AVPlayer没有显示任何内容。

Question

AVPlayer没有显示任何内容。

iosobjective-cyoutubeavplayeravplayerlayer

8

我尝试嵌入来自Youtube、Vimeo和Dailymotion的不同视频。

不幸的是，目前除了我的容器视图的背景颜色之外，什么也没有显示出来：

UIView *containerView = [[UIView alloc] initWithFrame:CGRectMake(0.0f, 0, 320.0f, 200.0f)];

//item.url is my url which i get fro my webserver, it looks like http://www.youtube.com/watch?v=zPP6lXaL7KA&feature=youtube_gdata_player

            AVPlayerItem *playerItem = [AVPlayerItem playerItemWithURL:[NSURL fileURLWithPath:item.url]];

            AVPlayer *avPlayer = [AVPlayer playerWithPlayerItem:playerItem];

            NSLog(@"%@",playerItem);

            AVPlayerLayer *avPlayerLayer = [AVPlayerLayer playerLayerWithPlayer:avPlayer];

            avPlayerLayer.frame = self.frame;
            [containerView.layer addSublayer:avPlayerLayer];
            [self addSubview:containerView];
            [avPlayer play];

            if (avPlayer.status == AVPlayerStatusReadyToPlay) {
                //[playingLbl setText:@"Playing Audio"];
                NSLog(@"It works");

            } else if (avPlayer.status == AVPlayerStatusFailed) {
                // something went wrong. player.error should contain some information
                NSLog(@"Not works");
                NSLog(@"%@",avPlayer.error);             
            }
            else if (avPlayer.status == AVPlayerItemStatusUnknown) {
                NSLog(@"AVPlayer Unknown");
            }

            containerView.backgroundColor = [UIColor blueColor];
            NSLog(@"error: %@", avPlayer.error);
            NSLog(@"AVPlayer: %@", avPlayer);

AVPlayer错误为空，我总是从状态中得到AVPlayerItemStatusUnknown的日志。有什么想法吗？

编辑1：我将我的代码更改为：

@implementation VideoView

BlockVideo *list;

- (id)initWithBlock:(GFBlock *)block {
    self = [super initWithBlock:block];

if (self) {

    if (block.values && block.values.count) {
        list = (GFBlockVideo *) [block.values objectAtIndex:0];

        for (int i=0; i<list.videos.count; ++i) {

            GFBlockVideoItem *item = list.videos[i];
            UIView *containerView = [[UIView alloc] initWithFrame:CGRectMake(0.0f, 0, 320.0f, 200.0f)];


//Like i said item.url = http://www.youtube.com/watch?v=zPP6lXaL7KA&feature=youtube_gdata_player
//@property (nonatomic, strong) NSString* url;

             AVAsset *asset = [AVAsset assetWithURL:[NSURL URLWithString:item.url]];
             AVPlayerItem *playerItem = [[AVPlayerItem alloc] initWithAsset:asset];
             AVPlayer *avPlayer = [AVPlayer playerWithPlayerItem:playerItem];
             AVPlayerLayer *avPlayerLayer = [AVPlayerLayer playerLayerWithPlayer:avPlayer];

             avPlayerLayer.frame = containerView.frame;
            [containerView.layer addSublayer:avPlayerLayer];
            [self addSubview:containerView];
            [avPlayer play];

             containerView.backgroundColor = [UIColor blueColor];

很遗憾，我只能看到蓝色的 containerView :/

enter image description here

我认为问题不在 AVPlayer 本身，而可能是帧和层。

- Davis

确保 AVPlayerLayer 的框架大小正确。 - onmyway133

实际上，你不能通过AVPlayer播放此链接http://www.youtube.com/watch?v=zPP6lXaL7KA&feature=youtube_gdata_player... 你需要该视频的直接链接... - Che

3个回答

1

适合我的AVPlayer实现方式：

MP4：

player = [AVPlayer playerWithURL:videoPathUrl];
AVcontroller = [[AVPlayerViewController alloc] init];
[AVcontroller.view setFrame:CGRectMake(0, 0,self.view.frame.size.width, self.view.frame.size.width)];
AVcontroller.player = player;
AVcontroller.showsPlaybackControls = FALSE;
[self addChildViewController:AVcontroller];
[self.view addSubview:AVcontroller.view];
[player play];

MP3 :

 playerItem = [AVPlayerItem playerItemWithURL:url];
    player = [AVPlayer playerWithPlayerItem:playerItem];
    player = [AVPlayer playerWithURL:url];
    [player play];

获取视频缩略图，试试这个。

AVAsset *asset = [AVAsset assetWithURL:videoPathUrl];
 AVAssetImageGenerator *imageGenerator = [[AVAssetImageGenerator alloc]initWithAsset:asset];
float tempTime = CMTimeGetSeconds(player.currentItem.duration);
CMTime time = CMTimeMake(tempTime, 1);  // (1,1)
CGImageRef imageRef = [imageGenerator copyCGImageAtTime:time actualTime:NULL error:NULL];
UIImage *aThumbnail = [UIImage imageWithCGImage:imageRef];

停止视频。

[player pause];
player = nil;

**为视频设置播放速率/速度**

[player play];
[player setRate:currentRate];

从头开始播放

[player seekToTime:kCMTimeZero];
 [player play];

用于检查视频是否正在播放

 if ((player.rate != 0) && (player.error == nil)) {
// playing

}

寻找视频（提前一段时间）

float tempSeekTime = CMTimeGetSeconds(player.currentItem.duration) + 10;
CMTime targetTime = CMTimeMakeWithSeconds(tempSeekTime, NSEC_PER_SEC);
[player seekToTime:targetTime];

- Bhupendrasingh Lohar

0

使用PHImageManager的requestPlayerItemForVideo方法获取AVPlayerItem，这是播放AVAsset的最简单、最可靠的方法，可以完美、一致地执行。

我在这里使用它：

https://youtu.be/7QlaO7WxjGg

- James Bush

网页内容由stack overflow 提供, 点击上面的

可以查看英文原文，
原文链接

- Unheilig · Accepted Answer

你需要按照以下步骤进行：

AVAsset *asset = [AVAsset assetWithURL:[NSURL fileURLWithPath:item.url]];
AVPlayerItem *playerItem = [[AVPlayerItem alloc] initWithAsset:asset];
AVPlayer *avPlayer = [AVPlayer playerWithPlayerItem:playerItem];
AVPlayerLayer *avPlayerLayer = [AVPlayerLayer playerLayerWithPlayer:avPlayer];

avPlayerLayer.frame = self.frame;
[containerView.layer addSublayer:avPlayerLayer];
[self addSubview:containerView];
[avPlayer play];

希望这能有所帮助。

补充说明：

这也取决于您的URL；如果像您所说的那样，您的URL格式如下：

http://www.youtube.com/watch?v=zPP6lXaL7KA&feature=youtube_gdata_player

然后你应该使用这个代替：

[NSURL urlWithString:item.url];

假设item是你的对象，url是该对象的一个属性，类型为NSString。