小编HSG*_*HSG的帖子

我有一个需求：在播放视频流（m3u8）之前获取帧图像，作为视频预览显示。我使用AVPlayerItemVideoOutpu copyPixelBufferForItemTime：itemTimeForDisplay：仅当播放视频流以获取帧图像时，您还有其他方法吗？谢谢！！

这是我的代码：

CMTime itemTime = self.playerItem.currentTime;
CVPixelBufferRef pixelBuffer = [_playerItemVideoOutput copyPixelBufferForItemTime:itemTime itemTimeForDisplay:nil];
CIImage *ciImage = [CIImage imageWithCVPixelBuffer:pixelBuffer];
CIContext *temporaryContext = [CIContext contextWithOptions:nil];
CGImageRef videoImage = [temporaryContext
                                 createCGImage:ciImage
                                 fromRect:CGRectMake(0, 0,
                                                     CVPixelBufferGetWidth(pixelBuffer),
                                                     CVPixelBufferGetHeight(pixelBuffer))];

UIImage *uiImage = [UIImage imageWithCGImage:videoImage];
CGImageRelease(videoImage);
NSLog(@"uiImage?%@", uiImage);