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mpmovieplayercontroller - An AVPlayerItem can occupy only one position in a player's queue at a time

Im getting this error when trying to play a video from my temp directory:

NSString *tmpDir = [NSTemporaryDirectory() stringByAppendingString:@"/"];
NSString *url = [tmpDir stringByAppendingString:videoToPlay];

MPMoviePlayerController *player =
[[MPMoviePlayerController alloc]
 initWithContentURL:[NSURL fileURLWithPath:url]];

Why am i getting this error "An AVPlayerItem can occupy only one position in a player's queue at a time."

Isnt that code correct? Am i missing something simple?

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I tried various solutions provided in apple dev forums. In my case what worked was just changing the source type from streaming to unknown:

// player.movieSourceType = MPMovieSourceTypeStreaming;

  player.movieSourceType = MPMovieSourceTypeUnknown;

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