ios - 制作像回旋镖一样的视频循环效果
<p><p>我正在尝试从 mp4 文件制作视频循环。就像 instagram 应用程序的回旋镖一样，我有这个代码 </p>
<pre><code>class ViewController: UIViewController {
var avPlayer: AVPlayer!
var avPlayerLayer: AVPlayerLayer!
var paused: Bool = false
var reverse: Bool = true
override func viewDidLoad() {
super.viewDidLoad()
let theURL = Bundle.main.url(forResource:"vidio", withExtension: "mp4")
avPlayer = AVPlayer(url: theURL!)
avPlayerLayer = AVPlayerLayer(player: avPlayer)
avPlayerLayer.videoGravity = AVLayerVideoGravityResizeAspectFill
avPlayer.volume = 0
avPlayer.actionAtItemEnd = .none
avPlayerLayer.frame = view.layer.bounds
view.backgroundColor = .clear
view.layer.insertSublayer(avPlayerLayer, at: 0)
NotificationCenter.default.addObserver(self,
selector: #selector(playerItemDidReachEnd(notification:)),
name: NSNotification.Name.AVPlayerItemDidPlayToEndTime,
object: avPlayer.currentItem)
}
func playerItemDidReachEnd(notification: Notification) {
guard reverse else {
avPlayer.seek(to: kCMTimeZero)
avPlayer.rate = 1.0
reverse = true
print("normal")
return
}
print("reversa")
avPlayer.seek(to: avPlayer.currentItem!.duration,
toleranceBefore: kCMTimeZero,
toleranceAfter: kCMTimeZero)
avPlayer.rate = -1.0
reverse = false
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
avPlayer.play()
paused = false
}
override func viewDidDisappear(_ animated: Bool) {
super.viewDidDisappear(animated)
avPlayer.pause()
paused = true
}
}
</code></pre>
<p>但是当视频反转时，它看起来并不流畅，并且反转不是从视频的最后部分开始的。任何想法如何解决这个问题？
我希望视频看起来像在回旋镖应用循环中一样流畅</p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>我建议使用图像而不是视频，因为您可以创建一组图像，然后循环遍历它们以获得相同的效果，但难度较小。</p></p>
<p style="font-size: 20px;">关于ios - 制作像回旋镖一样的视频循环效果，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/45359634/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/45359634/
</a>
</p>
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