[FFmpeg-trac] #10232(undetermined:new): drmeter filter can return invalid DR value (negative or nan)

[FFmpeg]

#10232: drmeter filter can return invalid DR value (negative or nan)
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             Reporter:  ocococ        |                     Type:  defect
               Status:  new           |                 Priority:  normal
            Component:  undetermined  |                  Version:  5.1.2
             Keywords:                |               Blocked By:
             Blocking:                |  Reproduced by developer:  0
Analyzed by developer:  0             |
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 With some of my .flac files, value returned by drmeter filter can be
 negative or even "nan", using ffmpeg version 5.1.2 built on macos 12.6.3,
 running on M2 processor.

 How to reproduce:
 {{{
 % ffmpeg -hide_banner -i sample.flac -af drmeter -f null - 2>&1 | grep -Eo
 'Overall DR: .+'
 }}}
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Ticket URL: <https://trac.ffmpeg.org/ticket/10232>
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