I've been playing with AVAssetResourceLoaderDelegate recently. I have a manager class that vends AVPlayerItem's, and then intercepts the requests for blocks of the video data, and serves them from cached data, or downloads them using NSURLConnection, and passes them back to the player, and saves them to the filesystem. All of this works really nicely. However, I have run into one issue that I don't quite understand. Let's say there's a 20MB mp4 file, of which I have 18MB cached on the filesystem. When I get the AVAssetResourceLoaderDelegate callback, I reply with the first 18MB of data. I then get a callback requesting the last 2MB, and open an NSURLConnection. I have an observer on the AVPlayer, that tells me when its ready to play. In this scenario, even though I've handed back 18MB of data, the AVPlayer is never ready to play until just after my new NSURLConnection sends the didReceiveResponse callback. If I degrade my network with Network Link Conditioner, to say Edge, the time to receive the didReceiveResponse callback increases, and the AVPlayer's change to ready to play tracks it almost exactly. As far as threading goes, I have the AVPlayerItem's configured to use the main queue, and the NSURLConnection's configured to the the main queue's operation queue. This actually works really well in practice - all of the callbacks to the AVAssetResourceLoaderDelegate and NSURLConnection's are processed very very quickly, and the main thread is not blocked in any way, especially between the connection start and the didReceiveResponse callback. I played around with giving the AVPlayerItem's and NSURLConnection's their own queues, but this didn't seem to make any difference. For some reason, the connection seems to block the player from playing, even though its been handed a massive block of the initial data. Can anyone give me a clue as to what might be going on here? cheers, m. -- http://www.mildmanneredindustries.com/ _______________________________________________ Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (Macnetworkprog@lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/macnetworkprog/site_archiver%40lists... This email sent to site_archiver@lists.apple.com