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copied!<p>After speaking to an Apple technician it turns out that it's not possible to control or mute the audio using <code>MPMoviePlayerController</code>.</p> <p>Instead you have to create your own controller using AVFoundations <code>AVPlayer</code> class.</p> <p>Once you're using that it's a matter of creating a custom audio mix and setting the volume level. It actually works very well.</p> <p>Sample code:</p> <pre><code> AVURLAsset * asset = [AVURLAsset URLAssetWithURL:[self localMovieURL] options:nil]; NSArray *audioTracks = [asset tracksWithMediaType:AVMediaTypeAudio]; // Mute all the audio tracks NSMutableArray * allAudioParams = [NSMutableArray array]; for (AVAssetTrack *track in audioTracks) { AVMutableAudioMixInputParameters *audioInputParams =[AVMutableAudioMixInputParameters audioMixInputParameters]; [audioInputParams setVolume:0.0 atTime:kCMTimeZero ]; [audioInputParams setTrackID:[track trackID]]; [allAudioParams addObject:audioInputParams]; } AVMutableAudioMix * audioZeroMix = [AVMutableAudioMix audioMix]; [audioZeroMix setInputParameters:allAudioParams]; // Create a player item AVPlayerItem *playerItem = [AVPlayerItem playerItemWithAsset:asset]; [playerItem setAudioMix:audioZeroMix]; // Mute the player item // Create a new Player, and set the player to use the player item // with the muted audio mix AVPlayer *player = [AVPlayer playerWithPlayerItem:playerItem]; self.mPlayer = player; [mPlayer play]; </code></pre> <p>I've written an <code>MPMoviePlayerController</code> replacement class that adds support for volume level. I will upload the to github shortly and add the link in this post.</p>

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