[FFmpeg-trac] #4146(ffmpeg:new): zoompan progress stops after 2 sec when it is overlayed

FFmpeg trac at avcodec.org
Mon Dec 1 15:59:45 CET 2014


#4146: zoompan progress stops after 2 sec when it is overlayed
-------------------------------------+----------------------------------
             Reporter:  hgerard      |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:  ffmpeg
              Version:  unspecified  |               Resolution:
             Keywords:  zoompan      |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by Cigaes):

 The input of your zoompan filter has a frame every 1/25 second, but the
 zoompan filter will duplicate each one 250, making it 10 seconds long.
 Thus:

 in: t=0.00 → out: t∈[0.00, 10.00[
 in: t=0.04 → out: t∈[0.04, 10.04[
 in: t=0.08 → out: t∈[0.08, 10.08[
 ...

 The output segments overlap instead of being monotonic. You need to either
 set the input frame rate to make them monotonic or completely override the
 output timestamps.

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Ticket URL: <https://trac.ffmpeg.org/ticket/4146#comment:1>
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