[FFmpeg-trac] #4814(undetermined:new): swscale default alpha blending drops alpha

[FFmpeg]

#4814: swscale default alpha blending drops alpha
-------------------------------------+-------------------------------------
               Reporter:  michael    |                  Owner:
                   Type:  defect     |                 Status:  new
               Priority:  normal     |              Component:
                Version:             |  undetermined
  unspecified                        |               Keywords:  swscale,
             Blocked By:             |  alpha
Reproduced by developer:  0          |               Blocking:
                                     |  Analyzed by developer:  0
-------------------------------------+-------------------------------------
 It was suggested by several developers to change the default to
 uniform_color (black). This would be slower but produce a more expected
 output for the sample from Ticket4746. It would produce a less expected
 output for laraShadow_dl.flv

 I have no oppinon on which default is better. But having a seperate ticket
 for the default could avoid the dispute over #4746

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Ticket URL: <https://trac.ffmpeg.org/ticket/4814>
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