[MacPorts] #71770: mlt @7.24.0_0+qt6 build failure

[MacPorts]

#71770: mlt @7.24.0_0+qt6 build failure
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  Reporter:  amadeus24  |      Owner:  ddennedy
      Type:  defect     |     Status:  assigned
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.10.5
Resolution:             |   Keywords:
      Port:  mlt        |
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Comment (by RJVB):

 Hopefully someone will pick up the idea to register that build conflict,
 maybe even create 2 variants for selecting the FFmpeg variant to use since
 mlt supports both.

 Is there an official upstream standpoint about co-installing the 2 FFmpeg
 versions? If not (or if it isn't "thou shan't") then we should probably
 file an upstream ticket about it, esp. if @ddennedy has an idea how to
 avoid it and can confirm that it's not an issue with the mlt CMake build
 system.

 FWIW: I've seen the issue with port:QMPlay2

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Ticket URL: <https://trac.macports.org/ticket/71770#comment:9>
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