[MacPorts] #54064: port:mlt{, -qt5} : backported upstream patch, OpenCV & SDL tweaks

[MacPorts]

#54064: port:mlt{,-qt5} : backported upstream patch, OpenCV & SDL tweaks
--------------------------+----------------------
  Reporter:  RJVB         |      Owner:
      Type:  enhancement  |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:  haspatch
      Port:  mlt mlt-qt5  |
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Comment (by mf2k):

 Please use the normal syntax for adding a {{{revision}}} line and not
 append it to the {{{version}}} line. Also, {{{revision}}} should be 1, not
 2, since it starts at 0.

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Ticket URL: <https://trac.macports.org/ticket/54064#comment:2>
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