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在iphone上获取流媒体视频的屏幕截图

[英]Get the screenshot of a streaming video on iphone

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。

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

  2. UIGraphicsBeginImageContext(CGSizeMake(1024,768)); [self.view.layer renderInContext:UIGraphicsGetCurrentContext()]; UIImage * viewImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext();

     The code above cannot take the screenshot of video layer. 
  3. MPMoviePlayerController * movie = [[MPMoviePlayerController alloc] initWithContentURL [NSURL URLWithString:@“myMovie.mp4”]]; UIImage * singleFrameImage = [movie thumbnailImageAtTime:10 timeOption:MPMovieTimeOptionExact];

     The code above does not work on a streaming video. 

除了AVFoundation,我还能尝试什么? 谢谢。

不确定它是否可行,但你尝试过使用AVPlayer吗? 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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