[FFmpeg-trac] #438(avformat:open): broken frame after seek in ogg container
FFmpeg
trac at avcodec.org
Wed Sep 7 00:44:07 CEST 2011
#438: broken frame after seek in ogg container
-------------------------------------+------------------------------------
Reporter: j | Owner:
Type: defect | Status: open
Priority: normal | Component: avformat
Version: unspecified | Resolution:
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+------------------------------------
Comment (by j):
here a sample: http://v2v.cc/~j/samples/seektest.ogv
{{{
ffmpeg -ss 10 -i seektest.ogv -vframes 1 seektest.ogv.jpg
}}}
{{{
ffmpeg version N-32369-gc0323b9, Copyright (c) 2000-2011 the FFmpeg
developers
built on Sep 6 2011 17:15:36 with gcc 4.6.1
configuration: --enable-gpl --enable-postproc --enable-libvorbis
--enable-pthreads --enahble-libtheora --enable-libx264 --enable-libmp3lame
--enable-libschroedinger --enable-libxvid --enable-libspeex --enable-
libgsm --enable-nonfree --enable-libfaac --enable-version3 --enable-
libopencore-amrnb --enable-libopencore-amrwb --disable-shared --enable-
libvpx --enable-x11grab --disable-encoder=vorbis
libavutil 51. 16. 0 / 51. 16. 0
libavcodec 53. 13. 0 / 53. 13. 0
libavformat 53. 11. 0 / 53. 11. 0
libavdevice 53. 3. 0 / 53. 3. 0
libavfilter 2. 39. 0 / 2. 39. 0
libswscale 2. 1. 0 / 2. 1. 0
libpostproc 51. 2. 0 / 51. 2. 0
[ogg @ 0x1b39780] Unknown skeleton version 4.0
[ogg @ 0x1b39780] max_analyze_duration 5000000 reached at 5000000
Input #0, ogg, from 'seektest.ogv':
Duration: 00:00:21.52, start: 0.000000, bitrate: 1016 kb/s
Stream #0.0: Data: none
Stream #0.1: Video: theora, yuv420p, 720x576 [SAR 16:15 DAR 4:3], 25
fps, 25 tbr, 25 tbn, 25 tbc
Stream #0.2: Audio: vorbis, 48000 Hz, stereo, s16, 80 kb/s
Metadata:
ENCODER : ffmpeg2theora-0.27
SOURCE_OSHASH : f8455fdcb9f10909
Incompatible pixel format 'yuv420p' for codec 'mjpeg', auto-selecting
format 'yuvj420p'
[buffer @ 0x1b3bfe0] w:720 h:576 pixfmt:yuv420p tb:1/1000000 sar:16/15
sws_param:
[buffersink @ 0x1b7a580] auto-inserting filter 'auto-inserted scaler 0'
between the filter 'src' and the filter 'out'
[scale @ 0x1b3e600] w:720 h:576 fmt:yuv420p -> w:720 h:576 fmt:yuvj420p
flags:0x4
Output #0, image2, to 'seektest.ogv.jpg':
Metadata:
encoder : Lavf53.11.0
Stream #0.0: Video: mjpeg, yuvj420p, 720x576 [SAR 16:15 DAR 4:3],
q=2-31, 200 kb/s, 90k tbn, 25 tbc
Stream mapping:
Stream #0.1 -> #0.0 (theora -> mjpeg)
Press [q] to stop, [?] for help
[theora @ 0x1b3da20] vp3: first frame not a keyframe
frame= 1 fps= 0 q=4.4 Lsize= -0kB time=00:00:00.04 bitrate=
-4.4kbits/s dup=0 drop=1
video:17kB audio:0kB global headers:0kB muxing overhead -100.129184%
}}}
results http://v2v.cc/~j/samples/seektest.ogv.jpg
{{{
ffmpeg -i seektest.ogv -acodec copy -vcodec copy seektest.mkv
ffmpeg -ss 10 -i seektest.mkv -vframes 1 seektest.mkv.jpg
}}}
{{{
ffmpeg version N-32369-gc0323b9, Copyright (c) 2000-2011 the FFmpeg
developers
built on Sep 6 2011 17:15:36 with gcc 4.6.1
configuration: --enable-gpl --enable-postproc --enable-libvorbis
--enable-pthreads --enable-libtheora --enable-libx264 --enable-libmp3lame
--enable-libschroedinger --enable-libxvid --enable-libspeex --enable-
libgsm --enable-nonfree --enable-libfaac --enable-version3 --enable-
libopencore-amrnb --enable-libopencore-amrwb --disable-shared --enable-
libvpx --enable-x11grab --disable-encoder=vorbis
libavutil 51. 16. 0 / 51. 16. 0
libavcodec 53. 13. 0 / 53. 13. 0
libavformat 53. 11. 0 / 53. 11. 0
libavdevice 53. 3. 0 / 53. 3. 0
libavfilter 2. 39. 0 / 2. 39. 0
libswscale 2. 1. 0 / 2. 1. 0
libpostproc 51. 2. 0 / 51. 2. 0
[matroska,webm @ 0x1cf9780] parser not found for codec vorbis, packets or
times may be invalid.
[matroska,webm @ 0x1cf9780] Estimating duration from bitrate, this may be
inaccurate
Input #0, matroska,webm, from 'seektest.mkv':
Metadata:
ENCODER : Lavf53.11.0
Duration: 00:00:21.51, start: 0.000000, bitrate: N/A
Stream #0.0: Video: theora, yuv420p, 720x576 [SAR 16:15 DAR 4:3], 25
fps, 25 tbr, 1k tbn, 25 tbc (default)
Stream #0.1: Audio: vorbis, 48000 Hz, stereo, s16 (default)
Metadata:
ENCODER : ffmpeg2theora-0.27
SOURCE_OSHASH : f8455fdcb9f10909
Incompatible pixel format 'yuv420p' for codec 'mjpeg', auto-selecting
format 'yuvj420p'
[buffer @ 0x1d01640] w:720 h:576 pixfmt:yuv420p tb:1/1000000 sar:16/15
sws_param:
[buffersink @ 0x1e839e0] auto-inserting filter 'auto-inserted scaler 0'
between the filter 'src' and the filter 'out'
[scale @ 0x1e829a0] w:720 h:576 fmt:yuv420p -> w:720 h:576 fmt:yuvj420p
flags:0x4
Output #0, image2, to 'seektest.mkv.jpg':
Metadata:
encoder : Lavf53.11.0
Stream #0.0: Video: mjpeg, yuvj420p, 720x576 [SAR 16:15 DAR 4:3],
q=2-31, 200 kb/s, 90k tbn, 25 tbc (default)
Stream mapping:
Stream #0.0 -> #0.0 (theora -> mjpeg)
Press [q] to stop, [?] for help
frame= 1 fps= 0 q=6.2 Lsize= -0kB time=00:00:00.04 bitrate=
-4.4kbits/s dup=0 drop=46
video:31kB audio:0kB global headers:0kB muxing overhead -100.070312%
}}}
result http://v2v.cc/~j/samples/seektest.mkv.jpg
i would expect the same result for ogv and mkv.
--
Ticket URL: <http://ffmpeg.org/trac/ffmpeg/ticket/438#comment:2>
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