Question

我有一个奇怪的问题。

MPMoviePlayerController 正在播放视频，音频只能通过耳机播放。

真正的阻力是这只发生在某些 iPad和iPhone上，甚至是同样的模型运行相同的系统！

我在这里创建了一个简单的失败示例：

http://www.porcaro.org/MPMoviePlayerController/TestMovie.zip

我已经看到它在iPhone 4S，iPhone 4和iPad 2上运行正常并失败。

这是最相关的代码。感谢您的任何见解，我也将向Apple提交一个错误：

(void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];


    moviePath = [NSString stringWithFormat:@"%@/intro.m4v", [[NSBundle mainBundle] bundlePath]];
    NSURL *movieURL = [NSURL fileURLWithPath:moviePath];
    theMoviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:movieURL];

    controlStyle = MPMovieControlStyleEmbedded;
    movieView = [self view];
    movieRect = [[self view] frame];
    controlStyle = MPMovieControlStyleFullscreen;

    theMoviePlayer.controlStyle = controlStyle;
    theMoviePlayer.view.userInteractionEnabled = YES;

    if (1) {
        NSLog(@"Created theMoviePlayer: %@.  Playing: %@", theMoviePlayer, moviePath);
    }

    [[NSNotificationCenter defaultCenter] removeObserver:self name:MPMoviePlayerPlaybackStateDidChangeNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self
                                          selector:@selector(checkForEndOfMovie:)
                                          name:MPMoviePlayerPlaybackStateDidChangeNotification
                                          object:theMoviePlayer];

    // this line doesn't fix the problem                                                                                                       
    //[theMoviePlayer prepareToPlay];                                                                                                          
    [[theMoviePlayer view] setFrame:movieRect];
    [movieView addSubview: [theMoviePlayer view]];
    [theMoviePlayer play];
}

Answer 1

这是一个古老的问题，但也许它会对某人有所帮助。我遇到了同样的问题，发现当手机只处于静音模式时就会发生这种情况。

解决方法是将播放器的useApplicationAudioSession属性设置为false。

[theMoviePlayer setUseApplicationAudioSession:NO];

Answer 2

使用mpMoviePlayer在iPad 2上播放视频后，我遇到了这个问题。视频播放效果非常好，但音频仅在连接耳机时播放。

解决问题的解决方案：

[theMoviePlayer setUseApplicationAudioSession:NO];

声音只能通过MPMoviePlayerController在某些设备上通过耳机播放

2 个答案: