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我正在使用MPMoviePlayer在我的应用程序中播放短视频,而在SDK 3.1.3中没有任何问题。我对SDK 4中的代码进行了更改,但视频未播放。我只是得到一个黑色的屏幕和音频。 Apple开发人员中心没有针对最新SDK的此类示例代码。以下是我正在使用的代码:在iPhone SDK 4.0中使用MPMovieController的问题
- (void)viewDidLoad {
[super viewDidLoad];
//videoPlayer is a MPMoviePlayerController object defined in the header file of the view controller
if (videoPlayer == nil){
NSString * videoPath = [[NSBundle mainBundle] pathForResource:@"myvideo" ofType:@"mp4"];
if (videoPath == NULL){
return;
}
NSURL * videoURL = [NSURL fileURLWithPath:videoPath];
videoPlayer = [[MPMoviePlayerController alloc] initWithContentURL:videoURL];
videoPlayer.controlStyle = MPMovieControlStyleNone;
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(playbackFinished:) name:@"MPMoviePlayerPlaybackDidFinishNotification" object:movieController.moviePlayer];
[videoPlayer play];
[videoPlayer setFullscreen:YES];
[self.view addSubview:videoPlayer.view];
}
}
以上结果只是音频正在播放黑屏。播放结束时通知被正确调用。
当以上没有工作,然后我使用新的MPMoviePlayerViewController类,如下所示甚至尝试:
- (void)viewDidLoad {
[super viewDidLoad];
NSString * videoPath = [[NSBundle mainBundle] pathForResource:@"myvideo" ofType:@"mp4"];
if (videoPath == NULL){
return;
}
NSURL * videoURL = [NSURL fileURLWithPath:videoPath];
//movieController is an MPMoviePlayerViewController object defined in the header file of view controller
movieController = [[MPMoviePlayerViewController alloc] initWithContentURL:videoURL];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(playbackFinished:) name:@"MPMoviePlayerPlaybackDidFinishNotification" object:movieController.moviePlayer];
[movieController.moviePlayer setFullscreen:YES];
[movieController.moviePlayer play];
[self presentMoviePlayerViewControllerAnimated:movieController];
}
同样的问题仍然存在 - 我可以听到声音,并在播放结束的通知,被称为如预期。不过,我只是看到一个黑屏而不是视频。
视频编码没有任何问题,因为相同的视频在iTunes以及我的iPod Touch中在常规视频播放列表中正常播放。
任何人都可以帮我解决这个问题吗?
在此先感谢