Question

我使用以下ViewController.m创建了一个新项目。当我运行应用程序时，我可以看到一个预期的原点/大小的框（38,100,250,163），但它是黑色的，没有视频播放。 Xcode中有一个奇怪的输出：

2012-08-23 15:36:45.559 VideoTest1[11398:c07] [MPAVController] Autoplay: Disabling autoplay for pause
2012-08-23 15:36:45.560 VideoTest1[11398:c07] [MPAVController] Autoplay: Disabling autoplay
2012-08-23 15:37:18.186 VideoTest1[11398:c07] [MPAVController] Autoplay: Skipping autoplay, disabled (for current item: 1, on player: 0)

请注意，视频是使用Videora iPhone Converter转换的，并且可以在Xcode中播放（所以这不是视频问题）;视频的路径是可以的，因为当我指定demo-iPhone1（不存在）时，我得到一个零例外。我试过在模拟器和iPhone上：总是黑盒子。有任何想法吗？

#import "ViewController.h"
#import <MediaPlayer/MediaPlayer.h>  

@interface ViewController ()

@end

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

    [moviePlayerController.view removeFromSuperview];
}


- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    NSString *filepath   =   [[NSBundle mainBundle] pathForResource:@"demo-iPhone" ofType:@"mp4"];
    NSURL    *fileURL    =   [NSURL fileURLWithPath:filepath];
    MPMoviePlayerController *moviePlayerController = [[MPMoviePlayerController alloc] initWithContentURL:fileURL];
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(moviePlaybackComplete:)
                                                 name:MPMoviePlayerPlaybackDidFinishNotification
                                               object:moviePlayerController];
    [moviePlayerController.view setFrame:CGRectMake(38,
                                                    100,
                                                    250,
                                                    163)];
    [self.view addSubview:moviePlayerController.view];
    [moviePlayerController play];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}

@end

Answer 1

我刚用这行代码解决了类似的问题。播放器控制器现在显示出来，视频播放完美：

@property (nonatomic, strong) MPMoviePlayerController *moviePlayer;
//
@synthesize moviePlayer = _moviePlayer;
//
[self.moviePlayer prepareToPlay];

修改以适应您的环境。

Answer 2

我通过添加playercontroller.moviePlayer.movieSourceType = MPMovieSourceTypeFile;

解决了类似的问题

Answer 3

你使用ARC吗？如果是这样，你必须保留MPMoviePlayerController！

将此添加到您的界面

@property (nonatomic, strong) MPMoviePlayerController *controller;

检查viewDidLoad的最后一行

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    NSString *filepath   =   [[NSBundle mainBundle] pathForResource:@"demo-iPhone" ofType:@"mp4"];
    NSURL    *fileURL    =   [NSURL fileURLWithPath:filepath];
    MPMoviePlayerController *moviePlayerController = [[MPMoviePlayerController alloc] initWithContentURL:fileURL];
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(moviePlaybackComplete:)
                                           name:MPMoviePlayerPlaybackDidFinishNotification
                                           object:moviePlayerController];
    [moviePlayerController.view setFrame:CGRectMake(38,
                                                100,
                                                250,
                                                163)];
    [self.view addSubview:moviePlayerController.view];
    [moviePlayerController play];
    [self setController:moviePlayerController];
}

Answer 4

同时查看视频格式。我的示例视频.m4v（我从Apple的网站上下载）中不断出现此错误。最后我用另一个.mp4的视频片段尝试了它并且它工作正常。许多错误仍然出现在我的控制台上。

2013-01-22 15:44:04.850 VideoTesting[4497:c07] [MPAVController] Autoplay: Likely to keep up or full buffer: 0
2013-01-22 15:44:04.851 VideoTesting[4497:c07] [MPAVController] Autoplay: Skipping autoplay, not enough buffered to keep up.
2013-01-22 15:44:04.853 VideoTesting[4497:c07] [MPAVController] Autoplay: Disabling autoplay for pause
2013-01-22 15:44:04.853 VideoTesting[4497:c07] [MPAVController] Autoplay: Disabling autoplay
2013-01-22 15:44:04.861 VideoTesting[4497:c07] [MPAVController] Autoplay: Enabling autoplay

然而，视频仍在播放。

无法使用MPMoviePlayerViewController播放视频

4 个答案: