[MacPorts] #70726: Update ffmpeg dependency to ffmpeg6 to gain modern video codecs.

[MacPorts]

#70726: Update ffmpeg dependency to ffmpeg6 to gain modern video codecs.
-------------------------+------------------------------
 Reporter:  cgilles      |      Owner:  (none)
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:
 Keywords:               |       Port:  qt6-qtmultimedia
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 Currently, qt6-multimedia is compiled with ffmpeg version 4. Qt6Multimedia
 is compatible with ffmpeg version 6.1 :

 https://doc.qt.io/qt-6/qtmultimedia-attribution-ffmpeg.html

 and the current ffmpeg6 port is the 6.1.1:

 https://ports.macports.org/port/ffmpeg6/

 Migrating from ffmpeg4 to ffmpeg 6 will gain new and modern codecs
 support.

 Gilles Caulier

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Ticket URL: <https://trac.macports.org/ticket/70726>
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