我通过AVPlayerItem
创建AVURLAsset
,我的代码:
let asset = AVURLAsset(URL: safeURL, options: [AVURLAssetPreferPreciseDurationAndTimingKey: true])
asset.loadValuesAsynchronouslyForKeys([assetKeyPlayable, self.assetKeyTracks, self.assetKeyHasProtectedContent]) {
() -> Void in
dispatch_async(dispatch_get_main_queue(), {
() -> Void in
// Use the AVAsset playable property to detect whether the asset can be played
if !asset.playable {
let localizedDescription = "Item cannot be played,Item cannot be played description"
let localizedFailureReason = "The assets tracks were loaded, but could not be made playable,Item cannot be played failure reason"
let userInfo = [NSLocalizedDescriptionKey: localizedDescription, NSLocalizedFailureReasonErrorKey: localizedFailureReason]
let error = NSError(domain: "domain", code: 0, userInfo: userInfo)
self.videoPlayerDelegate?.videoPlayer?(self, playerItemStatusDidFail: error)
self.cleanPlayer()
return
}
// At this point we're ready to set up for playback of the asset. Stop observing
if let _ = self.player?.currentItem {
self.cleanPlayer()
}
if asset.URL.absoluteString != safeURL.absoluteString {
return
}
var error: NSError?
let status = asset.statusOfValueForKey(self.assetKeyTracks, error: &error)
var playerItem = AVPlayerItem(URL: safeURL)
if status == .Loaded {
playerItem = AVPlayerItem(asset: asset)
} else {
// You should deal with the error appropriately.If Loaded fails, create an AVPlayerItem directly from the URL
playerItem = AVPlayerItem(URL: safeURL)
}
self.player = self.playerWithPlayerItem(playerItem)
self.registerMonitoring()
self.registerNotification()
self.addTimeObserver()
completionBlock?(loadURLString: playerURL.absoluteString)
})
}
在我的视图中添加AVPlayerLayer
显示视频,我的代码:
// MARK: - 财产
var player: AVPlayer? {
get {
return playerLayer.player
}
set {
playerLayer.player = newValue
}
}
var playerLayer: AVPlayerLayer {
return layer as! AVPlayerLayer
}
完成加载后显示视频
self.videoPlayer?.loadPlayer({
[weak self](loadURLString) in
if let strongSelf = self {
strongSelf.player = strongSelf.videoPlayer?.player
strongSelf.startPlay()
}
})
调用seekToTime
方法来指定播放:
self.player?.currentItem?.seekToTime(CMTimeMakeWithSeconds(time, Int32(NSEC_PER_SEC)), toleranceBefore: kCMTimeZero, toleranceAfter: kCMTimeZero) {
[weak self] finished in
if let weakSelf = self {
if weakSelf.isPlaying {
weakSelf.videoPlayerDelegate?.videoPlayerDidplayerItemSeekToTime?(weakSelf)
}
}
}
卡住界面的一些图片:
在第一张图片中,声音是可听见的,但界面卡住了。
在第二张图片中,视频有效,但我没有声音。
我的问题:
当我在完成时调用seekToTime
方法时,有时视频会有声音,但界面会卡住,偶尔视频也能正常工作。我试图调用CALayer
setNeedsDisplay
方法,更新AVPlayerLayer
图片,但这没有帮助。我不知道该怎么办,我会感激每一个和任何帮助。
尝试这种方法,因为我遇到了同样的问题,并通过这种方法解决它。
player.pause()
player.currentItem?.seek(to: CMTime(), completionHandler: { (_) in
player.play()
})
由于我们很多人以不同的方式发生这种情况并且没有得到解答,我在这里回答它,对我而言,当我尝试使用AVPlayer和AVPlayerLayer在UIView中播放视频但是当我使用相同的AVPlayer时在AVPlayerViewController中加载视频,视频卡住了,音频一直在播放。
诀窍是在其他地方使用相同的AVPlayer之前销毁AVPlayerLayer,Cant相信我在这里找到了这个启示。
https://twitter.com/skumancer/status/294605708073263104
我是如何实现的?
我在主故事板中创建了2个视图控制器。
1)查看控制器场景i)其中有一个UIView,参考IBOutlet'videoView'ii)一个带有segue导航的按钮,以'显示'AV播放器视图控制器场景参考IBOutlet'全屏'2)AV播放器视图控制器场景
// Code in your controller class.
// Make sure to reference your IBOutlet in your StoryBoard.
@IBOutlet weak var videoView : UIView!
@IBOutlet weak var fullscreen : UIButton!
var player:AVPlayer? = nil;
var playerLayer:AVPlayerLayer? = nil;
override func viewDidLoad() {
super.viewDidLoad()
// Your Url to play, could be hls type video
let url = URL(string: "https://your_url.m3u8");
let asset = AVAsset(url : url!)
let playerItem = AVPlayerItem(asset: asset)
player = AVPlayer(playerItem: playerItem)
}
override func viewDidAppear(_ animated: Bool) {
playInUIView()
pauseVideo()
}
// Creates An AVPlayerLayer and adds it as a sublayer in UIView.
func playInUIView(){
// Creating player layer to render video.
playerLayer = AVPlayerLayer(player: player)
playerLayer?.frame = self.videoView.bounds
playerLayer?.videoGravity = .resizeAspect
// Adding a sub layer to display it in UIView
self.videoView.layer.addSublayer(playerLayer!)
}
// Destroyes an AVPlayerLayer and Sublayer of your UIView
func destroyPlayInView(){
self.videoView.layer.sublayers=nil
playerLayer = nil
}
// On button click open AVPlayerViewController.
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let destination = segue.destination as! AVPlayerViewController
// Destroy AVPlayerLayer before rendering video in AVPlayerViewController.
destroyPlayInView()
// Set same AVPlayer in AVPlayerViewController.
destination.player = self.player
self.present(destination, animated: true) {
destination.player!.play()
}
}
PS - 我还没有实现任何控件,因为我刚刚开始使用swift和IOS开发几天后可能会出现编码不当行为,所以请在任何我错的地方告诉我。
用户nferocious76的相同代码,但在Objective C中
AVPlayerItem *p = [player currentItem];
[p seekToTime:p.currentTime completionHandler:^(BOOL finished){
if (finished){
[self->player play];
}
}];