[FFmpeg-trac] #2616(avcodec:open): support matrox mpeg-2 I-frame with alpha codec (m704 fourcc)

FFmpeg trac at avcodec.org
Mon May 2 12:21:16 CEST 2016


#2616: support matrox mpeg-2 I-frame with alpha codec (m704 fourcc)
-------------------------------------+-------------------------------------
             Reporter:  ami_stuff    |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  normal       |                Component:  avcodec
              Version:  git-master   |               Resolution:
             Keywords:  matrox       |               Blocked By:
  mpeg2video alpha                   |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by ami_stuff):

 It looks like Photoshop detects these colorful things with some kind of
 video filter.

 I exported video with and without alpha to utvideo.
 "utvideo_rgba_720_480.avi" decodes correctly in Photoshop (no colorful
 artefacts) and alpha works just fine.

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Ticket URL: <https://trac.ffmpeg.org/ticket/2616#comment:24>
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