iPhone上实现流媒体播放器

淩亂°似流年 2022-06-11 04:28 378阅读 0赞

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