Opened 12 years ago
Last modified 11 years ago
#1558 open defect
Artefacts and wrong duration when decoding a (possibly damaged) matroska file
| Reported by: | Carl Eugen Hoyos | Owned by: | |
|---|---|---|---|
| Priority: | normal | Component: | avformat |
| Version: | git-master | Keywords: | mkv duration roundup |
| Cc: | Swinder Pal SINGH | Blocked By: | |
| Blocking: | Reproduced by developer: | yes | |
| Analyzed by developer: | no |
Description
(issue 384)
http://samples.ffmpeg.org/ffmpeg-bugs/roundup/issue384/
FFmpeg is unable to decode a matroska sample that is played fine by vlc.
$ ffmpeg -i matroska_crash.mkv
ffmpeg version N-42619-g6b7849e Copyright (c) 2000-2012 the FFmpeg developers
built on Jul 19 2012 08:58:35 with gcc 4.3.2
configuration: --cc=/usr/local/gcc-4.3.2/bin/gcc --enable-gpl --enable-libopenjpeg --enable-libvorbis --enable-libspeex --enable-libmp3lame --enable-libtheora --extra-ldflags=-lm --enable-libvpx --enable-libxavs --enable-x11grab --enable-libass
libavutil 51. 65.100 / 51. 65.100
libavcodec 54. 41.100 / 54. 41.100
libavformat 54. 17.100 / 54. 17.100
libavdevice 54. 1.100 / 54. 1.100
libavfilter 3. 2.100 / 3. 2.100
libswscale 2. 1.100 / 2. 1.100
libswresample 0. 15.100 / 0. 15.100
libpostproc 52. 0.100 / 52. 0.100
[matroska,webm @ 0x90764e0] Unknown entry 0x6E1F
[matroska,webm @ 0x90764e0] Unknown entry 0x48B2
[matroska,webm @ 0x90764e0] Read error at pos. 2376 (0x948)
[matroska,webm @ 0x90764e0] Unknown entry 0x81
[matroska,webm @ 0x90764e0] Read error at pos. 192 (0xc0)
[matroska,webm @ 0x90764e0] Unknown entry 0x82
[matroska,webm @ 0x90764e0] Unknown entry 0x67C9
Last message repeated 1 times
[matroska,webm @ 0x90764e0] Unknown entry 0x82
[matroska,webm @ 0x90764e0] Could not find codec parameters for stream 1 (Audio: mp3, 48000 Hz, 2 channels, s16): unspecified sample size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[matroska,webm @ 0x90764e0] Could not find codec parameters for stream 3 (Audio: mp3, 48000 Hz, 2 channels, s16): unspecified sample size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[matroska,webm @ 0x90764e0] Could not find codec parameters for stream 5 (Audio: mp3, 48000 Hz, 2 channels, s16): unspecified sample size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[matroska,webm @ 0x90764e0] Estimating duration from bitrate, this may be inaccurate
Guessed Channel Layout for Input Stream #0.1 : stereo
Guessed Channel Layout for Input Stream #0.3 : stereo
Guessed Channel Layout for Input Stream #0.5 : stereo
Input #0, matroska,webm, from 'matroska_crash.mkv':
Metadata:
creation_time : 2005-07-28 20:39:44
Duration: N/A, start: 0.000000, bitrate: N/A
Chapter #0.0: start 0.000000, end 15.000000
Metadata:
title : Introduction
Chapter #0.1: start 15.000000, end 30.000000
Metadata:
title : Developpement
Chapter #0.2: start 30.000000, end 45.200000
Metadata:
title : Conclusion
Stream #0:0(eng): Video: mpeg4 (DX50 / 0x30355844), yuv420p, 720x400, SAR 1:1 DAR 9:5, 25 fps, 25 tbr, 1k tbn, 1k tbc (default)
Stream #0:1(eng): Audio: mp3, 48000 Hz, stereo, s16 (default)
Stream #0:2(eng): Video: mpeg4 (DX50 / 0x30355844), yuv420p, 720x400, SAR 1:1 DAR 9:5, 25 fps, 25 tbr, 1k tbn, 1k tbc (default)
Stream #0:3(eng): Audio: mp3, 48000 Hz, stereo, s16 (default)
Stream #0:4(eng): Video: mpeg4 (DX50 / 0x30355844), yuv420p, 720x400, SAR 1:1 DAR 9:5, 25 fps, 25 tbr, 1k tbn, 1k tbc (default)
Stream #0:5(eng): Audio: mp3, 48000 Hz, stereo, s16 (default)
At least one output file must be specified
Change History (4)
comment:1 by , 12 years ago
| Keywords: | roundup added |
|---|
comment:2 by , 11 years ago
| Keywords: | duration added |
|---|---|
| Reproduced by developer: | set |
| Status: | new → open |
| Summary: | Unable to decode a (possibly damaged) matroska file → Artefacts and wrong duration when decoding a (possibly damaged) matroska file |
comment:4 by , 11 years ago
| Cc: | added |
|---|
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The sample plays now but shows heavy artefacts in the beginning that are not visible with vlc, shown duration is wrong, see ticket #3066.
