[MacPorts] #68936: ffmpeg6 "No decoder could be found for codec ac4"

[MacPorts]

#68936: ffmpeg6 "No decoder could be found for codec ac4"
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 Reporter:  Behinder            |      Owner:  (none)
     Type:  enhancement         |     Status:  new
 Priority:  Normal              |  Milestone:
Component:  ports               |    Version:
 Keywords:  ffmpeg6,libavcodec  |       Port:  ffmpeg6
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 In 6.1 release note there is a passage:
 "Raw AC-4 muxer and demuxer"

 however when i do ffprobe6 on sample atsc3 files it gives me that error. I
 post it here as it is difficult to contact ffmpeg developers(it requiers
 to sign up for various mailing list, and there is no single trac system).
 I am not sure if "muxer" and "demuxer" is the same as "decoder", and there
 is a long discussion about support ac4 dated few years back. patches were
 provided then they stopped working after version 6, then some people
 repatched and claiming it's working on forked repos but I am not sure if
 the patches was merged, so whole situation is confusing at best.

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Ticket URL: <https://trac.macports.org/ticket/68936>
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