在iOS 4.0中使用AVPlayer进行HTTP直播 [英] HTTP Live Streaming with AVPlayer in iOS 4.0?

问题描述

是否可以在iOS 4.0上使用带有AVPlayer的HTTP Live Streaming？这显然是4.0的记录功能。但是，如果我运行 Apple's运行iOS 4.0.1的3GS上的SitchedStreamPlayer示例代码，单击加载电影不会播放流，但会出错：

Is it possible to use HTTP Live Streaming with AVPlayer on iOS 4.0? This was clearly a documented feature of 4.0. However, if I run Apple's SitchedStreamPlayer sample code on my 3GS running iOS 4.0.1, clicking "Load Movie" does not play the stream, but gives an error:

2011-06-21 13：14：49.428 StitchedStreamPlayer [680：307]由于错误，未加载资产的曲目：
无法打开

2011-06-21 13:14:49.428 StitchedStreamPlayer[680:307] The asset's tracks were not loaded due to an error: Cannot Open

MPMediaPlayer可以播放相同的流相同的设备。但是，我需要一个使用AVPlayer的工作解决方案。

MPMediaPlayer is able to play the same stream on the same device. However, I need a working solution with AVPlayer.

有谁知道如何让Apple的StichedStreamPlayer代码在4.0上运行？运行时要求说它应该适用于iOS 4.0或更高版本。

Does anyone know how to get Apple's StichedStreamPlayer code to work on 4.0? The Runtime Requirements say it should work on "iOS 4.0 or later".

谢谢！

推荐答案

这是4.0中的一个错误，但我找到了一个解决方法。以下是使用AVPlayer加载视频的正确方法：

This is a bug in 4.0, but I found a workaround. Here is the correct way to load video with AVPlayer:

    AVPlayer *player = [AVPlayer playerWithURL:[NSURL URLWithString:@"http://qtdevseed.apple.com/addemo/ad.m3u8"]];
// now use KVO to decide when it's ready to play
// works in both 4.3 and 4.0.1

 

StitchedStreamPlayer的代码工作在4.3但不是4.0.1：

The code from StitchedStreamPlayer works in 4.3 but not 4.0.1:

AVURLAsset *asset = [AVURLAsset URLAssetWithURL:[NSURL URLWithString:@"http://qtdevseed.apple.com/addemo/ad.m3u8"] options:nil];
    NSArray *tracksKeys = [NSArray arrayWithObjects:kTracksKey, kDurationKey, kPlayableKey, nil];
    [asset loadValuesAsynchronouslyForKeys:tracksKeys completionHandler:
     ^{
         NSError *error = nil;
         AVKeyValueStatus status = [asset statusOfValueForKey:[tracksKeys objectAtIndex:0] error:&error];
         NSLog(@"status=%@,error=%@",(status==AVKeyValueStatusLoaded?@"Loaded":status==AVKeyValueStatusFailed?@"Failed":@"?!"),error);
     }];

// output in 4.3: status=Loaded,error=(null)
// output in 4.0.1:  status=Failed,error=Error Domain=AVFoundationErrorDomain Code=-11828 "Cannot Open" UserInfo=0x15f2a0 {NSLocalizedFailureReason=This media format is not supported., NSUnderlyingError=0x1599e0 "The operation couldn’t be completed. (OSStatus error -12847.)", NSLocalizedDescription=Cannot Open}

 

有关详细信息，请参阅旧版本的StitchedStreamPlayer 。

For more info see the old version of StitchedStreamPlayer.

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