Maintaining good scroll performance when using AVPlayer

Question

I\'m working on an application where there is a collection view, and cells of the collection view can contain video. Right now I\'m displaying the video using AVPlayer

Answer 1

If you look into Facebook's AsyncDisplayKit (the engine behind Facebook and Instagram feeds), you can render video for the most part on background threads using their AVideoNode. If you subnode that into an ASDisplayNode and add the displayNode.view to whatever view you are scrolling (table/collection/scroll), you can achieve perfectly smooth scrolling (just make sure they create the node and assets and all that on a background thread). The only issue is when having the change the video item, as this forces itself onto the main thread. If you only have a few videos on that particular view you are fine to use this method!

        dispatch_async(dispatch_get_global_queue(QOS_CLASS_BACKGROUND, 0), {
            self.mainNode = ASDisplayNode()
            self.videoNode = ASVideoNode()
            self.videoNode!.asset = AVAsset(URL: self.videoUrl!)
            self.videoNode!.frame = CGRectMake(0.0, 0.0, self.bounds.width, self.bounds.height)
            self.videoNode!.gravity = AVLayerVideoGravityResizeAspectFill
            self.videoNode!.shouldAutoplay = true
            self.videoNode!.shouldAutorepeat = true
            self.videoNode!.muted = true
            self.videoNode!.playButton.hidden = true
            
            dispatch_async(dispatch_get_main_queue(), {
                self.mainNode!.addSubnode(self.videoNode!)
                self.addSubview(self.mainNode!.view)
            })
        })