[MacPorts] #39161: ffmpeg-1.2.1 + openjpeg-2.0.0 conflict + proposed fix

[MacPorts]

#39161: ffmpeg-1.2.1 + openjpeg-2.0.0 conflict + proposed fix
---------------------+--------------------------------
 Reporter:  david@…  |      Owner:  macports-tickets@…
     Type:  defect   |     Status:  new
 Priority:  Normal   |  Milestone:
Component:  ports    |    Version:  2.1.3
 Keywords:           |       Port:  ffmpeg
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 Problem occurs during normal 'port upgrade ffmpeg' since openjpeg-2.0.0
 was released.

 Problem surfaces as "ERROR: libopenjpeg not found" in the configure step,
 because ffmpeg appears to use the openjpeg-1.5 API which appears to
 conflict with the openjpeg-2.0 API.

 https://ffmpeg.org/trac/ffmpeg/ticket/2016 talks about this.

 While I'm unable to find the ticket that fixed this in ffmpeg devel, I'm
 building the latest git pull of ffmpeg on an Ubuntu box and this build
 picks up either openjpeg 1.5 or 2.0 (whichever is installed).

 This suggests that current ffmpeg-1.2.1 Portfile depends_lib changes from
 port:openjpeg to port:openjpeg15.

 Then when ffmpeg-1.2.2 releases change this to port:openjpeg which picks
 up openjpeg-2.0.0 (which is the version the unqualified openjpeg port
 references).

 This also suggest that both openjpeg + openjpeg15 must have a conflicts
 statement added (conflicting with each other), so only one version of
 openjpeg can be installed.

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Ticket URL: <https://trac.macports.org/ticket/39161>
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