[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):

 As an intermediate step, port `ffmpeg-upstream` has been segregated, so
 that it can now be installed alongside `ffmpeg`. And as a starting point,
 binaries are symlinked in `${prefix}/bin`:

 {{{
   /opt/local/bin/ffmpeg6
   /opt/local/bin/ffplay6
   /opt/local/bin/ffprobe6
 }}}

 There's still more work to be done - such as symlinking the manpages and
 such - but making progress.

-- 
Ticket URL: <https://trac.macports.org/ticket/65623#comment:9>
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