MPMoviePlayerController 给了我一个黑色的空视图，没有视频播放

Question

iOS 5.1，代码如下：

 MPMoviePlayerController *player =
    [[MPMoviePlayerController alloc] initWithContentURL: [NSURL URLWithString:@"map.mp4"]];
    [player prepareToPlay];
    [player.view setFrame: self.view.bounds];  // player's frame must match parent's
    [self.view addSubview: player.view];
    // ...
    [player play];

其实这和苹果参考说的一样，但是当我点击按钮使用这个功能时，只有一个黑色的矩形停留在那里，没有视频播放，没有声音发生，也没有粉碎，所以我想知道如何完成这项工作

Answer 1

很抱歉回复太晚了。解决方案有点奇怪。但它帮助我在面对同样的问题时继续前进。

MPMovieSourceTypeStreaming 是你错过的东西。

MPMoviePlayerController *player =
[[MPMoviePlayerController alloc] initWithContentURL: [NSURL URLWithString:@"map.mp4"]];
[player prepareToPlay];
[player.view setFrame: self.view.bounds];  // player's frame must match parent's
player.movieSourceType    = MPMovieSourceTypeStreaming;
[self.view addSubview: player.view];
// ...
[player play];

Answer 2

您可能正在发送您的

[player play] 

消息太早了。

使用以下通知观察

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(playMovie:) name:MPMoviePlayerLoadStateDidChangeNotification object:player];

监听 loadState 变为可播放。要检查该更新，请执行以下操作：

- (void)playMovie:(NSNotification *)notification {
    MPMoviePlayerController *player = notification.object;
    if (player.loadState & MPMovieLoadStatePlayable)
    {
        NSLog(@"Movie is Ready to Play");
        [player play];
    }
}

电影准备好后应该开始播放。

Answer 3

试试下面的代码来播放你项目资源中的视频：

  NSBundle *bundle = [NSBundle mainBundle];
  NSString *moviePath = [bundle pathForResource:@"map" ofType:@"mp4"];
  NSURL *movieURL = [[NSURL fileURLWithPath:moviePath] retain];

  MPMoviePlayerController *player =
  [[MPMoviePlayerController alloc] initWithContentURL:movieURL];
  [player prepareToPlay];
  [player.view setFrame: self.view.bounds];  // player's frame must match parent's
  [self.view addSubview: player.view];
    // ...
  [player play];

谢谢..！

Answer 4

基于@Dinesh 的回答，您的 URL 创建不正确。的价值

[NSURL URLWithString:@"map.mp4"]

将为零，因为 @"map.mp4" 不是有效的 URL。要从应用程序包中创建一个有效的 url，请按照 Dinesh 的说明进行操作。要创建远程 URL，您可以执行以下操作

[NSURL URLWithString:@"http://www.jplayer.org/video/m4v/Big_Buck_Bunny_Trailer.m4v"]

URL 应该包含它的所有部分：协议、主机、路径、文件。

干杯，费利佩

Answer 5

在主窗口上添加您的电影播放器​​控制器视图，例如：

 MPMoviePlayerController *player =
    [[MPMoviePlayerController alloc] initWithContentURL: [NSURL URLWithString:@"map.mp4"]];
    [player prepareToPlay];
    [player.view setFrame: self.view.bounds];

AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
[appDelegate.window addSubview: player.view];

[player play];

希望它会起作用！

Answer 6

你的播放器应该是你的视图控制器的一个属性，像这样：

.h:

@property(nonatomic,weak)MPMoviePlayerController *moviePlayer;

.m:

    MPMoviePlayerController *player =
    [[MPMoviePlayerController alloc] initWithContentURL: [NSURL URLWithString:@"map.mp4"]];
    [player prepareToPlay];
    [player.view setFrame: self.view.bounds];  // player's frame must match parent's
    //set the player to your property
    self.moviePlayer=player;

    [self.view addSubview: self.moviePlayer.view];
    // ...
    [self.moviePlayer play];

Answer 7

请使用 MPMoviePlayerViewController 因为 MP4 文件。当您使用 MOV 时，工作完美！

MPMoviePlayerViewController *moviePlayerViewController;

-(void)PlayVideoController:(NSString*)videoUrl1 { 
    NSURL *fileURL = [NSURL URLWithString:videoUrl1]; 
    moviePlayerViewController = [[MPMoviePlayerViewController alloc] initWithContentURL:fileURL];

    // Register for the playback finished notification.
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(myMovieFinishedCallback:) name:MPMoviePlayerPlaybackDidFinishNotification object:moviePlayerViewController.moviePlayer];

    //Present
    [self presentMoviePlayerViewControllerAnimated:moviePlayerViewController];

    // Play the movie!
    moviePlayerViewController.moviePlayer.movieSourceType = MPMovieSourceTypeFile;
    [moviePlayerViewController.moviePlayer play];
}

-(void)myMovieFinishedCallback:(NSNotification*)aNotification {
    [[NSNotificationCenter defaultCenter] removeObserver:self name:MPMoviePlayerPlaybackDidFinishNotification object:moviePlayerViewController.moviePlayer];
    [moviePlayerViewController release], moviePlayerViewController = nil;
}

Answer 8

您可能需要交叉检查视频网址是否有空格。以下代码对我有用。

- (IBAction)btnPlayVideo:(id)sender {

    self.strVideoUrl = [self.strVideoUrl stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
    NSURL    *fileURL    =   [NSURL URLWithString:[NSString stringWithFormat:@"%@", self.strVideoUrl]];
    NSLog(@"Url to play = %@", self.strVideoUrl);

        self.moviePlayerController = [[MPMoviePlayerController alloc] initWithContentURL:fileURL];

        [[NSNotificationCenter defaultCenter] addObserver:self
                                                 selector:@selector(moviePlaybackComplete:)
                                                     name:MPMoviePlayerPlaybackDidFinishNotification
                                                   object:self.moviePlayerController];
        [self.moviePlayerController.view setFrame:self.view.bounds];
        [self.view addSubview:self.moviePlayerController.view];
        self.moviePlayerController.shouldAutoplay = YES;
        self.moviePlayerController.fullscreen = YES;
        self.moviePlayerController.controlStyle=NO;
        [self.moviePlayerController prepareToPlay];
        self.moviePlayerController.movieSourceType = MPMovieSourceTypeStreaming;

        [self.moviePlayerController play];

}

- (void)moviePlaybackComplete:(NSNotification *)notification
{
    self.moviePlayerController = [notification object];
    [[NSNotificationCenter defaultCenter] removeObserver:self
                                                    name:MPMoviePlayerPlaybackDidFinishNotification
                                                  object:self.moviePlayerController];

    [self.moviePlayerController.view removeFromSuperview];
    self.closeVideAdProp.hidden = NO;
    btnCloseAd.hidden=FALSE;
}