[FFmpeg-trac] #2333(undetermined:new): mkv + ac3 remux adds a little time
FFmpeg
trac at avcodec.org
Thu Mar 7 02:30:11 CET 2013
#2333: mkv + ac3 remux adds a little time
-------------------------------------+-------------------------------------
Reporter: Squeeto | Owner:
Type: defect | Status: new
Priority: normal | Component:
Version: unspecified | undetermined
Keywords: | Resolution:
Blocking: | Blocked By:
Analyzed by developer: 0 | Reproduced by developer: 0
-------------------------------------+-------------------------------------
Comment (by Squeeto):
Replying to [comment:1 cehoyos]:
> To make this a valid ticket, please provide your failing command line
including complete, unedited console output and please consider using a
"Code block".
Please note the Duration discrepancies:
ffmpeg -i input.mkv -i input.ac3 -map 0:0 -map 1:0 -vcodec copy -acodec
copy -y done.mkv
{{{
ffmpeg version N-50025-gb8bb661 Copyright (c) 2000-2013 the FFmpeg
developers
built on Feb 17 2013 02:37:45 with gcc 4.7.2 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads
--enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r
--enable-gnutls --enable-libass --enable-libbluray --enable-libcaca
--enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-
libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
--enable-libopus --enable-librtmp --enable-libschroedinger --enable-
libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-
libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx
--enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
libavutil 52. 17.101 / 52. 17.101
libavcodec 54. 91.103 / 54. 91.103
libavformat 54. 63.100 / 54. 63.100
libavdevice 54. 3.103 / 54. 3.103
libavfilter 3. 38.100 / 3. 38.100
libswscale 2. 2.100 / 2. 2.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
Input #0, matroska,webm, from 'input.mkv':
Duration: 00:00:12.85, start: 0.000000, bitrate: 6039 kb/s
Stream #0:0(eng): Video: h264 (High), yuv420p, 1920x1080, SAR 1:1 DAR
16:9, 29.97 fps, 29.97 tbr, 20k tbn, 59.94 tbc (default)
[ac3 @ 025ad320] max_analyze_duration 5000000 reached at 5024000
microseconds
[ac3 @ 025ad320] Estimating duration from bitrate, this may be inaccurate
Input #1, ac3, from 'input.ac3':
Duration: 00:00:12.86, start: 0.000000, bitrate: 256 kb/s
Stream #1:0: Audio: ac3, 48000 Hz, stereo, fltp, 256 kb/s
Output #0, matroska, to 'done.mkv':
Metadata:
encoder : Lavf54.63.100
Stream #0:0(eng): Video: h264 (H264 / 0x34363248), yuv420p, 1920x1080
[SAR 1:1 DAR 16:9], q=2-31, 29.97 fps, 1k tbn, 20k tbc (default)
Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz, stereo, 256
kb/s
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #1:0 -> #0:1 (copy)
Press [q] to stop, [?] for help
frame= 385 fps=0.0 q=-1.0 Lsize= 9876kB time=00:00:12.86
bitrate=6289.3kbits/s
video:9468kB audio:402kB subtitle:0 global headers:0kB muxing overhead
0.065323%
}}}
ffmpeg -i done.mkv -an -vcodec copy -y demux.mkv
{{{
ffmpeg version N-50025-gb8bb661 Copyright (c) 2000-2013 the FFmpeg
developers
built on Feb 17 2013 02:37:45 with gcc 4.7.2 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads
--enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r
--enable-gnutls --enable-libass --enable-libbluray --enable-libcaca
--enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-
libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
--enable-libopus --enable-librtmp --enable-libschroedinger --enable-
libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-
libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx
--enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
libavutil 52. 17.101 / 52. 17.101
libavcodec 54. 91.103 / 54. 91.103
libavformat 54. 63.100 / 54. 63.100
libavdevice 54. 3.103 / 54. 3.103
libavfilter 3. 38.100 / 3. 38.100
libswscale 2. 2.100 / 2. 2.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
Input #0, matroska,webm, from 'done.mkv':
Metadata:
ENCODER : Lavf54.63.100
Duration: 00:00:12.93, start: 0.000000, bitrate: 6256 kb/s
Stream #0:0(eng): Video: h264 (High), yuv420p, 1920x1080, SAR 1:1 DAR
16:9, 29.97 fps, 29.97 tbr, 1k tbn, 59.94 tbc (default)
Stream #0:1: Audio: ac3, 48000 Hz, stereo, fltp, 256 kb/s
Output #0, matroska, to 'demux.mkv':
Metadata:
encoder : Lavf54.63.100
Stream #0:0(eng): Video: h264 (H264 / 0x34363248), yuv420p, 1920x1080
[SAR 1:1 DAR 16:9], q=2-31, 29.97 fps, 1k tbn, 1k tbc (default)
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
