[FFmpeg-trac] #259(undetermined:open): framerate detection does not work properly.
FFmpeg
trac at avcodec.org
Tue Jan 1 16:57:21 CET 2013
#259: framerate detection does not work properly.
-------------------------------------+-------------------------------------
Reporter: mbosner | Owner:
Type: defect | Status: open
Priority: normal | Component:
Version: unspecified | undetermined
Keywords: vc1 | Resolution:
pulldown | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Comment (by cehoyos):
Samples uploaded to http://samples.ffmpeg.org/ffmpeg-bugs/trac/ticket259/
The following command lines do not lead to frame duplication (and smaller
files are written) if "-r 24" is used:
{{{
$ ffmpeg -i wrong_framerate.mkv -strict -2 -qscale 2 -vframes 196 out1.mov
ffmpeg version N-48375-gc14f8a5 Copyright (c) 2000-2013 the FFmpeg
developers
built on Jan 1 2013 16:29:16 with gcc 4.7 (SUSE Linux)
configuration: --enable-gpl --disable-indev=jack
libavutil 52. 13.100 / 52. 13.100
libavcodec 54. 85.100 / 54. 85.100
libavformat 54. 58.102 / 54. 58.102
libavdevice 54. 3.102 / 54. 3.102
libavfilter 3. 30.102 / 3. 30.102
libswscale 2. 1.103 / 2. 1.103
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
Input #0, matroska,webm, from 'wrong_framerate.mkv':
Metadata:
creation_time : 2009-05-12 23:34:50
Duration: 01:47:42.19, start: 0.000000, bitrate: 12 kb/s
Stream #0:0: Video: vc1 (Advanced) (WVC1 / 0x31435657), yuv420p,
1920x1080 [SAR 1:1 DAR 16:9], 29.97 fps, 29.97 tbr, 1k tbn, 59.94 tbc
(default)
Stream #0:1: Audio: eac3, 48000 Hz, 5.1(side), fltp, 1536 kb/s
(default)
Stream #0:2: Audio: eac3, 48000 Hz, 5.1(side), fltp, 448 kb/s
Please use -q:a or -q:v, -qscale is ambiguous
Output #0, mov, to 'out1.mov':
Metadata:
encoder : Lavf54.58.102
Stream #0:0: Video: mpeg4 (mp4v / 0x7634706D), yuv420p, 1920x1080 [SAR
1:1 DAR 16:9], q=2-31, 200 kb/s, 30k tbn, 29.97 tbc (default)
Stream #0:1: Audio: aac (mp4a / 0x6134706D), 48000 Hz, 5.1(side),
fltp, 128 kb/s (default)
Stream mapping:
Stream #0:0 -> #0:0 (vc1 -> mpeg4)
Stream #0:1 -> #0:1 (eac3 -> aac)
Press [q] to stop, [?] for help
frame= 196 fps= 63 q=2.0 Lsize= 3522kB time=00:00:06.53
bitrate=4411.3kbits/s dup=42 drop=0
video:3467kB audio:47kB subtitle:0 global headers:0kB muxing overhead
0.223866%
}}}
{{{
$ ffmpeg -i JerkyVC1Pulldown.EVO -strict -2 -qscale 2 -vframes 178 out.mov
ffmpeg version N-48375-gc14f8a5 Copyright (c) 2000-2013 the FFmpeg
developers
built on Jan 1 2013 16:29:16 with gcc 4.7 (SUSE Linux)
configuration: --enable-gpl --disable-indev=jack
libavutil 52. 13.100 / 52. 13.100
libavcodec 54. 85.100 / 54. 85.100
libavformat 54. 58.102 / 54. 58.102
libavdevice 54. 3.102 / 54. 3.102
libavfilter 3. 30.102 / 3. 30.102
libswscale 2. 1.103 / 2. 1.103
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
Input #0, mpeg, from 'JerkyVC1Pulldown.EVO':
Duration: 00:00:05.90, start: 0.036744, bitrate: 13875 kb/s
Stream #0:0[0xfd55]: Video: vc1 (Advanced), yuv420p, 1920x1080 [SAR
1:1 DAR 16:9], 28.58 fps, 29.97 tbr, 90k tbn, 59.94 tbc
Stream #0:1[0xc4]: Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s
Stream #0:2[0xc3]: Audio: eac3, 48000 Hz, 5.1(side), fltp, 768 kb/s
Stream #0:3[0xc2]: Audio: eac3, 48000 Hz, 5.1(side), fltp, 768 kb/s
Stream #0:4[0x89]: Audio: dts (DTS), 48000 Hz, 5.1(side), fltp, 1536
kb/s
Stream #0:5[0xc0]: Audio: eac3, 48000 Hz, 5.1(side), fltp, 1536 kb/s
Please use -q:a or -q:v, -qscale is ambiguous
Output #0, mov, to 'out.mov':
Metadata:
encoder : Lavf54.58.102
Stream #0:0: Video: mpeg4 (mp4v / 0x7634706D), yuv420p, 1920x1080 [SAR
1:1 DAR 16:9], q=2-31, 200 kb/s, 30k tbn, 29.97 tbc
Stream #0:1: Audio: aac (mp4a / 0x6134706D), 48000 Hz, 5.1(side),
fltp, 128 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (vc1 -> mpeg4)
Stream #0:2 -> #0:1 (eac3 -> aac)
Press [q] to stop, [?] for help
frame= 178 fps= 61 q=2.0 Lsize= 2978kB time=00:00:05.93
bitrate=4107.8kbits/s dup=35 drop=0
video:2918kB audio:53kB subtitle:0 global headers:0kB muxing overhead
0.214350%
}}}
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/259#comment:6>
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