[FFmpeg-trac] #11370(avcodec:new): Transcoding single-frame APNG to AVIF results in very long encoding time

[FFmpeg]

#11370: Transcoding single-frame APNG to AVIF results in very long encoding time
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             Reporter:  9e80        |                    Owner:  (none)
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avcodec
              Version:  7.1         |               Resolution:
             Keywords:  libaom-av1  |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  1           |
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Changes (by MasterQuestionable):

 * analyzed:  0 => 1
 * cc: MasterQuestionable (added)
 * component:  ffmpeg => avcodec
 * keywords:  apng, avif, libaom => libaom-av1

Comment:

 ͏    Unsure what's going on with these formats.
 ͏    But FFmpeg seems to decode the input first, then pass the decoded to
 encoder.
 ͏    https://ffmpeg.org/ffmpeg.html#Detailed-description

 ͏    Maybe just reproducible with the same video data..? (not necessarily
 in PNG)
 ͏    And what happens when outputting in other containers? (or just "-f
 null"?)
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Ticket URL: <https://trac.ffmpeg.org/ticket/11370#comment:2>
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