[MacPorts] #56417: transcode @1.1.7_21 fails to build with ffmpeg 4

[MacPorts]

#56417: transcode @1.1.7_21 fails to build with ffmpeg 4
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  Reporter:  tehcog     |      Owner:  Liontooth
      Type:  defect     |     Status:  assigned
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.4.3
Resolution:             |   Keywords:
      Port:  transcode  |
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Comment (by ajdudman):

 Hello mf2k,

 My answer to comment:8 is yes, but it obscures which file is checksummed.

 My answer to comment:9 is all current patches should be removed, unless
 you know a way to set patch.pre_args on a per patch basis.  The patches
 sourced from git.archlinux.org require patch to use different patch prefix
 stripping level.  I.E., patch.pre_args to be -p1, while the current ones
 -p0, the default.
 Current patches patch-avilib-avidump.c.diff and patch-freetype-2.5.1.diff
 might remain.  I adjusted the prefixes to conform to -p1 patch prefix
 stripping, and renamed the altered patches, thinking I would avoid
 confusion.  I would be most happy for patches to follow standard naming
 convention, but three out of six of the patches are sourced from
 git.archlinux.org with different, non-standard names.

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Ticket URL: <https://trac.macports.org/ticket/56417#comment:10>
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