#8744: Transparency problem when capturing a window with gdigrab
-------------------------------------+-------------------------------------
Reporter: sacereda | Owner:
Type: defect | Status: new
Priority: normal | Component: avdevice
Version: git-master | Resolution:
Keywords: gdigrab | Blocked By:
alpha |
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Comment (by sacereda):
Hi,
If I open the attached copy-rawvideo.bmp file with xnview or similar, most
of pixels have alpha component to zero. Format is detected as BGRA, but
some parts of the window are "covered" (alpha 0) and doesn't reproduce the
original content (check gdigrab-transparency.jpg)
You can reproduce it both with ffplay and ffmpeg:
% ffplay -f gdigrab -i "title=Documents"
% ffmpeg -f gdigrab -i "title=Documents" -vframes 1 output.png
In our software (using ffmpeg 4.0), we handle alpha channel and the
behaviour is the same as in ffplay.
Let me know if you need further info, or if I can help in any way.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/8744#comment:7>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
_______________________________________________
FFmpeg-trac mailing list
[email protected]
https://ffmpeg.org/mailman/listinfo/ffmpeg-trac
To unsubscribe, visit link above, or email
[email protected] with subject "unsubscribe".