frame= 385 fps=0.0 q=-1.0 Lsize= 9471kB time=00:00:12.81
bitrate=6055.1kbits/s
video:9468kB audio:0kB subtitle:0 global headers:0kB muxing overhead
0.038442%
}}}
ffmpeg -i done.mkv -acodec copy -vn -y demux.ac3
{{{
ffmpeg version N-50025-gb8bb661 Copyright (c) 2000-2013 the FFmpeg
developers
built on Feb 17 2013 02:37:45 with gcc 4.7.2 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads
--enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r
--enable-gnutls --enable-libass --enable-libbluray --enable-libcaca
--enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-
libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
--enable-libopus --enable-librtmp --enable-libschroedinger --enable-
libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-
libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx
--enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
libavutil 52. 17.101 / 52. 17.101
libavcodec 54. 91.103 / 54. 91.103
libavformat 54. 63.100 / 54. 63.100
libavdevice 54. 3.103 / 54. 3.103
libavfilter 3. 38.100 / 3. 38.100
libswscale 2. 2.100 / 2. 2.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
Input #0, matroska,webm, from 'done.mkv':
Metadata:
ENCODER : Lavf54.63.100
Duration: 00:00:12.93, start: 0.000000, bitrate: 6256 kb/s
Stream #0:0(eng): Video: h264 (High), yuv420p, 1920x1080, SAR 1:1 DAR
16:9, 29.97 fps, 29.97 tbr, 1k tbn, 59.94 tbc (default)
Stream #0:1: Audio: ac3, 48000 Hz, stereo, fltp, 256 kb/s
Output #0, ac3, to 'demux.ac3':
Metadata:
encoder : Lavf54.63.100
Stream #0:0: Audio: ac3, 48000 Hz, stereo, 256 kb/s
Stream mapping:
Stream #0:1 -> #0:0 (copy)
Press [q] to stop, [?] for help
size= 402kB time=00:00:12.93 bitrate= 254.7kbits/s
video:0kB audio:402kB subtitle:0 global headers:0kB muxing overhead
0.000000%
}}}
ffmpeg -i demux.mkv
{{{
ffmpeg version N-50025-gb8bb661 Copyright (c) 2000-2013 the FFmpeg
developers
built on Feb 17 2013 02:37:45 with gcc 4.7.2 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads
--enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r
--enable-gnutls --enable-libass --enable-libbluray --enable-libcaca
--enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-
libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
--enable-libopus --enable-librtmp --enable-libschroedinger --enable-
libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-
libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx
--enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
libavutil 52. 17.101 / 52. 17.101
libavcodec 54. 91.103 / 54. 91.103
libavformat 54. 63.100 / 54. 63.100
libavdevice 54. 3.103 / 54. 3.103
libavfilter 3. 38.100 / 3. 38.100
libswscale 2. 2.100 / 2. 2.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
Input #0, matroska,webm, from 'demux.mkv':
Metadata:
ENCODER : Lavf54.63.100
Duration: 00:00:12.91, start: 0.000000, bitrate: 6008 kb/s
Stream #0:0(eng): Video: h264 (High), yuv420p, 1920x1080, SAR 1:1 DAR
16:9, 29.97 fps, 29.97 tbr, 1k tbn, 59.94 tbc (default)
At least one output file must be specified
}}}
ffmpeg -i demux.ac3
{{{
ffmpeg version N-50025-gb8bb661 Copyright (c) 2000-2013 the FFmpeg
developers
built on Feb 17 2013 02:37:45 with gcc 4.7.2 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads
--enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r
--enable-gnutls --enable-libass --enable-libbluray --enable-libcaca
--enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-
libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
--enable-libopus --enable-librtmp --enable-libschroedinger --enable-
libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-
libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx
--enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
libavutil 52. 17.101 / 52. 17.101
libavcodec 54. 91.103 / 54. 91.103
libavformat 54. 63.100 / 54. 63.100
libavdevice 54. 3.103 / 54. 3.103
libavfilter 3. 38.100 / 3. 38.100
libswscale 2. 2.100 / 2. 2.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
[ac3 @ 0226b420] max_analyze_duration 5000000 reached at 5024000
microseconds
[ac3 @ 0226b420] Estimating duration from bitrate, this may be inaccurate
Input #0, ac3, from 'demux.ac3':
Duration: 00:00:12.86, start: 0.000000, bitrate: 256 kb/s
Stream #0:0: Audio: ac3, 48000 Hz, stereo, fltp, 256 kb/s
At least one output file must be specified
}}}
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2333#comment:2>
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