I have an old iOS app that doesn't use GoogleVR, instead it rolls it's own VR framework, but once I upgraded to iOS 14 the data coming from CMMotionManager is very wobbly, or shaky, even if I place the phone flat on a table. Am I doing something wrong or do I need to use a different way to access the data? I've seen the Official Google VR team state they had to fix a similar issue, but I'm unable to find their changes, since it is buried inside compiled code for their Unity Plugin. The code in question is at: https://github.com/mgatelabs/SCN-VR/blob/master/scn-vr/CoreMotionTracker.m But the main parts would be as follows But i'm starting the process with: [self.motionManager startDeviceMotionUpdatesUsingReferenceFrame: CMAttitudeReferenceFrameXArbitraryZVertical]; And then i'm reading and transforming the data like this: CMQuaternion currentAttitude_noQ = self.motionManager.deviceMotion.attitude.quaternion; GLKQuaternion baseRotation = GLKQuaternionMake(currentAttitude_noQ.x, currentAttitude_noQ.y, currentAttitude_noQ.z, currentAttitude_noQ.w); GLKQuaternion rotationFix = GLKQuaternionMakeWithAngleAndAxis(-M_PI_2, 0, 0, 1); if (self.landscape) {     self.orientation = GLKQuaternionMultiply(baseRotation, rotationFix);   } else {     self.orientation = GLKQuaternionMultiply(rotationFix, baseRotation);   } And it is all wobbly, which isn't that great for VR.

So I have an app that has been around for years now and recently with the iOS 15 update it's support to play videos hosted on Dropbox has stopped working. What I do is query dropbox for the temporary link. Then I create a AVPlayerItem and give it to the player which is inside of a OpenGL view, since it is a VR player. Then it should just work, but right now i'm getting the error Error Domain=AVFoundationErrorDomain Code=-11828 \"Cannot Open\" UserInfo={NSLocalizedFailureReason=This media format is not supported., NSLocalizedDescription=Cannot Open, NSUnderlyingError=0x280597990 {Error Domain=NSOSStatusErrorDomain Code=-12847 Now i've tried to troubleshoot this, but I can Download the file from inside the app (not with the player) and play the file locally. Place the same file on a UPNP server and it plays (Does not transcode) If I run the app on Mac OS as an Ipad app, it works. But I suspect something with running on a mac makes it play different. So i'm kind of lost, it feels like iOS 15 is acting strange on the iPhone, but on the Mav it's fine.