I'm trying to figure out how to display a Web Browser inside my iOS VR app (Obj-c, SceneKit and raw OpenGL), and the part i'm not fully understanding is how to get the WKWebView to draw it's content into a Pixel Buffer of some sort, so I can use the speed of CVOpenGLESTextureCacheCreateTextureFromImage to convert the pixel data into a OpenGl Texture quickly/efficently and display it on a floating surface.I'm already doing something simular with the video portion of my app, but it has a AVPlayerItemVideoOutput, which produced the pixel buffer, but I can't figure out how to massage the CALayer into a Buffer so I can convert it into a texture to then draw in opengl.I know it has something to do with drawLayer:(Layer) ,(Context), but searching online hasn't been very fruitful.And i'm not using SceneKit like you would assume, the app was built before GVR for Scenekit was a thing, so every part of VR is handled manually (scenekit to textures, textures to opengl for Left/Right eye distortion mesh).

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.