Question

我正在尝试向我正在玩AVPlayer的视频添加反向播放：

let videoURL = Bundle.main.url(forResource: "video", withExtension: "mov")
videoPlayer = AVPlayer(url:videoURL!)
let playerLayer = AVPlayerLayer(player: videoPlayer)
playerLayer.frame = self.view.frame
videoView.layer.addSublayer(playerLayer)
videoPlayer.play()

我搜索并发现我是否将AVPlayer的费率更改为-1电影以反向模式播放：

 func reverseVideo()  {

        videoPlayer.play()
        videoPlayer.rate = -1
    }

这确实可以正常工作，但是反向播放包含很多延迟而且它没有顺利播放，有没有办法解决这个问题。我在这里读过其他话题，但没有帮助。

Answer 1

此代码对我来说可以在本地文件系统的反向播放avplayer中播放视频。

$(document).ready(function(){
    $('#form_id').bootstrapValidator({
        feedbackIcons: {
            valid: 'glyphicon glyphicon-ok',
            invalid: 'glyphicon glyphicon-remove',
            validating: 'glyphicon glyphicon-refresh'
        },
        fields:{
            first_name:{
                validators:{
                        stringLength: {
                        min: 2,
                    },
                        notEmpty: {
                        message: 'Please supply your first name'
                    }
                }
            }
        }
    })
});

Answer 2

尝试更换 videoPlayer.play() videoPlayer.rate = -1 videoPlayer.playImmediately(atRate: -1)

Answer 3

我不确定以下是否可以正常工作，因为我之前没有尝试过反向播放资产。我认为在开始比赛之前尝试结束是一个好主意。

player.seek(to: player.currentItem!.duration,
            toleranceBefore: kCMTimeZero,
            toleranceAfter: kCMTimeZero,
            completionHandler: { (finished) in
        player.play()
        player.rate = -1
    })

Answer 4

var durTime: CMTime = queuePlayer.currentItem.asset.duration
durationTime = CMTimeGetSeconds(durTime)

if CMTIME_IS_VALID(durTime) {
    queuePlayer.seek(toTime: durTime, toleranceBefore: kCMTimeZero, toleranceAfter: kCMTimeZero)
}
else {
    print("In valid time")
}

现在将AVPlayer的比率设置为负值

queuePlayer.rate = -1

反向AVPlayer反向播放问题

4 个答案: