 1.

 {{{
 ffmpeg -f lavfi -i testsrc -vframes 1 -c:v rawvideo -y tmcd.mkv
 ffmpeg version git-2016-12-28-49abd5d Copyright (c) 2000-2016 the FFmpeg
 developers
   built with Apple LLVM version 8.0.0 (clang-800.0.42.1)
   configuration: --prefix=/usr/local/Cellar/ffmpeg/HEAD-49abd5d --enable-
 shared --enable-pthreads --enable-gpl --enable-version3 --enable-
 hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-
 ldflags= --enable-chromaprint --enable-ffplay --enable-libcaca --enable-
 libfreetype --enable-libmp3lame --enable-libopus --enable-libtesseract
 --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid
 --enable-opencl --disable-lzma --enable-vda
   libavutil      55. 43.100 / 55. 43.100
   libavcodec     57. 70.100 / 57. 70.100
   libavformat    57. 61.100 / 57. 61.100
   libavdevice    57.  2.100 / 57.  2.100
   libavfilter     6. 68.100 /  6. 68.100
   libavresample   3.  2.  0 /  3.  2.  0
   libswscale      4.  3.101 /  4.  3.101
   libswresample   2.  4.100 /  2.  4.100
   libpostproc    54.  2.100 / 54.  2.100
 Input #0, lavfi, from 'testsrc':
   Duration: N/A, start: 0.000000, bitrate: N/A
     Stream #0:0: Video: rawvideo (RGB[24] / 0x18424752), rgb24, 320x240
 [SAR 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
 Output #0, matroska, to 'mkv.mkv':
   Metadata:
     encoder         : Lavf57.61.100
     Stream #0:0: Video: rawvideo, rgb24, 320x240 [SAR 1:1 DAR 4:3],
 q=2-31, 200 kb/s, 25 fps, 1k tbn, 25 tbc
     Metadata:
       encoder         : Lavc57.70.100 rawvideo
 Stream mapping:
   Stream #0:0 -> #0:0 (rawvideo (native) -> rawvideo (native))
 Press [q] to stop, [?] for help
 [matroska @ 0x7ff222004800] Raw RGB is not supported Natively in Matroska,
 you can use AVI or NUT or
 If you would like to store it anyway using VFW mode, enable allow_raw_vfw
 (-allow_raw_vfw 1)
 av_interleaved_write_frame(): Invalid argument
 Error writing trailer of mkv.mkv: Invalid argumentframe=    1 fps=0.0
 q=-0.0 Lsize=       0kB time=00:00:00.00 bitrate=3096.0kbits/s
 speed=0.885x
 video:225kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: unknown
 }}}


 Adding -allow_raw_vfw 1 as suggested:

 {{{
 ffmpeg -f lavfi -i testsrc -vframes 1 -c:v rawvideo -allow_raw_vfw 1 -y
 mkv.mkv
 ffmpeg version git-2016-12-28-49abd5d Copyright (c) 2000-2016 the FFmpeg
 developers
   built with Apple LLVM version 8.0.0 (clang-800.0.42.1)
   configuration: --prefix=/usr/local/Cellar/ffmpeg/HEAD-49abd5d --enable-
 shared --enable-pthreads --enable-gpl --enable-version3 --enable-
 hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-
 ldflags= --enable-chromaprint --enable-ffplay --enable-libcaca --enable-
 libfreetype --enable-libmp3lame --enable-libopus --enable-libtesseract
 --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid
 --enable-opencl --disable-lzma --enable-vda
   libavutil      55. 43.100 / 55. 43.100
   libavcodec     57. 70.100 / 57. 70.100
   libavformat    57. 61.100 / 57. 61.100
   libavdevice    57.  2.100 / 57.  2.100
   libavfilter     6. 68.100 /  6. 68.100
   libavresample   3.  2.  0 /  3.  2.  0
   libswscale      4.  3.101 /  4.  3.101
   libswresample   2.  4.100 /  2.  4.100
   libpostproc    54.  2.100 / 54.  2.100
 Input #0, lavfi, from 'testsrc':
   Duration: N/A, start: 0.000000, bitrate: N/A
     Stream #0:0: Video: rawvideo (RGB[24] / 0x18424752), rgb24, 320x240
 [SAR 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
 Output #0, matroska, to 'mkv.mkv':
   Metadata:
     encoder         : Lavf57.61.100
     Stream #0:0: Video: rawvideo, rgb24, 320x240 [SAR 1:1 DAR 4:3],
 q=2-31, 200 kb/s, 25 fps, 1k tbn, 25 tbc
     Metadata:
       encoder         : Lavc57.70.100 rawvideo
 Stream mapping:
   Stream #0:0 -> #0:0 (rawvideo (native) -> rawvideo (native))
 Press [q] to stop, [?] for help
 [matroska @ 0x7ffb92006000] codec rawvideo is not supported by this format
 frame=    1 fps=0.0 q=-0.0 Lsize=     226kB time=00:00:00.00
 bitrate=1849664.0kbits/s speed=0.621x
 video:225kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 0.350694%
 }}}


 Assess with mkvalidator:
 mkvalidator mkv.mkv
 {{{
 ERR202: Unique element 'CodecID' in TrackEntry at 393 found more than once
 at 446
 ERR202: Unique element 'CodecID' in TrackEntry at 393 found more than once
 at 446
 ....... file created with Lavf57.61.100 / Lavf57.61.100
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/6068>
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