On Jan 15, 2017, at 09:22 , davel...@mac.com wrote: > > I have an iOS presentation app > (https://itunes.apple.com/app/redraw/id1114820588?mt=8 > <https://itunes.apple.com/app/redraw/id1114820588?mt=8>) that I currently > make videos from by AirPlaying it to my Mac and using Screenflow on the Mac > to show the iPad screen and record my audio from a microphone (and then > edit). I'd like to build this functionality into my app directly
AVFoundation doesn’t seem to have the ability of capturing screen video on iOS — AVCaptureScreenInput is documented as Mac only. That would rule out AVFoundation for the basic video capture within your app. You might be able to capture a series of screen shots, but it has to be done in real time, and that’s going to be tricky to get right on iOS where you’ll need to buffer the captured images to storage that might not be fast enough. If you mean you want to write a companion Mac app, then I guess you can use AVCaptureScreenInput to capture the raw video, and then you could use AVAssetWriter to export your final, composed video. However, AVAssetWriter is *not* a real-time function, so you couldn’t rely on it keeping up if you tried to export as the user interleaves the still images with the raw video. What you’d need to do is add a playback/edit phase, where you played the raw video, captured the timing of the user edits (letting the playback skip frames if the edits held up the playback), then export the “composition” when the user is done. (Or, you could export in the background *during* editing, which would mean it would be done soon after the user finishes, but this may have adverse effects on playback on a lower-end Mac.) AVCaptureScreenInput does let you choose the screen, though. FWIW, since I’m not sure I properly understood exactly what solution you’re looking for. _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
