[FFmpeg-trac] #2824(undetermined:new): support metadata output in avectroscope filter

[FFmpeg]

#2824: support metadata output in avectroscope filter
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               Reporter:  dericed    |                  Owner:
                   Type:             |                 Status:  new
  enhancement                        |              Component:
               Priority:  normal     |  undetermined
                Version:  git-       |               Keywords:
  master                             |  avectorscope
             Blocked By:             |               Blocking:
Reproduced by developer:  0          |  Analyzed by developer:  0
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 Summary of the enhancement request:

 I need to test a collection of media files with stereo tracks to identify
 ones that are 180 degrees out of phase (or close to it). I looked at the
 new avectorscope filter and although it does well to visualize the phase
 relationship within a stereo track it doesn't output a quantified value of
 the phase relationship.
 I suggest an output similar to ebur128 where the phase percentage is
 reported per audio frame and then summarized at the end of the analysis.

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2824>
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