[MacPorts] #18256: ffmpeg: set default variants to include all optional codecs

[MacPorts]

#18256: ffmpeg: set default variants to include all optional codecs
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 Reporter:  devans@…                                |       Owner:  acho@…           
     Type:  enhancement                             |      Status:  new              
 Priority:  Normal                                  |   Milestone:  Port Enhancements
Component:  ports                                   |     Version:  1.7.0            
 Keywords:  vorbis faac faad lame theora x264 xvid  |        Port:  ffmpeg           
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Comment(by jmr@…):

 There's no point having variants if you're going to make them all default.
 If you deselect them at install time, they come back on upgrade: #2377

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Ticket URL: <http://trac.macports.org/ticket/18256#comment:3>
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