[MacPorts] #61668: ffmpeg 4.3.1: fails to install on Apple Silicon

[MacPorts]

#61668: ffmpeg 4.3.1: fails to install on Apple Silicon
-----------------------+----------------------
  Reporter:  jpanetta  |      Owner:  dbevans
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:
      Port:  ffmpeg    |
-----------------------+----------------------

Comment (by ryandesign):

 Replying to [comment:6 ryandesign]:
 > You can't vary the port version in a variant. The portindex does not
 accommodate that.

 In addition, you've downgraded the version of librsvg for some users
 without increasing the epoch which would be necessary to deliver that
 change to those users.

 So for these reasons the change should be reverted, please.

-- 
Ticket URL: <https://trac.macports.org/ticket/61668#comment:10>
MacPorts <https://www.macports.org/>
Ports system for macOS