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

[FFmpeg]

#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):

 hmm just checked this again and "m704.avi" file seems to decode correctly
 with reference software (after remuxing to *.m2v)

 ffmpeg -vcodec mpeg2video -i 704.avi -vcodec copy 704.m2v

 http://www.mpeg.org/MPEG/video/mssg-free-mpeg-software.html

 https://web.archive.org/web/20061214212714/http://www.mpeg2.de/video/software/mpg2w11b.zip

 (I tested with "mpeg2dec.exe" from "mpg2w11b.zip" archive)

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Ticket URL: <https://trac.ffmpeg.org/ticket/2616#comment:22>
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