AVPlayer 截屏（swift3.0）

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开始做的是一般的vod视频截屏，用AVAssetImageGenerator对象就可以实现，而且可以截取任意时间点的视频图像

片段代码：
 open func generateThumbnails(times: [TimeInterval],maximumSize: CGSize, completionHandler: @escaping (([EZPlayerThumbnail]) -> Swift.Void )){
        guard let imageGenerator = self.imageGenerator else {
            return;
        }
        
        var values = [NSValue]()
        for time in times {
            values.append(NSValue(time: CMTimeMakeWithSeconds(time,CMTimeScale(NSEC_PER_SEC))))
        }
        
        var thumbnailCount = values.count
        var thumbnails = [EZPlayerThumbnail]()
        imageGenerator.cancelAllCGImageGeneration()
        imageGenerator.appliesPreferredTrackTransform = true
        imageGenerator.maximumSize = maximumSize
        imageGenerator.generateCGImagesAsynchronously(forTimes:values) { (requestedTime: CMTime,image: CGImage?,actualTime: CMTime,result: AVAssetImageGeneratorResult,error: Error?) in
            
            let thumbnail = EZPlayerThumbnail(requestedTime: requestedTime, image: image == nil ? nil :  UIImage(cgImage: image!) , actualTime: actualTime, result: result, error: error)
            thumbnails.append(thumbnail)
            thumbnailCount -= 1
            if thumbnailCount == 0 {
                DispatchQueue.main.async {
                    completionHandler(thumbnails)
                    NotificationCenter.default.post(name: .EZPlayerThumbnailsGenerated, object: self, userInfo: [Notification.Key.EZPlayerThumbnailsKey:thumbnails])
                }
                
            }
        }
    }

 

 

后来对m3u8截屏发现拿不到流，哦这方法应该对HLS流不行,后来发现AVPlayerItemVideoOutput可以实现,但是只能截取最新的播放的视频图片

片段代码：
  func snapshotImage() -> UIImage? {
        guard let playerItem = self.playerItem else {  //playerItem is AVPlayerItem
            return nil
        }
        
        if self.videoOutput == nil {
            self.videoOutput = AVPlayerItemVideoOutput(pixelBufferAttributes: nil)
            playerItem.remove(self.videoOutput!)
            playerItem.add(self.videoOutput!)
        }
        
        guard let videoOutput = self.videoOutput else {
            return nil
        }
        
        let time = videoOutput.itemTime(forHostTime: CACurrentMediaTime())
        if videoOutput.hasNewPixelBuffer(forItemTime: time) {
            let lastSnapshotPixelBuffer = videoOutput.copyPixelBuffer(forItemTime: time, itemTimeForDisplay: nil)
            if lastSnapshotPixelBuffer != nil {
                let ciImage = CIImage(cvPixelBuffer: lastSnapshotPixelBuffer!)
                let context = CIContext(options: nil)
                let rect = CGRect(x: CGFloat(0), y: CGFloat(0), width: CGFloat(CVPixelBufferGetWidth(lastSnapshotPixelBuffer!)), height: CGFloat(CVPixelBufferGetHeight(lastSnapshotPixelBuffer!)))
                let cgImage = context.createCGImage(ciImage, from: rect)
                if cgImage != nil {
                    return UIImage(cgImage: cgImage!)
                }
            }
        }
        return nil
    }

 

thx：

详细代码： https://github.com/easyui/EZPlayer/blob/master/EZPlayer/EZPlayer.swift

使用AVPlayer播放m3u8视频时，实现视频截图 http://blog.csdn.net/hherima/article/details/53576872

iOS 小坑记录：如何给 AVPlayer 截图http://darktechlabs.com/2016/07/15/iOS-%E5%B0%8F%E5%9D%91%E8%AE%B0%E5%BD%95%EF%BC%9A%E5%A6%82%E4%BD%95%E7%BB%99-AVPlayer-%E6%88%AA%E5%9B%BE/

 

iOS获取m3u8流媒体的视频截图http://www.jianshu.com/p/bd30ce34a76f

 

Real-time Video Processing Using AVPlayerItemVideoOutput https://developer.apple.com/library/content/samplecode/AVBasicVideoOutput/Introduction/Intro.html

• Real-timeVideoProcessingUsingAVPlayerItemVideoOutput.zip (69.2 KB)
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