Matroska testfile test7.mkv fails again

[Carl Eugen Hoyos]

Ticket #545, fixed in d493170, broken since 3bbf3f7
Source file is test7.mkv in ​https://sourceforge.net/projects/matroska/files/test_files/matroska_test_w1_1.zip/download
Expected output file length is approximately 37 seconds:

$ ffmpeg -i test7.mkv -qscale 2 -an out.avi
ffmpeg version N-52052-gdcea585 Copyright (c) 2000-2013 the FFmpeg developers
  built on Apr 13 2013 09:34:10 with gcc 4.7 (SUSE Linux)
  configuration: --enable-gpl --disable-indev=jack
  libavutil      52. 26.100 / 52. 26.100
  libavcodec     55.  2.100 / 55.  2.100
  libavformat    55.  2.100 / 55.  2.100
  libavdevice    55.  0.100 / 55.  0.100
  libavfilter     3. 53.101 /  3. 53.101
  libswscale      2.  2.100 /  2.  2.100
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  3.100 / 52.  3.100
[matroska,webm @ 0x1be5f80] Unknown entry 0x4001
Input #0, matroska,webm, from 'test7.mkv':
  Metadata:
    creation_time   : 2010-08-21 17:00:23
    TITLE           : Big Buck Bunny - test 7
    DATE_RELEASED   : 2010
    COMMENT         : Matroska Validation File 7, junk elements are present at the beggining or end of clusters, the parser should skip it. There is also a damaged element at 451418
  Duration: 00:00:37.04, start: 0.000000, bitrate: 4718 kb/s
    Stream #0:0: Video: h264 (Main), yuv420p, 1024x576, SAR 1:1 DAR 16:9, 24 fps, 24 tbr, 1k tbn, 2k tbc
    Stream #0:1: Audio: aac, 48000 Hz, stereo, fltp
Please use -q:a or -q:v, -qscale is ambiguous
Output #0, avi, to 'out.avi':
  Metadata:
    ICMT            : Matroska Validation File 7, junk elements are present at the beggining or end of clusters, the parser should skip it. There is also a damaged element at 451418
    INAM            : Big Buck Bunny - test 7
    DATE_RELEASED   : 2010
    ISFT            : Lavf55.2.100
    Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 1024x576 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 24 tbn, 24 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (h264 -> mpeg4)
Press [q] to stop, [?] for help
[matroska,webm @ 0x1be5f80] Invalid track number 87
[matroska,webm @ 0x1be5f80] Invalid stream 87 or size 31
frame=   24 fps=0.0 q=2.0 Lsize=     684kB time=00:00:01.00 bitrate=5605.7kbits/s
video:678kB audio:0kB subtitle:0 global headers:0kB muxing overhead 0.943005%

[reimar]

Could someone bisect which change broke it? The code from 545 is still there and should be working.
In addition, this sample file should be added to the FATE tests.

[Carl Eugen Hoyos]

Replying to cehoyos:

Ticket #545, fixed in d493170, broken since 88ee2aa

@Reimar: How can I improve the wording above?

[Carl Eugen Hoyos]

Regression since 3bbf3f7 - sorry about the useless spam above!

[Carl Eugen Hoyos]

Fixed by Reimar in 762d433