[FFmpeg-trac] #8744(avdevice:new): Transparency problem when capturing a window with gdigrab

FFmpeg trac at avcodec.org
Wed Jun 17 22:53:21 EEST 2020


#8744: Transparency problem when capturing a window with gdigrab
-------------------------------------+-------------------------------------
             Reporter:  sacereda     |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:  avdevice     |                  Version:  4.2
             Keywords:  gdigrab      |               Blocked By:
  transparency                       |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:

 When capturing a windows explorer window with gdigrab, the effect is like
 a black layer layer with some transparency in front of the content and the
 result is not the same as the source.

 This problem doesn't occur when capturing Desktop (instead of title=XXX).

 How to reproduce:
 {{{
 % Open a windows explorer window (win+r Documents enter)
 % ffmpeg.exe -f gdigrab -i "title=Documents"
 ffmpeg version 4.2.3 (also occur in 4.0 version)
 built with gcc 9.3.1 (GCC) 20200523
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/8744>
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