[MacPorts] #55894: gegl: fails to build against ffmpeg-devel

[MacPorts]

#55894: gegl: fails to build against ffmpeg-devel
---------------------+---------------------
  Reporter:  Ionic   |      Owner:  dbevans
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:  2.4.99
Resolution:          |   Keywords:
      Port:  gegl    |
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Comment (by dbevans):

 Yes, ffmpeg-devel breaks both API and ABI with the current ffmpeg, both
 signs that a new major release with API changes will be coming before
 long.

 In the case of GEGL, the constants CODEC_CAP_TRUNCATED and
 CODEC_FLAG_TRUNCATED where renamed to AV_CODEC_CAP_TRUNCATED and
 AV_CODEC_FLAG_TRUNCATED several years ago.

 The current ffmpeg version includes aliases of the form

 {{{
 #define CODEC_CAP_TRUNCATED AV_CODEC_CAP_TRUNCATED
 #define CODEC_FLAG_TRUNCATED AV_CODEC_FLAG_TRUNCATED
 }}}

 In the latest ffrmpeg-devel these aliases have finally been dropped. The
 fix is relatively simple and I'm testing it now. Both ffmpeg and  ffmpeg-
 devel recognize the newer API.

 There's likely to be similar problems with other ffmpeg dependents when
 building with ffmpeg-devel.

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Ticket URL: <https://trac.macports.org/ticket/55894#comment:1>
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