[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 mohd-akram):

 Strangely, I didn't get a notification for your response. Perhaps we
 should assemble a list of ports that depend on ffmpeg, and tick off the
 ones that support version 6 upstream, linking to relevant PRs/commits.
 This way we have an idea of the scope of the compatibility issues at
 least. Just to get it started if there is no such list yet - `port echo
 depends:ffmpeg | grep -v '^py[0-9]'` returns:

 - aubio
 - audacious-plugins
 - audacity [https://github.com/audacity/audacity/issues/4381 Supported]
 - audacity-devel [https://github.com/audacity/audacity/issues/4381
 Supported]
 - audacity-legacy
 - av1an [https://github.com/master-of-zen/Av1an/pull/729 Supported]
 - baresip
 - blender
 - chromaprint
 - cmus [https://github.com/cmus/cmus/pull/1254 Pending]
 - dosbox-x
 - dvbcut
 - ffmpegthumbnailer
 - ffmpegthumbs
 - ffms2
 - FreeRDP [https://github.com/FreeRDP/FreeRDP/pull/8941 Supported]
 - geeqie
 - gegl
 - gegl-0.3
 - gegl-devel
 - gmic
 - gmic-clib
 - gmic-gimp
 - gmic-lib
 - gmic-qt
 - goldendict
 - gpac [https://github.com/gpac/gpac/issues/2406 Supported]
 - kdemultimedia4
 - kfilemetadata
 - libdlna
 - libextractor
 - libopenshot
 - libpiano
 - libquicktime
 - libquicktime-devel
 - libvideogfx
 - libVLC2
 - mat2
 - mediatomb
 - mlt
 [https://github.com/mltframework/mlt/commit/6d79a3c2d52a986601e894c655c83fe6e17dbef4
 Supported]
 - mlt-qt5
 - moc
 - MP4Joiner
 - mpv [https://github.com/mpv-player/mpv/pull/11456 Supported]
 - musikcube
 [https://github.com/clangen/musikcube/commit/2372eb1e783362048022c3329bfc4d6287b2a710
 Supported]
 - nepomuk-core
 - netgen
 - notcurses
 - octave-video
 - opencv3
 - opencv3-devel
 - opencv4 [https://github.com/opencv/opencv/pull/22357 Supported]
 - opencv4-devel [https://github.com/opencv/opencv/pull/22357 Supported]
 - openimageio
 - OpenSceneGraph
 - OpenSceneGraph-devel
 - Pangolin
 - paraview
 - pHash
 - pianobar
 - py-imageio-ffmpeg
 - qt5-qtwebengine
 - qt6-qtmultimedia
 - qt6-qtwebengine
 - qt513-qtwebengine
 - ReadyMedia
 - scrcpy
 - SDRangel
 - streamlink
 - strigi
 - synfig
 - tovid
 - transcode
 - tumbler
 - unpaper
 - vapoursynth
 - VLC2
 - wxsvg
 - xine-lib
 - xmms2
 - yorick-av
 - beets
 - beets-devel
 - freac
 - get_iplayer
 - impressive
 - reddsaver
 - shenidam
 - vcs
 - vhs
 - youtube-dl
 - yt-dlp

-- 
Ticket URL: <https://trac.macports.org/ticket/65623#comment:12>
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