iPhone上实现流媒体播放器

      首先，获取到视频的截图

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    UITableViewCell *movieCell = [DataTable dequeueReusableCellWithIdentifier:@"movieCell"];
    if (movieCell==nil) {
        movieCell = [[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"movieCell"]autorelease];
    }
    NSString *linkStr = [linkArray objectAtIndex:indexPath.row];
    movieCell.textLabel.text = linkStr;
    MPMoviePlayerController *movieController = [[MPMoviePlayerController alloc]initWithContentURL:[NSURL URLWithString:linkStr]];
    [movieController requestThumbnailImagesAtTimes:[NSArray arrayWithObject:[NSNumber numberWithDouble:0]] timeOption:MPMovieTimeOptionNearestKeyFrame];
    [[NSNotificationCenter defaultCenter]addObserver:self
                                            selector:@selector(movieThumbnailLoadComplete:) name:MPMoviePlayerThumbnailImageRequestDidFinishNotification object:movieController];
    return movieCell;
}

-(void)movieThumbnailLoadComplete:(NSNotification*)notification{
    NSDictionary *userInfo = [notification userInfo];
    NSLog(@"userInfo:%@",userInfo);
	NSNumber *timecode = 
    [userInfo objectForKey: @"MPMoviePlayerThumbnailTimeKey"];	
	UIImage *image = 
    [userInfo objectForKey: @"MPMoviePlayerThumbnailImageKey"];
}

    点击后，启动播放

-(void)initPlayer{
    //显示loadingView
    [loadingView show:YES];
    //使用playerItem获取视频的信息，当前播放时间，总时间等
    AVPlayerItem *playerItem = [AVPlayerItem playerItemWithURL:movieURL];
    //player是视频播放的控制器，可以用来快进播放，暂停等
    AVPlayer *player = [AVPlayer playerWithPlayerItem:playerItem];
    [moviePlayeView setPlayer:player];
    [moviePlayeView.player play];
    //计算视频总时间
    CMTime totalTime = playerItem.duration;
    //因为slider的值是小数，要转成float，当前时间和总时间相除才能得到小数,因为5/10=0
    totalMovieDuration = (CGFloat)totalTime.value/totalTime.timescale;
    //NSLog(@"totalMovieDuration:%f",totalMovieDuration);
    //在totalTimeLabel上显示总时间
    totalTimeLabel.text = [self convertMovieTimeToText:totalMovieDuration];
    
    //检测视频加载状态，加载完成隐藏loadingView
    [moviePlayeView.player.currentItem addObserver:self
                                        forKeyPath:@"status" 
                                           options:NSKeyValueObservingOptionNew
                                           context:nil];
    //添加视频播放完成的notifation
    [[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(moviePlayDidEnd:) name:AVPlayerItemDidPlayToEndTimeNotification object:moviePlayeView.player.currentItem];
}

    上述代码来源：https://github.com/yuyi012/VideoStreamDemo2