[FFmpeg-trac] #6703(undetermined:new): ffmpeg rounds duration_ts and duration

FFmpeg trac at avcodec.org
Sat Sep 30 12:34:48 EEST 2017


#6703: ffmpeg rounds duration_ts and duration
-------------------------------------+-------------------------------------
             Reporter:  mucikiki     |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:  ntsc,        |               Blocked By:
  duration, duration_ts,             |  Reproduced by developer:  0
  codec_time_base                    |
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:

 if you use NTSC videos (29.97fps), duration_ts and duration are rounded,
 so codec_time_base is wrong.

 For example, if input video has duration=74.574500, it become
 duration=74.575000 (note the last 3 zeros), if duration=60.093367 it
 become duration=60.094000.

 How to reproduce:
 {{{
 /usr/local/bin/ffmpeg -i input.mp4 -r ntsc -c:v libx264 -profile:v main
 -level:v 3.1 -crf 18 output.mp4
 }}}

 ffmpeg version N-85647-g59d219b
 built with gcc 4.9.2 (Debian 4.9.2-10)

--
Ticket URL: <https://trac.ffmpeg.org/ticket/6703>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker


More information about the FFmpeg-trac mailing list