[FFmpeg-trac] #8464(avformat:closed): `outpoint` directive of `concat` demuxer may be off by 1 frame

FFmpeg trac at avcodec.org
Thu Jan 9 01:56:54 EET 2020

#8464: `outpoint` directive of `concat` demuxer may be off by 1 frame
             Reporter:  gdgsdg123   |                    Owner:
                 Type:  defect      |                   Status:  closed
             Priority:  normal      |                Component:  avformat
              Version:  git-master  |               Resolution:  invalid
             Keywords:  concat      |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
Changes (by cus):

 * status:  reopened => closed
 * resolution:   => invalid


 This is a simple timestamp precision issue. Input file is 60 fps,
 therefore the timestamp of the last frame is *exactly* 5287/60 which is
 88.116666666666 (infinite number of sixes), which is indeed smaller then
 the outpoint you specified 88.116667 therefore the last frame is not
 included. I suggest you round upwards when you specify the outpoint.

Ticket URL: <https://trac.ffmpeg.org/ticket/8464#comment:3>
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