On an iPad Pro 11-inch (M4) running iPadOS 27.0 (24A437), ScreenCaptureKit delivers a maximum of 60 frames per second when capturing the entire screen, even while an app is rendering at 120 fps (confirmed with the Metal Performance HUD).
What I tested:
- Default configuration: exactly 60 fps, with every frame timestamp spaced 16.67ms apart.
- Setting minimumFrameInterval to 1/120 and queueDepth to 8, both before starting the stream and through updateConfiguration after it started: the values are accepted and read back correctly, but delivery stays at exactly 60 fps.
- Smaller output sizes (1/4 and 1/8 of native resolution): still 60 fps.
- ReplayKit broadcast upload extension: also exactly 60 fps.
Also, minimumFrameInterval and queueDepth are documented as available on iOS/iPadOS 27, but the iOS 27 SDK marks them as unavailable.
Request: please allow ScreenCaptureKit to capture at the display's full refresh rate (up to 120 fps) on ProMotion devices when minimumFrameInterval asks for it, and make minimumFrameInterval available in the iOS SDK.
Please file an enhancement request using the Feedback Assistant so that your request can be seen by the appropriate decision makers. If you file the request, please post the Feedback number here so we can make sure it gets routed to the right team.
Please note that filing an enhancement request does not guarantee Apple will add any requested functionality to Apple products in the future. However, with that said, filing an enhancement request is a good way to get your ideas in front of the folks who make decisions about that sort of thing.
One note for your report: minimumFrameInterval and queueDepth are documented, and declared in the iOS 27 SDK, as macOS and Mac Catalyst only. So the request is to bring them, or an equivalent frame-rate control, to iPadOS.
If you're not familiar with how to file enhancement requests, take a look at Bug Reporting: How and Why?
