在iphone上获取流媒体视频的屏幕截图

如何在iphone上获取流媒体视频的屏幕截图。我尝试了几种方法

UIGetScreenImage（）->这是私有的。如果我使用该应用程序，它将被拒绝

UIGraphicsBeginImageContext（CGSizeMake（1024768））； [self.view.layer renderContext:UIGraphicsGetCurrentContext（）]； UIImage*viewImage=UIGraphicsGetImageFromCurrentImageContext（）； UIGraphicsSendImageContext（）

MPMoviePlayerController*电影=[[MPMoviePlayerController alloc] initWithContentURL[nsurlUrlWithString:@“myMovie.mp4”]； UIImage*singleFrameImage=[movie ThumbnailImageTime:10 时间选项：MPMovieTimeOptionExact]

The code above does not work on a streaming video.

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除了AVFoundation，我还能尝试什么。谢谢。

不确定它是否有效，但您是否尝试过使用AVPlayer？它应该允许您访问AVURLAsset，您可以将其传递给AVAssetImageGenerator

AVPlayerItem *item = [AVPlayerItem playerItemWithURL:yourURL];
AVPlayer *player = [AVPlayer playerWithPlayerItem:pItem];

//observe 'status'
[playerItem addObserver:self forKeyPath:@"status" options:0 context:nil];

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object
                        change:(NSDictionary *)change context:(void *)context
{ 
    if ([keyPath isEqualToString:@"status"]) {
        AVPlayerItem *item = (AVPlayerItem *)object;
        if (item.status == AVPlayerItemStatusReadyToPlay) {
            AVURLAsset *asset = (AVURLAsset *)item.asset;
            AVAssetImageGenerator *imageGenerator = [[AVAssetImageGenerator alloc] initWithAsset:asset];
            CGImageRef thumb = [imageGenerator copyCGImageAtTime:CMTimeMakeWithSeconds(10.0, 1.0)
                                                      actualTime:NULL
                                                           error:NULL];
        }
    }   
}

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我自己还没有尝试过，但也许可以查看CALayer并将其保存为图像，或者读取其中的每个像素并将其保存为图像？也可以尝试在AVPlayerLayer上使用RenderContext:。还可以添加行：imageGenerator.appliesPreferredTrackTransform=YES；如果播放的视频具有不同的旋转。请确保CGImageRelease（拇指）；（也在ARC中）

AVPlayerItem *item = [AVPlayerItem playerItemWithURL:yourURL];
AVPlayer *player = [AVPlayer playerWithPlayerItem:pItem];

//observe 'status'
[playerItem addObserver:self forKeyPath:@"status" options:0 context:nil];

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object
                        change:(NSDictionary *)change context:(void *)context
{ 
    if ([keyPath isEqualToString:@"status"]) {
        AVPlayerItem *item = (AVPlayerItem *)object;
        if (item.status == AVPlayerItemStatusReadyToPlay) {
            AVURLAsset *asset = (AVURLAsset *)item.asset;
            AVAssetImageGenerator *imageGenerator = [[AVAssetImageGenerator alloc] initWithAsset:asset];
            CGImageRef thumb = [imageGenerator copyCGImageAtTime:CMTimeMakeWithSeconds(10.0, 1.0)
                                                      actualTime:NULL
                                                           error:NULL];
        }
    }   
}