[MacPorts] #65623: ffmpeg: update to 6.x

[MacPorts]

#65623: ffmpeg: update to 6.x
-------------------------+----------------------
  Reporter:  janngobble  |      Owner:  mascguy
      Type:  update      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.7.2
Resolution:              |   Keywords:
      Port:  ffmpeg      |
-------------------------+----------------------

Comment (by mascguy):

 Replying to [comment:14 mohd-akram]:
 > I've updated the list. Most ports are likely to build. Other package
 managers have also moved to updated FFmpeg versions, so it should be
 doable at this point. I've created some tickets for ports that require an
 update, so we can likely start with updating those.

 If you'd like folks to also migrate to `ffmpeg6`, you'll want to
 explicitly mention that in each ticket.

-- 
Ticket URL: <https://trac.macports.org/ticket/65623#comment:15>
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