GPUImageMovie：播放完成后如何显示视频的第一帧？

Question

这里是我如何设定播放：播放完毕

movie = GPUImageMovie(url: url) 
movie.playAtActualSpeed = true 
movie.delegate = self 
movie.addTarget(self) 
movie.startProcessing() 

后，GPUImageView显示视频文件的最后一帧。如何将其更改为第一帧？

Answer 1

我们可以用AVPlayerItem，让AVPlayer处理回放我们：

func configure(url: URL) { 
    // player is AVPlayer instance declated as property 
    let playerItem = AVPlayerItem(url: url) 
    player.replaceCurrentItem(with: playerItem) 
    NotificationCenter.default.addObserver(self, selector: #selector(playerDidFinishPlaying(_:)), name: NSNotification.Name.AVPlayerItemDidPlayToEndTime, object: playerItem) 

    movie = GPUImageMovie(playerItem: playerItem) 
    movie.playAtActualSpeed = true 
    movie.addTarget(self) 
    movie.startProcessing() 
} 

func playerDidFinishPlaying(_ notification: Notification) { 
    guard player.currentItem == notification.object as? AVPlayerItem else { return } 
    player.seek(to: kCMTimeZero) 
}