[FFmpeg-trac] #2007(avformat:new): buffer underflow flood while remuxing mpeg stream
FFmpeg
trac at avcodec.org
Sun Dec 9 19:42:34 CET 2012
#2007: buffer underflow flood while remuxing mpeg stream
--------------------------------------+----------------------------------
Reporter: ubitux | Owner:
Type: defect | Status: new
Priority: minor | Component: avformat
Version: git-master | Keywords: mpeg
Blocked By: | Blocking:
Reproduced by developer: 0 | Analyzed by developer: 0
--------------------------------------+----------------------------------
{{{
% ./ffmpeg -f lavfi -i testsrc=d=300 -y test.mpg
ffmpeg version N-47665-g18eb319 Copyright (c) 2000-2012 the FFmpeg
developers
built on Dec 9 2012 18:50:45 with gcc 4.7.2 (GCC)
configuration: --enable-gpl --enable-fontconfig --enable-libfreetype
--enable-libmp3lame --enable-libvorbis --enable-libxvid --enable-libx264
--enable-libvpx --enable-libtheora --enable-x11grab --enable-libopenjpeg
--enable-libass --enable-libmodplug --enable-libv4l2 --cc=colorgcc
--samples=/home/ubitux/fate-samples --prefix=/tmp/ffinstall --enable-
runtime-cpudetect --enable-libcelt
libavutil 52. 12.100 / 52. 12.100
libavcodec 54. 79.101 / 54. 79.101
libavformat 54. 48.100 / 54. 48.100
libavdevice 54. 3.102 / 54. 3.102
libavfilter 3. 26.101 / 3. 26.101
libswscale 2. 1.103 / 2. 1.103
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
[lavfi @ 0x2aa0260] Estimating duration from bitrate, this may be
inaccurate
Input #0, lavfi, from 'testsrc=d=300':
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
[mpeg @ 0x2aa1a80] VBV buffer size not set, muxing may fail
Output #0, mpeg, to 'test.mpg':
Metadata:
encoder : Lavf54.48.100
Stream #0:0: Video: mpeg1video, yuv420p, 320x240 [SAR 1:1 DAR 4:3],
q=2-31, 200 kb/s, 90k tbn, 25 tbc
Stream mapping:
Stream #0:0 -> #0:0 (rawvideo -> mpeg1video)
Press [q] to stop, [?] for help
frame= 7500 fps=987 q=8.6 Lsize= 7690kB time=00:04:59.96 bitrate=
210.0kbits/s
video:7622kB audio:0kB subtitle:0 global headers:0kB muxing overhead
0.886493%
}}}
{{{
% ./ffmpeg -i test.mpg -c copy -y remux.mpg
ffmpeg version N-47665-g18eb319 Copyright (c) 2000-2012 the FFmpeg
developers
built on Dec 9 2012 18:50:45 with gcc 4.7.2 (GCC)
configuration: --enable-gpl --enable-fontconfig --enable-libfreetype
--enable-libmp3lame --enable-libvorbis --enable-libxvid --enable-libx264
--enable-libvpx --enable-libtheora --enable-x11grab --enable-libopenjpeg
--enable-libass --enable-libmodplug --enable-libv4l2 --cc=colorgcc
--samples=/home/ubitux/fate-samples --prefix=/tmp/ffinstall --enable-
runtime-cpudetect --enable-libcelt
libavutil 52. 12.100 / 52. 12.100
libavcodec 54. 79.101 / 54. 79.101
libavformat 54. 48.100 / 54. 48.100
libavdevice 54. 3.102 / 54. 3.102
libavfilter 3. 26.101 / 3. 26.101
libswscale 2. 1.103 / 2. 1.103
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
[mpeg @ 0x3044240] max_analyze_duration 5000000 reached at 5000000
Input #0, mpeg, from 'test.mpg':
Duration: 00:00:59.76, start: 1.000000, bitrate: 244 kb/s
Stream #0:0[0x1e0]: Video: mpeg1video, yuv420p, 320x240 [SAR 1:1 DAR
4:3], 104857 kb/s, 25 fps, 25 tbr, 90k tbn, 25 tbc
Output #0, mpeg, to 'remux.mpg':
Metadata:
encoder : Lavf54.48.100
Stream #0:0: Video: mpeg1video, yuv420p, 320x240 [SAR 1:1 DAR 4:3],
q=2-31, 104857 kb/s, 25 fps, 90k tbn, 25 tbc
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
[mpeg @ 0x304b0a0] buffer underflow i=0 bufi=10490 size=10833
[mpeg @ 0x304b0a0] packet too large, ignoring buffer limits to mux it
[mpeg @ 0x304b0a0] buffer underflow i=0 bufi=10490 size=10833
[mpeg @ 0x304b0a0] buffer underflow i=0 bufi=10640 size=10662
[mpeg @ 0x304b0a0] packet too large, ignoring buffer limits to mux it
[mpeg @ 0x304b0a0] buffer underflow i=0 bufi=10640 size=10662
[mpeg @ 0x304b0a0] buffer underflow i=0 bufi=10356 size=10841
[mpeg @ 0x304b0a0] packet too large, ignoring buffer limits to mux it
[mpeg @ 0x304b0a0] buffer underflow i=0 bufi=10356 size=10841
[mpeg @ 0x304b0a0] buffer underflow i=0 bufi=10882 size=11225
[mpeg @ 0x304b0a0] packet too large, ignoring buffer limits to mux it
[mpeg @ 0x304b0a0] buffer underflow i=0 bufi=10882 size=11225
[mpeg @ 0x304b0a0] buffer underflow i=0 bufi=10872 size=11165
[mpeg @ 0x304b0a0] packet too large, ignoring buffer limits to mux it
[mpeg @ 0x304b0a0] buffer underflow i=0 bufi=10872 size=11165
[mpeg @ 0x304b0a0] buffer underflow i=0 bufi=10408 size=11000
[mpeg @ 0x304b0a0] packet too large, ignoring buffer limits to mux it
[mpeg @ 0x304b0a0] buffer underflow i=0 bufi=10408 size=11000
frame= 1500 fps=0.0 q=-1.0 Lsize= 1784kB time=00:00:59.96 bitrate=
243.7kbits/s
video:1768kB audio:0kB subtitle:0 global headers:0kB muxing overhead
0.877842%
}}}
The file is playable so I believe the problem is minor. Still this flood
should not happen, especially when the input is created with ffmpeg.
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2007>
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