[FFmpeg-trac] #2506(undetermined:new): Guess output frame rate if input timebase denominator is huge
FFmpeg
trac at avcodec.org
Sun Apr 28 14:22:49 CEST 2013
#2506: Guess output frame rate if input timebase denominator is huge
-------------------------------------+-------------------------------------
Reporter: cehoyos | Owner:
Type: enhancement | Status: new
Priority: wish | Component:
Version: git-master | undetermined
Keywords: ogg mpeg4 | Resolution:
videolan | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Description changed by cehoyos:
Old description:
> (Sample from videolan ticket #8486)
> I will upload a sample from a vlc ticket that can be transcoded fine with
> ffmpeg if a framerate is specified, fails with default framerate:
> {{{
> $ ffmpeg -i File\ 50MB\ DG\ Split\ 206\ Video\ Issue.ogm -qscale 2
> out.avi
> ffmpeg version N-52542-g5149407 Copyright (c) 2000-2013 the FFmpeg
> developers
> built on Apr 28 2013 14:19:06 with gcc 4.7 (SUSE Linux)
> configuration: --enable-gpl --disable-indev=jack
> libavutil 52. 27.101 / 52. 27.101
> libavcodec 55. 6.100 / 55. 6.100
> libavformat 55. 3.100 / 55. 3.100
> libavdevice 55. 0.100 / 55. 0.100
> libavfilter 3. 61.101 / 3. 61.101
> libswscale 2. 2.100 / 2. 2.100
> libswresample 0. 17.102 / 0. 17.102
> libpostproc 52. 3.100 / 52. 3.100
> Input #0, ogg, from 'File 50MB DG Split 206 Video Issue.ogm':
> Duration: 00:04:41.11, start: 0.000000, bitrate: 1492 kb/s
> Stream #0:0: Video: mpeg4 (XVID / 0x44495658), yuv420p, 576x432,
> 23.98 fps, 23.98 tbr, 23.98 tbn, 23.98 tbc
> Stream #0:1(English): Audio: vorbis, 48000 Hz, stereo, fltp, 89 kb/s
> Stream #0:2(Japanese): Audio: vorbis, 48000 Hz, stereo, fltp, 89 kb/s
> Stream #0:3(English): Subtitle: text
> Please use -q:a or -q:v, -qscale is ambiguous
> [mpeg4 @ 0x3226520] timebase 417083/10000000 not supported by MPEG 4
> standard, the maximum admitted value for the timebase denominator is
> 65535
> Output #0, avi, to 'out.avi':
> Stream #0:0: Video: mpeg4, yuv420p, 576x432, q=2-31, 200 kb/s, 90k
> tbn, 23.98 tbc
> Stream #0:1(English): Audio: ac3, 48000 Hz, stereo, fltp
> Stream mapping:
> Stream #0:0 -> #0:0 (mpeg4 -> mpeg4)
> Stream #0:1 -> #0:1 (vorbis -> ac3)
> Error while opening encoder for output stream #0:0 - maybe incorrect
> parameters such as bit_rate, rate, width or height
> }}}
> {{{
> $ ffmpeg -i File\ 50MB\ DG\ Split\ 206\ Video\ Issue.ogm -qscale 2 -r
> 24000/1001 out.avi
> ffmpeg version N-52542-g5149407 Copyright (c) 2000-2013 the FFmpeg
> developers
> built on Apr 28 2013 14:19:06 with gcc 4.7 (SUSE Linux)
> configuration: --enable-gpl --disable-indev=jack
> libavutil 52. 27.101 / 52. 27.101
> libavcodec 55. 6.100 / 55. 6.100
> libavformat 55. 3.100 / 55. 3.100
> libavdevice 55. 0.100 / 55. 0.100
> libavfilter 3. 61.101 / 3. 61.101
> libswscale 2. 2.100 / 2. 2.100
> libswresample 0. 17.102 / 0. 17.102
> libpostproc 52. 3.100 / 52. 3.100
> Input #0, ogg, from 'File 50MB DG Split 206 Video Issue.ogm':
> Duration: 00:04:41.11, start: 0.000000, bitrate: 1492 kb/s
> Stream #0:0: Video: mpeg4 (XVID / 0x44495658), yuv420p, 576x432,
> 23.98 fps, 23.98 tbr, 23.98 tbn, 23.98 tbc
> Stream #0:1(English): Audio: vorbis, 48000 Hz, stereo, fltp, 89 kb/s
> Stream #0:2(Japanese): Audio: vorbis, 48000 Hz, stereo, fltp, 89 kb/s
> Stream #0:3(English): Subtitle: text
> Please use -q:a or -q:v, -qscale is ambiguous
> Output #0, avi, to 'out.avi':
> Metadata:
> ISFT : Lavf55.3.100
> Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 576x432,
> q=2-31, 200 kb/s, 23.98 tbn, 23.98 tbc
> Stream #0:1(English): Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz,
> stereo, fltp, 192 kb/s
> Stream mapping:
> Stream #0:0 -> #0:0 (mpeg4 -> mpeg4)
