MPMoviePlayerController and HTTP Live Streaming

问题:

every one. I'm trying to figure out how to play live stream using MPMoviePlayerController. For testing i'm using Apples test stream sample http://devimages.apple.com/iphone/samples/bipbopall.html. It's perfectly working in UIWebView, but i can't make it work with MPMoviePlayerController. There is my piece of code:

NSURL *mediaURL = [NSURL URLWithString:@"http://devimages.apple.com/iphone/samples/bipbopall.html"];
MPMoviePlayerController *mp = [[MPMoviePlayerController alloc] initWithContentURL:mediaURL];
[[NSNotificationCenter defaultCenter] addObserver:self 
                                         selector:@selector(moviePlayBackDidFinish:) 
                                             name:MPMoviePlayerPlaybackDidFinishNotification 
                                           object:nil]; 

[mp setControlStyle:MPMovieControlStyleFullscreen];
[mp setMovieSourceType:MPMovieSourceTypeStreaming];
[mp setFullscreen:YES];

[self.view addSubview:[mp view]];

[mp prepareToPlay];
[mp play];

Actually the controller recieves MPMoviePlayerPlaybackDidFinishNotification without playing anything. Where is the problem?

回答1:

Your problem is probably with the URL. MPMoviePlayerController wants the URL directly to the file you want to play. You are providing the URL for an HTML page which the movie player doesn't understand. That is why it does work in UIWebView since a web browser understands HTML. If you want more information about what's wrong you can check the error doing the following, quoted from Apple's documentation:

To check for errors in URL loading, register for the MPMoviePlayerContentPreloadDidFinishNotification or MPMoviePlayerPlaybackDidFinishNotification notifications. On error, these notifications contain an NSError object available using the @"error" key in the notification’s userInfo dictionary.

It would look something like:

- (void) moviePlayBackDidFinish:(NSNotification*)notification {
    NSError *error = [[notification userInfo] objectForKey:@"error"];
    if (error) {
        NSLog(@"Did finish with error: %@", error);
    }
}

If you want to try and play that sample you can try and access the URL for the stream directly, which would be: http://devimages.apple.com/iphone/samples/bipbop/bipbopall.m3u8

回答2:

You should use direct link to play list file: http://devimages.apple.com/iphone/samples/bipbop/bipbopall.m3u8

NSURL *mediaURL = [NSURL URLWithString:@"http://devimages.apple.com/iphone/samples/bipbop/bipbopall.m3u8"];
MPMoviePlayerController *mediaPlayer = [[MPMoviePlayerController alloc] initWithContentURL:mediaURL];

回答3:

Try object:mp instead of object:nil in your NSNotification

回答4:

@Andrew:

Here is Apple documentation of HTTP Live Streaming including sample code http://developer.apple.com/library/ios/search/index.php?Search=HTTP+Live+Streaming+Overview

Dung.