[MacPorts] #70519: ffmpeg7 @7.0.1 does not build on macOS 10.12 with Xcode 9.2 due to "AVMediaType" type conflict

[MacPorts]

#70519: ffmpeg7 @7.0.1 does not build on macOS 10.12 with Xcode 9.2 due to
"AVMediaType" type conflict
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  Reporter:  andlabs  |      Owner:  mascguy
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:           |   Keywords:
      Port:  ffmpeg7  |
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Comment (by tehcog):

 fyi: ffmpeg7 @7.0.2_2 still fails on mavericks

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Ticket URL: <https://trac.macports.org/ticket/70519#comment:5>
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