[FFmpeg-trac] #4596(avcodec:open): Blocks when decoding H.264 containing reference B-Frames encoded by Elemental
FFmpeg
trac at avcodec.org
Sat Jun 6 14:40:45 CEST 2015
#4596: Blocks when decoding H.264 containing reference B-Frames encoded by
Elemental
-------------------------------------+-------------------------------------
Reporter: dprestegard | Owner:
Type: defect | Status: open
Priority: important | Component: avcodec
Version: git-master | Resolution:
Keywords: h264 | Blocked By:
regression | Reproduced by developer: 1
Blocking: |
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Changes (by cehoyos):
* keywords: h264 => h264 regression
* priority: normal => important
* version: unspecified => git-master
* status: new => open
* reproduced: 0 => 1
Comment:
For future tickets: Please always provide a sample command that allows to
reproduce the issue together with the complete, uncut console output.
Only reproducible on x86-32 and x86-64, not reproducible with {{{-cpuflags
-ssse3}}}, regression since c12d6955
{{{
$ ffmpeg -i test_bref-short.mp4 -qscale 2 out.avi
ffmpeg version N-72694-g272f87f Copyright (c) 2000-2015 the FFmpeg
developers
built with gcc 4.7 (SUSE Linux)
configuration: --enable-gpl
libavutil 54. 27.100 / 54. 27.100
libavcodec 56. 41.101 / 56. 41.101
libavformat 56. 34.100 / 56. 34.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 16.101 / 5. 16.101
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.100 / 1. 2.100
libpostproc 53. 3.100 / 53. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test_bref-short.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf56.32.100
Duration: 00:00:10.03, start: 0.023000, bitrate: 1977 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
1280x720 [SAR 1:1 DAR 16:9], 1972 kb/s, 59.94 fps, 59.94 tbr, 60k tbn,
119.88 tbc (default)
Metadata:
handler_name : VideoHandler
Please use -q:a or -q:v, -qscale is ambiguous
Output #0, avi, to 'out.avi':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
ISFT : Lavf56.34.100
Stream #0:0(und): Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 1280x720
[SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 59.94 fps, 59.94 tbn, 59.94 tbc
(default)
Metadata:
handler_name : VideoHandler
encoder : Lavc56.41.101 mpeg4
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> mpeg4 (native))
Press [q] to stop, [?] for help
frame= 601 fps=546 q=2.0 Lsize= 11835kB time=00:00:10.02
bitrate=9669.1kbits/s
video:11815kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.169389%
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/4596#comment:4>
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