[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:21 janngobble]:
 > Replying to [comment:20 badger200]:
 > > @tobias : 6.1 breaks videotoolboxenc.c due to
 > > > libavcodec/videotoolboxenc.c:1185:40: error: use of undeclared
 identifier 'kVTCompressionPropertyKey_EncoderID';
 > > Which is 10.13 specific. I’m building on 10.9. 6.0 is built and
 installed currently.
 >
 > see: https://trac.macports.org/ticket/68720
 >
 > In essence, kVTCompressionPropertyKey_EncoderID was introduced in 10.13.
 So, if there's no version test when using using
 kVTCompressionPropertyKey_EncoderID then it will break.

 FYI, this was fixed a few days ago, per the following:
 comment:10:issue:68720

-- 
Ticket URL: <https://trac.macports.org/ticket/65623#comment:24>
MacPorts <https://www.macports.org/>
Ports system for macOS