[FFmpeg-trac] #6078(undetermined:closed): Duplicate 1st frame

FFmpeg trac at avcodec.org
Sat Jan 14 11:54:23 EET 2017

#6078: Duplicate 1st frame
             Reporter:  sorath       |                    Owner:
                 Type:  defect       |                   Status:  closed
             Priority:  normal       |                Component:
              Version:  git-master   |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |  worksforme
Analyzed by developer:  0            |               Blocked By:
                                     |  Reproduced by developer:  0

Comment (by ubitux):

 That's probably because they work on a constant frame rate default.

 You can use -vsync vfr to copy this behavior with ffmpeg. You will have
 the frame accuracy, but you will loose the "timings": images don't have
 timestamps, so it's assuming constant frame rate, and thus has to
 duplicate to keep playback as correct as possible.

Ticket URL: <https://trac.ffmpeg.org/ticket/6078#comment:7>
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