[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          |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  1
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Comment (by rogerdpack):

 If this is a duplicate of #1925 (which it may be), then it is also
 reproducible with this:

 {{{
 ffmpeg -f lavfi -i testsrc=duration=3:rate=1 -r 27 out.mp4
 }}}

 (the first frame should display a 0 and last for 1s, instead it just flits
 by).  Interestingly, if you remove the "-r 27" from the output, then it
 works as expected.

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1578#comment:3>
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