I test with ScreenCaptureKit example and success to get desktop image as IOSurface. I know IOSurface holds GPU memory and not easy to access as DRAM. Do you know a way to h.264 compress the IOSurface? Or do I have to convert to CVPixelBuffer from IOSurface? If you have any sample code for handling IOSurface, it would be useful to me.

If I set queueDepth to a value that smaller than 6 ( 5 for example ), the stream will be paused when I start capturing and make it minimized or hidden. Is that a correct behavior or a bug?? Filed a report: FB11441320

We can use the sample code to generate the SCK capture tool, Run safari with youtube video. Run the SCK capture tool Select Application capture with the above Safari youtube video, the video shall be playing well. Toggle the youtube video to full screen, you will not able to see the YouTube video.