[FFmpeg-trac] #10142(avfilter:new): scdet filter not logging some frames score

[FFmpeg]

#10142: scdet filter not logging some frames score
----------------------------------+----------------------------------
             Reporter:  colemarc  |                     Type:  defect
               Status:  new       |                 Priority:  minor
            Component:  avfilter  |                  Version:  5.1.2
             Keywords:  scdet     |               Blocked By:
             Blocking:            |  Reproduced by developer:  0
Analyzed by developer:  0         |
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 `ffmpeg version 5.1.1-static https://johnvansickle.com/ffmpeg/  Copyright
 (c) 2000-2022 the FFmpeg developers`

 1000.mkv has exactly 1000 frames.
 scdet filter logs scores for only 866 frames.

 {{{
 $ ffmpeg -nostdin -nostats -i 1000.mkv -map 0:v -filter:v
 "scdet=threshold=0:sc_pass=0,metadata=mode=print:key=lavfi.scd.score,showinfo=checksum=0"
 -f null - 2>&1 | grep iskey | wc -l
 1000

 $ ffmpeg -nostdin -nostats -i 1000.mkv -map 0:v -filter:v
 "scdet=threshold=0:sc_pass=0,metadata=mode=print:key=lavfi.scd.score,showinfo=checksum=0"
 -f null - 2>&1 | grep scdet | wc -l
 866
 }}}

 However the scdet filter forwards all 1000 frames and sets frame metadata
 for each of them.

 {{{
 $ ffmpeg -nostdin -nostats -i 1000.mkv -map 0:v -filter:v
 "scdet=threshold=0:sc_pass=0,metadata=mode=print:key=lavfi.scd.score,showinfo=checksum=0"
 -f null - 2>&1 | grep 'Parsed_metadata_1.*lavfi.scd.score' | wc -l
 1000
 }}}

 All the frames missed in the scdet log have lavfi.scd.score=0.000, but a
 few frames with lavfi.scd.score=0.000 get logged.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/10142>
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