我正在使用
AVQueuePlayerAVPlayerItemAVQueuePlayerAVQueuePlayer我正在使用
insertItem:afterItem:AVPlayerItemAVPlayerItemAVQueuePlayer必须指出，我正在使用 Dropbox API v1 beta 通过使用此方法调用来获取流媒体 URL：
[[self restClient] loadStreamableURLForFile:metadata.path];
然后，当我收到流 URL 时，我会将其发送到
AVQueuePlayer[self.player insertItem:[AVPlayerItem playerItemWithURL:url] afterItem:nil];
所以我的问题是：如何避免这种情况？ 我应该在没有
AVPlayer谢谢。
不要使用
playerItemWithURLAVURLAsset *asset = [[AVURLAsset alloc] initWithURL:url options:nil];
NSArray *keys = @[@"playable"];
[asset loadValuesAsynchronouslyForKeys:keys completionHandler:^() {
[self.player insertItem:[AVPlayerItem playerItemWithAsset:asset] afterItem:nil];
}];
Bump，因为这是一个评价很高的问题，而网上类似的问题要么有过时的答案，要么不太好。
AVKitAVFoundationAVFoundationPlayer()urlUITableViewUICollectionViewsAVAssetcancellableAVAssetloadValuesAsynchronously不要忘记使用
loadValuesAsynchronouslyTL；博士
let asset = AVAsset(url: URL(string: self.YOUR_URL_STRING))
let keys: [String] = ["playable"]
var player: AVPlayer!
asset.loadValuesAsynchronously(forKeys: keys, completionHandler: {
var error: NSError? = nil
let status = asset.statusOfValue(forKey: "playable", error: &error)
switch status {
case .loaded:
DispatchQueue.main.async {
let item = AVPlayerItem(asset: asset)
self.player = AVPlayer(playerItem: item)
let playerLayer = AVPlayerLayer(player: self.player)
playerLayer.videoGravity = AVLayerVideoGravity.resizeAspectFill
playerLayer.frame = self.YOUR_VIDEOS_UIVIEW.bounds
self.YOUR_VIDEOS_UIVIEW.layer.addSublayer(playerLayer)
self.player.isMuted = true
self.player.play()
}
break
case .failed:
DispatchQueue.main.async {
//do something, show alert, put a placeholder image etc.
}
break
case .cancelled:
DispatchQueue.main.async {
//do something, show alert, put a placeholder image etc.
}
break
default:
break
}
})
注意：
根据您的应用程序想要实现的目标，您可能仍然需要进行一些修改来调整它，以获得
UITableViewUICollectionViewAVPlayerItemAVPlayerItem要循环播放视频，可以使用上面相同的方法并介绍
AVPlayerLooperdurationlet asset = AVAsset(url: URL(string: self.YOUR_URL_STRING))
let keys: [String] = ["playable","duration"]
var player: AVPlayer!
var playerLooper: AVPlayerLooper!
asset.loadValuesAsynchronously(forKeys: keys, completionHandler: {
var error: NSError? = nil
let status = asset.statusOfValue(forKey: "duration", error: &error)
switch status {
case .loaded:
DispatchQueue.main.async {
let playerItem = AVPlayerItem(asset: asset)
self.player = AVQueuePlayer()
let playerLayer = AVPlayerLayer(player: self.player)
//define Timerange for the loop using asset.duration
let duration = playerItem.asset.duration
let start = CMTime(seconds: duration.seconds * 0, preferredTimescale: duration.timescale)
let end = CMTime(seconds: duration.seconds * 1, preferredTimescale: duration.timescale)
let timeRange = CMTimeRange(start: start, end: end)
self.playerLooper = AVPlayerLooper(player: self.player as! AVQueuePlayer, templateItem: playerItem, timeRange: timeRange)
playerLayer.videoGravity = AVLayerVideoGravity.resizeAspectFill
playerLayer.frame = self.YOUR_VIDEOS_UIVIEW.bounds
self.YOUR_VIDEOS_UIVIEW.layer.addSublayer(playerLayer)
self.player.isMuted = true
self.player.play()
}
break
case .failed:
DispatchQueue.main.async {
//do something, show alert, put a placeholder image etc.
}
break
case .cancelled:
DispatchQueue.main.async {
//do something, show alert, put a placeholder image etc.
}
break
default:
break
}
})
编辑：根据文档，
AVPlayerLooperdurationtimeRange: timeRangeAVPlayerLooperAVPlayerLooperAVAsset//this will loop the video since this is a Gif
let interval = CMTime(value: 1, timescale: 2)
self.timeObserverToken = self.player?.addPeriodicTimeObserver(forInterval: interval, queue: DispatchQueue.main, using: { (progressTime) in
if let totalDuration = self.player?.currentItem?.duration{
if progressTime == totalDuration{
self.player?.seek(to: kCMTimeZero)
self.player?.play()
}
}
})
Gigisommo 对 Swift 3 的回答，包括评论的反馈：
let asset = AVAsset(url: url)
let keys: [String] = ["playable"]
asset.loadValuesAsynchronously(forKeys: keys) {
DispatchQueue.main.async {
let item = AVPlayerItem(asset: asset)
self.playerCtrl.player = AVPlayer(playerItem: item)
}
}
Task {
let asset = AVAsset(url: url)
let playable = try await asset.load(.isPlayable)
if playable {
player = AVPlayer(playerItem: .init(asset: asset))
player.play()
}
}