[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 er.anshul.maheshwari@…):

 if I put same fps of input and output, then frame are missing

 {{{
 ffmpeg -r 1/5  -f concat -i /tmp/tmpsaR4EA -i audio/sound.mp3 -vf
 "format=yuv420p,scale=640x480,subtitles=/tmp/tmpKu6UJ3.srt,fps=1/5"
 "output/Great_Lakes_region_timeshare_camp.mp4"

 }}}

 but if I don't put the fps filter flag at output then every thing is all
 right

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Ticket URL: <https://trac.ffmpeg.org/ticket/1578#comment:7>
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