无法使用MPMoviePlayerViewController播放视频 [英] Cannot play video with MPMoviePlayerViewController

问题描述

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（38,100,250,163）的盒子，但它是黑色的，没有视频播放。 Xcode中有一个奇怪的输出：

I created a fresh project with the following ViewController.m. When I run the app I can see a box of the expected origin/size (38, 100, 250, 163) but it is black and no video playing. There is a strange output in Xcode:

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？

Note that the video is converted with Videora iPhone Converter and plays ok in Xcode (so it is not a video problem); the path to the video is ok because when I specify demo-iPhone1 (which does not exist) I get a nil exception. I tried in Simulator and on iPhone: always black box. Any ideas?

#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

推荐答案

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并且视频播放完美：

I just solved a similar problem with this line of code. The player controllers now shows up and the video plays perfectly:

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

修改以适合您的环境。

这篇关于无法使用MPMoviePlayerViewController播放视频的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！