> Stream #0:1 -> #0:1 (vorbis -> ac3)
> Press [q] to stop, [?] for help
> frame= 6739 fps=1165 q=2.0 Lsize= 96184kB time=00:04:41.19
> bitrate=2802.1kbits/s
> video:89217kB audio:6590kB subtitle:0 global headers:0kB muxing overhead
> 0.393439%
> }}}
New description:
(Sample from videolan ticket 8486)
I will upload a sample from a vlc ticket that can be transcoded fine with
ffmpeg if a framerate is specified, fails with default framerate:
{{{
$ ffmpeg -i File\ 50MB\ DG\ Split\ 206\ Video\ Issue.ogm -qscale 2 out.avi
ffmpeg version N-52542-g5149407 Copyright (c) 2000-2013 the FFmpeg
developers
built on Apr 28 2013 14:19:06 with gcc 4.7 (SUSE Linux)
configuration: --enable-gpl --disable-indev=jack
libavutil 52. 27.101 / 52. 27.101
libavcodec 55. 6.100 / 55. 6.100
libavformat 55. 3.100 / 55. 3.100
libavdevice 55. 0.100 / 55. 0.100
libavfilter 3. 61.101 / 3. 61.101
libswscale 2. 2.100 / 2. 2.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 3.100 / 52. 3.100
Input #0, ogg, from 'File 50MB DG Split 206 Video Issue.ogm':
Duration: 00:04:41.11, start: 0.000000, bitrate: 1492 kb/s
Stream #0:0: Video: mpeg4 (XVID / 0x44495658), yuv420p, 576x432, 23.98
fps, 23.98 tbr, 23.98 tbn, 23.98 tbc
Stream #0:1(English): Audio: vorbis, 48000 Hz, stereo, fltp, 89 kb/s
Stream #0:2(Japanese): Audio: vorbis, 48000 Hz, stereo, fltp, 89 kb/s
Stream #0:3(English): Subtitle: text
Please use -q:a or -q:v, -qscale is ambiguous
[mpeg4 @ 0x3226520] timebase 417083/10000000 not supported by MPEG 4
standard, the maximum admitted value for the timebase denominator is 65535
Output #0, avi, to 'out.avi':
Stream #0:0: Video: mpeg4, yuv420p, 576x432, q=2-31, 200 kb/s, 90k
tbn, 23.98 tbc
Stream #0:1(English): Audio: ac3, 48000 Hz, stereo, fltp
Stream mapping:
Stream #0:0 -> #0:0 (mpeg4 -> mpeg4)
Stream #0:1 -> #0:1 (vorbis -> ac3)
Error while opening encoder for output stream #0:0 - maybe incorrect
parameters such as bit_rate, rate, width or height
}}}
{{{
$ ffmpeg -i File\ 50MB\ DG\ Split\ 206\ Video\ Issue.ogm -qscale 2 -r
24000/1001 out.avi
ffmpeg version N-52542-g5149407 Copyright (c) 2000-2013 the FFmpeg
developers
built on Apr 28 2013 14:19:06 with gcc 4.7 (SUSE Linux)
configuration: --enable-gpl --disable-indev=jack
libavutil 52. 27.101 / 52. 27.101
libavcodec 55. 6.100 / 55. 6.100
libavformat 55. 3.100 / 55. 3.100
libavdevice 55. 0.100 / 55. 0.100
libavfilter 3. 61.101 / 3. 61.101
libswscale 2. 2.100 / 2. 2.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 3.100 / 52. 3.100
Input #0, ogg, from 'File 50MB DG Split 206 Video Issue.ogm':
Duration: 00:04:41.11, start: 0.000000, bitrate: 1492 kb/s
Stream #0:0: Video: mpeg4 (XVID / 0x44495658), yuv420p, 576x432, 23.98
fps, 23.98 tbr, 23.98 tbn, 23.98 tbc
Stream #0:1(English): Audio: vorbis, 48000 Hz, stereo, fltp, 89 kb/s
Stream #0:2(Japanese): Audio: vorbis, 48000 Hz, stereo, fltp, 89 kb/s
Stream #0:3(English): Subtitle: text
Please use -q:a or -q:v, -qscale is ambiguous
Output #0, avi, to 'out.avi':
Metadata:
ISFT : Lavf55.3.100
Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 576x432,
q=2-31, 200 kb/s, 23.98 tbn, 23.98 tbc
Stream #0:1(English): Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz,
stereo, fltp, 192 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (mpeg4 -> mpeg4)
Stream #0:1 -> #0:1 (vorbis -> ac3)
Press [q] to stop, [?] for help
frame= 6739 fps=1165 q=2.0 Lsize= 96184kB time=00:04:41.19
bitrate=2802.1kbits/s
video:89217kB audio:6590kB subtitle:0 global headers:0kB muxing overhead
0.393439%
}}}
--
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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2506#comment:1>
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