[FFmpeg-trac] #1578(undetermined:open): variable FPS incorrect frame length

[FFmpeg]

#1578: variable FPS incorrect frame length
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             Reporter:  kubabrecka   |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  normal       |                Component:
              Version:  git-master   |  undetermined
             Keywords:  fps bounty   |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  1
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Comment (by rogerdpack):

 In this case it would be just to make "ffmpeg -f lavfi -i
 testsrc=duration=30:rate=1 -r 27 out.mp4" display the first frame for a
 full second correctly [like -vf fps does correctly today].  Currently the
 first frame is ther but only for a split second, which seems off
 somehow...I'd expect it to be there for a second...thanks for your
 interest!

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Ticket URL: <https://trac.ffmpeg.org/ticket/1578#comment:18>
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