Feature request: WindowsGraphicsCapture API

[MB SOFT]

This is a feature request.

Could you please modify Gdigrab to use WindowsGraphicsCapture API?

​https://blogs.windows.com/windowsdeveloper/2019/09/16/new-ways-to-do-screen-capture/

Advantages:
1) capture any window (including hardware accelerated window)
2) capture any graphics in the window (including transparent childs)
3) capture window outside the visible area
4) minimal cpu load even with high res and rates

Ex: here [​​https://github.com/mmozeiko/wcap] there are free sources of the tool wcap that use windows graphics capture api. compared to gdigrab it has 3 times less cpu load.
Could someone use that code and adapt gdigrab?

[​​https://github.com/mmozeiko/wcap/blob/main/wcap_capture.c]

[Balling]

NVFBC is better, much better. And is available on geforce too with a simple hack. P.S. it works by this day in Steam captire and shadowplay, last one records in hevc now.

[markg85]

For the windows side of things, a change here might be required.
Nvidia themselves have deprecated NVFBC on windows specifically (see this pdf: ​https://developer.download.nvidia.com/designworks/capture-sdk/docs/NVFBC_Win10_Deprecation_Tech_Bulletin.pdf)

The support remains as-is on other platforms.

[Balling]

Nvidia themselves have deprecated NVFBC on windows specifically

After it was hacked. It is still used in Steam and Geforce Capture. Looking glass has a patch that uses magic string from Gefore Capture.

[MB SOFT]

OBS Studio and VMIX they both offers WindowsGraphicsCapture API mode and works very well.
It's missing in ffmpeg

[MB SOFT]

here ​https://github.com/mmozeiko/wcap there are free sources of the tool wcap that use windows graphics capture api. compared to gdigrab it has 3 times less cpu load and allows the capture of windows outside the screen area or with transparent childs or with d3d11 surfaces.
Could someone use that code and create an input module for ffmpeg to use instead of the old and heavy gdigrab?

​https://github.com/mmozeiko/wcap/blob/main/wcap_capture.c

[Balling]

See also ​https://github.com/FFmpeg/FFmpeg/commit/f611255480b7cb61af745131251a1fd72f4dd086

[MB SOFT]

gstreamer 1.22 now has windows graphics capture api

"d3d11screencapture: Add Windows Graphics Capture API based capture mode, including Win32 application window capturing"

with that i can now capture a single application form

even the upcoming ddgrab cannot do that

i have now switched to gstreamer but hope to see windows graphics capture added soon also on ffmpeg and come back.