[FFmpeg-trac] #290(undetermined:closed): alpha channel not preserved when transcoding

FFmpeg trac at avcodec.org
Sat Nov 5 13:19:00 CET 2011

#290: alpha channel not preserved when transcoding
             Reporter:               |                    Owner:  michael
  matteosistisette                   |                   Status:  closed
                 Type:  defect       |                Component:
             Priority:  normal       |  undetermined
              Version:  unspecified  |               Resolution:
             Keywords:               |  worksforme
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
Changes (by cehoyos):

 * status:  new => closed
 * resolution:   => worksforme


 Both -vcodec qtrle -pix_fmt argb and -vcodec png -pix_fmt rgb32 encode the
 alpha channel of your sample as expected.

 Does libx264 support encoding an alpha channel?

Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/290#comment:2>
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