Question

我想播放从iPad应用程序上传到服务器的视频，但是当屏幕加载时会出现错误：

AVPlayerItem不能与多个AVPlayer实例关联

我使用以下代码：

    -(void)playVideo{




     NSURL *url = [NSURL URLWithString:@"http://celeritas.com.pk/emrapp/test.mp4"];

MPMoviePlayerViewController *mp = [[MPMoviePlayerViewController alloc] initWithContentURL:url];

    [[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(moviePlaybackDidFinish:)
                                             name:MPMoviePlayerPlaybackDidFinishNotification
                                           object:mp];    

mp.moviePlayer.movieSourceType = MPMovieSourceTypeStreaming;

[self presentMoviePlayerViewControllerAnimated:mp];
[mp release];


NSLog(@"Successfully playing thanks");
     }


   -(void)playbackFinishedCallback:(NSNotification *)notification{

MPMoviePlayerController *movie = [notification object];
[[NSNotificationCenter defaultCenter] removeObserver:self
                                                name:MPMoviePlayerPlaybackDidFinishNotification
                                              object:movie];
[movie release];

    }

Answer 1

http://celeritas.com.pk/emrapp/test.mp4网址似乎有误......

在此服务器上找不到请求的网址/emrapp/test.mp4。

任何方式都可行

·H

 MPMoviePlayerViewController * plyr;
 NSURL * url;


@property (nonatomic,retain) MPMoviePlayerViewController *plyr;
@property (nonatomic,retain) NSURL *url;

的.m

@synthesize plyr ;
@synthesize url;

     url = [NSURL URLWithString:@"valid url"];          
    plyr = [[MPMoviePlayerViewController alloc] initWithContentURL:url];

Answer 2

Url可能是错误的双重检查视频网址链接是否可访问，其次看到您的网络防火墙这可能也会导致问题。

您可以更改一次调整，而不是：

mp.moviePlayer.movieSourceType = MPMovieSourceTypeStreaming;

使用：

mp.moviePlayer.movieSourceType = MPMovieSourceTypeUnknown;

Answer 3

试试这个

在.h中创建MPMoviePlayerViewController的对象，如 MPMoviePlayerViewController * mp;

#import<MediaPlayer/MediaPlayer.h>
mp = [[MPMoviePlayerViewController alloc] initWithContentURL:[NSURL URLWithString:url]];

[[mp moviePlayer] prepareToPlay];
[[mp moviePlayer] setUseApplicationAudioSession:NO];
[[mp moviePlayer] setShouldAutoplay:YES];
[[mp moviePlayer] setControlStyle:2];
[[mp moviePlayer] setRepeatMode:MPMovieRepeatModeOne];
[self presentMoviePlayerViewControllerAnimated:mp];

Answer 4

试试此代码

    -(IBAction)playMovie:(id)sender  
    {  

      NSURL  *fileURL =  [NSURL URLWithString:@"http://www.youtube.com/watch?v=3Qjh56woQMw"];  

     MPMoviePlayerController *moviePlayerController = [[MPMoviePlayerController alloc]         initWithContentURL:fileURL];  

    [[NSNotificationCenter defaultCenter] addObserver:self  
                        selector:@selector(moviePlaybackComplete:)  
                                        name:MPMoviePlayerPlaybackDidFinishNotification  
                                       object:moviePlayerController];  

[self.view addSubview:moviePlayerController.view];  
moviePlayerController.fullscreen = YES;  
[moviePlayerController play];  
  } 

    - (void)moviePlaybackComplete:(NSNotification *)notification  
    {  
    MPMoviePlayerController *moviePlayerController = [notification object];  
   [[NSNotificationCenter defaultCenter] removeObserver:self name:MPMoviePlayerPlaybackDidFinishNotificationobject:moviePlayerController];
    [moviePlayerController.view removeFromSuperview];  
    [moviePlayerController release];  
}

从服务器播放iPad应用程序中的视频

4 个答案: