[FFmpeg-trac] #1339(avfilter:new): Auto insert fps filter as adapter for overlay filter inputs with different framerates

FFmpeg trac at avcodec.org
Thu Aug 9 14:19:51 CEST 2012


#1339: Auto insert fps filter as adapter for overlay filter inputs with different
framerates
-------------------------------------+-------------------------------------
             Reporter:  annorax      |                    Owner:
                 Type:  enhancement  |                   Status:  new
             Priority:  wish         |                Component:  avfilter
              Version:  git-master   |               Resolution:
             Keywords:  fps overlay  |               Blocked By:
  filter                             |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by Cigaes):

 Replying to [comment:8 cehoyos]:
 > What happens if a higher frame-rate was manually specified? Does ffmpeg
 just repeat the same combination of main and overlay or does it also look
 for every repeated main frame which overlay frame is used?

 You mean with {{{-i ... -i ... -filter_complex ...overlay... -r something
 output}}}?

 AFAIK, the effect of {{{-r}}} comes completely after the effects of
 filters, so depending on the value of {{{-vsync}}} it will result on the
 frame being duplicated as you describe.

 IMHO, there are too many possible circumstances to be able to "Do What I
 Mean" always, so it is best to keep everything simple so accurate results
 can be achieved with the correct combination of filters without bad
 surprises.

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1339#comment:9>
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