MPMoviePlayerController and MPMediaPlayback.currentPlaybackRate

Question

I'm trying to change the currentPlaybackRate of MPMoviePlayerController to slow down a video.This is my source code:moviePlayer =  [[MPMoviePlayerController alloc] initWithContentURL:url];[moviePlayer setCurrentPlaybackRate:0.5];moviePlayer.currentPlaybackRate = 0.5;I really don't understand. Where is my error (because there is no error in my console) ?This is the Apple Documentations:MPMoviePlayerController (class): https://developer.apple.com/library/ios/documentation/MediaPlayer/Reference/MPMoviePlayerController_Class/MPMediaPlayback (protocol): https://developer.apple.com/library/prerelease/ios/documentation/MediaPlayer/Reference/MPMediaPlayback_protocol/index.html#//apple_ref/occ/intfp/MPMediaPlayback/currentPlaybackRateCan you help me ?

saxman58 · Answer

We set moviePlayer.currentPlaybackRate all the time and it works well, but I believe you have to start the playback first and then set the speed.  You might find that stopping and starting resets the rate to 1.0, so you&#x27;d have to set it to your desired value again each time playback starts.  Check out what it is at different parts of your program with:NSLog(@"Rate &#x3D; %f", moviePlayer.currentPlaybackRate);And you can set up a notification to tell you when it starts playing, with something like:    [[NSNotificationCenter defaultCenter] addObserver:self                                             selector:@selector(playbackStateChanged:)                                                 name:MPMoviePlayerPlaybackStateDidChangeNotification                                               object:nil];