获取iPhone上的流媒体视频截图

2018-06-18 06:16:13

我怎样才能得到iPhone上的流媒体视频的截图。我尝试了几种方法。

UIGetScreenImage（） - >这是私人的。如果我使用它，该应用程序将被拒绝。

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

The code above cannot take the screenshot of video layer.

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AVFoundation之外，我还有什么可以尝试。谢谢。

不知道它是否会工作，但你有没有尝试过使用AVPlayer？它应该允许你访问你可以传递给AVAssetImageGenerator的AVURLAsset。

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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