[FFmpeg-trac] #9271(avdevice:open): Get color information from source device

FFmpeg trac at avcodec.org
Tue Jun 1 21:46:36 EEST 2021


#9271: Get color information from source device
-------------------------------------+-------------------------------------
             Reporter:  Diederick    |                    Owner:  (none)
  Niehorster                         |
                 Type:  enhancement  |                   Status:  open
             Priority:  normal       |                Component:  avdevice
              Version:  git-master   |               Resolution:
             Keywords:  dshow        |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by Diederick Niehorster):

 Ok, in dshow_color_primaries i now check if MFVideoTransFunc_2020_const is
 applied, and symmetrically, in dshow_color_trc i now check if
 MFVideoTransferMatrix_BT2020_10 or MFVideoTransferMatrix_BT2020_12 is
 applied. Also fixed the DV PAL chroma location. I have updated the
 attached patch. Does this look all correct to you then: ready to go? The
 final patch will be more involved, as i ran into devices that expose the
 same formats twice, just once with the extended info attached and once
 not. So format selection logic needs to change to make sure the one with
 extended info gets selected if available. I'll just send that along with
 this to the devel list directly.

 Great the Microsoft docs got fixed so quick, good you did that!
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/9271#comment:9>
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