Question

在我的应用中，我从服务器获取视频网址列表并下载并以.mp4格式保存到我应用的文档目录路径。下载过程为ASIHTTPRequest方法，然后按照自定义视频名称进行保存。

下载视频方法：

-(void)downloadVideoFile: (NSString *)UrlString URLname:(NSString *)videoName
{
    NSString* urlTextEscaped = [UrlString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
    NSURL * urlStr = [NSURL URLWithString:urlTextEscaped];
    ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:urlStr];
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *savedVideoPath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.mp4", videoName]];
    BOOL fileExists = [[NSFileManager defaultManager] fileExistsAtPath:savedVideoPath];

    if(!fileExists)
    {
        [request setDownloadDestinationPath:savedVideoPath];
        [request setDelegate:self];
        [request setTimeOutSeconds:800];
        [request setNumberOfTimesToRetryOnTimeout:3];
        [request startAsynchronous];
    }
}

当我在MPMoviePlayerController播放器上播放视频时，通过从文档目录中获取已下载的视频，正在播放，但没有音频。

这是MPMoviePlayerController播放器方法：

   -(void)playVideoFile:(int)index_SavedPathIndex
    {
        index_Selected_CollectionVwCell = index_SavedPathIndex;
        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        NSString *documentsDirectory = [paths objectAtIndex:0];
        NSString *savedVideoPath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.mp4",[arrayProgramID objectAtIndex:index_SavedPathIndex]]];
        BOOL fileExists = [[NSFileManager defaultManager] fileExistsAtPath:savedVideoPath];

        if(fileExists)
        {

            player = [[MPMoviePlayerController alloc] initWithContentURL:[NSURL fileURLWithPath:savedVideoPath]];
            [player prepareToPlay];
            player.view.frame = CGRectMake(0,0,self.view.frame.size.width, self.view.frame.size.height);
            [self.view addSubview:player.view];
            player.controlStyle = MPMovieControlStyleNone;
            player.scalingMode = MPMovieScalingModeAspectFill;
            player.view.userInteractionEnabled = YES;
            [[NSNotificationCenter defaultCenter] addObserver:self
                                                     selector:@selector(playbackDidFinish:)
                                                         name:MPMoviePlayerPlaybackDidFinishNotification
                                                       object:nil];
            [player play];
    }
}

我直接在文档目录中播放Quick Time Player中的视频，即使它没有 NO AUDIO 播放。然后我只是从窗口系统中的文档目录中播放下载的视频，奇怪的是它与音频一起播放。

我还尝试了另一种下载方法但不影响。我也改变了视频格式，但音频错误相同。

如果有人可以，请帮助：提前致谢。

MPMoviePlayerController播放器播放没有音频的视频

0 个答案: