MPMoviePlayerController口吃

   NSString *path = [[NSBundle mainBundle] pathForResource:@"sample" ofType:@"m4v"];

   MPMoviePlayerController *video = [[MPMoviePlayerController alloc] initWithContentURL:[NSURL fileURLWithPath:path]]; 

   [video setBackgroundColor:[UIColor blackColor]];
   video.scalingMode = MPMovieScalingModeAspectFill; 

   [[ NSNotificationCenter defaultCenter ] addObserver: self selector: @selector(movieFinishedCallback:) name: MPMoviePlayerPlaybackDidFinishNotification object: aVideo ];

   [video play];

....movieFinishedCallback...

   [video release];

结果:

电影从第10帧开始,然后重置为第0帧,产生结巴效果。。。