$ ffmpeg -i matroska_crash.mkv -qscale 2 out.mkv ffmpeg version N-57288-g09ba986 Copyright (c) 2000-2013 the FFmpeg developers built on Oct 21 2013 12:07:28 with gcc 4.7 (SUSE Linux) configuration: --enable-gpl libavutil 52. 47.101 / 52. 47.101 libavcodec 55. 37.102 / 55. 37.102 libavformat 55. 19.103 / 55. 19.103 libavdevice 55. 4.100 / 55. 4.100 libavfilter 3. 88.102 / 3. 88.102 libswscale 2. 5.101 / 2. 5.101 libswresample 0. 17.104 / 0. 17.104 libpostproc 52. 3.100 / 52. 3.100 [matroska,webm @ 0x1e12880] Unknown entry 0x6E1F [matroska,webm @ 0x1e12880] Unknown entry 0x48B2 [matroska,webm @ 0x1e12880] Read error at pos. 2376 (0x948) [matroska,webm @ 0x1e12880] Unknown entry 0x81 [matroska,webm @ 0x1e12880] Read error at pos. 192 (0xc0) [matroska,webm @ 0x1e12880] Unknown entry 0x82 Truncating packet of size 1304136787 to 4682756 [matroska,webm @ 0x1e12880] Unknown entry 0x67C9 Last message repeated 1 times [matroska,webm @ 0x1e12880] Unknown entry 0x82 Truncating packet of size 1304137043 to 4682741 [matroska,webm @ 0x1e12880] Unknown entry 0x83 Last message repeated 4 times Truncating packet of size 1304137043 to 4682661 [matroska,webm @ 0x1e12880] Unknown entry 0x83 Truncating packet of size 491633549 to 4682646 [matroska,webm @ 0x1e12880] Unknown entry 0x83 Truncating packet of size 881479099 to 4682631 [matroska,webm @ 0x1e12880] Unknown entry 0x83 Truncating packet of size 75773773 to 4682616 [matroska,webm @ 0x1e12880] Unknown entry 0x83 Truncating packet of size 198743885 to 4682600 [matroska,webm @ 0x1e12880] Unknown entry 0x83 [matroska,webm @ 0x1e12880] Unknown entry 0x7B4C [matroska,webm @ 0x1e12880] Unknown entry 0x7DAC [matroska,webm @ 0x1e12880] Unknown entry 0xC9 [matroska,webm @ 0x1e12880] Unknown entry 0x81 [matroska,webm @ 0x1e12880] Unknown entry 0x90 [matroska,webm @ 0x1e12880] Unknown entry 0xF1 [matroska,webm @ 0x1e12880] Unknown entry 0x55B1 Truncating packet of size 182616600 to 4128317 [mpeg4 @ 0x1e15560] hmm, seems the headers are not complete, trying to guess time_increment_bits [mpeg4 @ 0x1e15560] my guess is 5 bits ;) [matroska,webm @ 0x1e12880] Estimating duration from bitrate, this may be inaccurate [matroska,webm @ 0x1e12880] Could not find codec parameters for stream 3 (Audio: mp3, 48000 Hz, 2 channels, s16p): unspecified frame size Consider increasing the value for the 'analyzeduration' and 'probesize' options [matroska,webm @ 0x1e12880] Could not find codec parameters for stream 5 (Audio: mp3, 48000 Hz, 2 channels, s16p): unspecified frame size Consider increasing the value for the 'analyzeduration' and 'probesize' options Guessed Channel Layout for Input Stream #0.3 : stereo Guessed Channel Layout for Input Stream #0.5 : stereo Input #0, matroska,webm, from 'matroska_crash.mkv': Metadata: creation_time : 2005-07-28 20:39:44 Duration: 00:06:30.25, start: 0.000000, bitrate: 96 kb/s Chapter #0.0: start 0.000000, end 15.000000 Metadata: title : Introduction Chapter #0.1: start 15.000000, end 30.000000 Metadata: title : Developpement Chapter #0.2: start 30.000000, end 45.200000 Metadata: title : Conclusion Stream #0:0(eng): Video: mpeg4 (Simple Profile) (DX50 / 0x30355844), yuv420p, 720x400 [SAR 1:1 DAR 9:5], 25 fps, 25 tbr, 1k tbn, 25 tbc (default) Stream #0:1(eng): Audio: mp3, 48000 Hz, stereo, s16p, 96 kb/s (default) Stream #0:2(eng): Video: mpeg4 (DX50 / 0x30355844), yuv420p, 720x400, SAR 1:1 DAR 9:5, 25 fps, 25 tbr, 1k tbn, 1k tbc (default) Stream #0:3(eng): Audio: mp3, 48000 Hz, stereo, s16p (default) Stream #0:4(eng): Video: mpeg4 (DX50 / 0x30355844), yuv420p, 720x400, SAR 1:1 DAR 9:5, 25 fps, 25 tbr, 1k tbn, 1k tbc (default) Stream #0:5(eng): Audio: mp3, 48000 Hz, stereo, s16p (default) Please use -q:a or -q:v, -qscale is ambiguous Output #0, matroska, to 'out.mkv': Metadata: encoder : Lavf55.19.103 Chapter #0.0: start 0.000000, end 15.000000 Metadata: title : Introduction Chapter #0.1: start 15.000000, end 30.000000 Metadata: title : Developpement Chapter #0.2: start 30.000000, end 45.200000 Metadata: title : Conclusion Stream #0:0(eng): Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 720x400 [SAR 1:1 DAR 9:5], q=2-31, 200 kb/s, 1k tbn, 25 tbc (default) Stream #0:1(eng): Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz, stereo, fltp, 192 kb/s (default) Stream mapping: Stream #0:0 -> #0:0 (mpeg4 -> mpeg4) Stream #0:1 -> #0:1 (mp3 -> ac3) Press [q] to stop, [?] for help [mpeg4 @ 0x205fb00] warning: first frame is no keyframe frame= 953 fps=0.0 q=2.0 Lsize= 8082kB time=00:00:45.20 bitrate=1464.8kbits/s video:7170kB audio:893kB subtitle:0 global headers:0kB muxing overhead 0.229468%