iphone - 将 AVPlayer 快退 5 秒

Question

如何让流后退 5 秒？

这是我在 viewDidLoad 中进行流式传输的代码:

AVPlayerItem* playerItem = [AVPlayerItem playerItemWithURL:[NSURL URLWithString:@"http://groove.wavestreamer.com:7321/listen.pls?sid=1"]];

[playerItem addObserver:self forKeyPath:@"timedMetadata" options:NSKeyValueObservingOptionNew context:nil];

music = [[AVPlayer playerWithPlayerItem:playerItem] retain];
[music play]; 

music = [[AVPlayer playerWithPlayerItem:playerItem] retain];
[music play];

感谢您的回答...

Answer 1

在 Swift 3+ 中，

fileprivate let seekDuration: Float64 = 5


@IBAction func seekForward(_ sender: Any) {
    guard let duration  = player.currentItem?.duration else {
        return
    }
    let playerCurrentTime = CMTimeGetSeconds(player.currentTime())
    let newTime = playerCurrentTime + seekDuration

    if newTime < (CMTimeGetSeconds(duration) - seekDuration) {

        let time2: CMTime = CMTimeMake(Int64(newTime * 1000 as Float64), 1000)
        player.seek(to: time2, toleranceBefore: kCMTimeZero, toleranceAfter: kCMTimeZero)

    }
}
@IBAction func seekBackward(_ sender: Any) {

    let playerCurrentTime = CMTimeGetSeconds(player.currentTime())
    var newTime = playerCurrentTime - seekDuration

    if newTime < 0 {
        newTime = 0
    }
    let time2: CMTime = CMTimeMake(Int64(newTime * 1000 as Float64), 1000)
     player.seek(to: time2, toleranceBefore: kCMTimeZero, toleranceAfter: kCMTimeZero)


}