ios - 拍摄 AVPlayer 的屏幕截图但它适用于某些视频

Question

我正在用这个截取 avPlayer 的屏幕截图..

    print(startTime)
    print(Float64(startTime))
    var time: CMTime = CMTimeMakeWithSeconds(Float64(startTime), 100000000)

    do {
        print(time)
    let imageRef: CGImageRef = try imageGenerator.copyCGImageAtTime(time, actualTime: &time)
    let thumbnail: UIImage = UIImage(CGImage: imageRef)



   UIImageWriteToSavedPhotosAlbum(thumbnail, nil, nil, nil)

在这里，我正在获取屏幕截图，但当我想要时它并不完美。但对于某些视频，它工作完美。请指导我，谢谢。

Answer 1

得到确切的解决方案...

func screenshotCMTime(cmTime: CMTime)  -> (UIImage)?
{
guard let player = player,let asset = player.currentItem?.asset else 
{
            return nil
 }
        let imageGenerator = AVAssetImageGenerator(asset: asset)

        var timePicture = kCMTimeZero
        imageGenerator.appliesPreferredTrackTransform = true
        imageGenerator.requestedTimeToleranceAfter = kCMTimeZero
        imageGenerator.requestedTimeToleranceBefore = kCMTimeZero
        do {
        let ref = try imageGenerator.copyCGImageAtTime(cmTime, actualTime: &timePicture)

        image = UIImage(CGImage: ref)
        }catch {
            error as NSError

        }
        return image
    }