[FFmpeg-trac] #5272(avcodec:open): videotoolbox fails to initialize for mpeg2, mpeg4 codec

FFmpeg trac at avcodec.org
Fri Mar 18 11:23:21 CET 2016


#5272: videotoolbox fails to initialize for mpeg2, mpeg4 codec
-------------------------------------+-------------------------------------
             Reporter:  lucaswang    |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  important    |                Component:  avcodec
              Version:  git-master   |               Resolution:
             Keywords:               |               Blocked By:
  videotoolbox regression            |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by ponpon):

 i don't understand the below. please tell me.

 question1
 though videotoolbox_mpeg1, videotoolbox_mpeg2, videotoolbox_mpeg4,
 videotoolbox_h263 are displayed in the section of hwaccel when configuring
 ffmpeg, does videotoolbox hardware decoding support for mpeg1,  mpeg2,
 mpeg4, h263.at all?

 as long as reading
 https://software.intel.com/en-us/articles/2nd-gen-hd-graphics-quick-
 reference-guide/
 https://software.intel.com/en-us/articles/3rd-gen-hd-graphics-quick-
 reference-guide
 https://software.intel.com/en-us/articles/quick-reference-guide-to-intel-
 processor-graphics/
 mpeg1, mpeg4, h263 aren't suppoted.

 question2
 is the auto switch introduced into the initial implement of videotoolbox
 on ffmpeg for the further extensions?

 question3
 what is the advantage of commit ID:
 78cc19f15ead41909ddaf85cd5bad10036a93883 discarding the possibility of the
 further extensions?
 as mentioned above, i don't think those who want or need to use the
 decoder of ffmpeg use -hwaccel videotoolbox.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/5272#comment:9>
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