MPMoviePlayerController and MPMediaPlayback.currentPlaybackRate

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/currentPlaybackRate


Can you help me ?

MPMoviePlayerController and MPMediaPlayback.currentPlaybackRate
 
 
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