[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>
FFmpeg <http://ffmpeg.org>
FFmpeg issue tracker


More information about the FFmpeg-trac mailing list