Erstellen Sie ein Video mit AVVideoCompositionCoreAnimationTool und AVAssetExportSession SLOW

Question

Ich erstelle eine Animation mit Ebenen und möchte ein Video mit diesen Animationen exportieren. Also verwende ich AVAssetExportSession, aber es dauert sehr lange zu exportieren.

Vielleicht kann ich eine andere Sache verwenden? Ich brauche wirklich Hilfe!

let videoURL = NSURL.init(fileURLWithPath: "/Users/Downloads/img_2040.mp4") 
    let audioURL = NSURL.init(fileURLWithPath: "/Users/Downloads/music_10sm.m4a") 

    let videoAsset = AVURLAsset.init(url: videoURL as URL) 
    let audioAsset = AVURLAsset.init(url: audioURL as URL) 

    let mixComposition = AVMutableComposition.init() 
    let compositionVideoTrack = mixComposition.addMutableTrack(withMediaType: AVMediaTypeVideo, preferredTrackID: kCMPersistentTrackID_Invalid) 
    // let mixCompositionAudio = AVMutableComposition.init() 
    let compositionAudioTrack = mixComposition.addMutableTrack(withMediaType: AVMediaTypeAudio, preferredTrackID: kCMPersistentTrackID_Invalid) 
    // AVAssetTrack video of originalVideo 
    let originalVideoAsset = videoAsset.tracks(withMediaType: AVMediaTypeVideo).first 
    let originalAudioAsset = audioAsset.tracks(withMediaType: AVMediaTypeAudio).first 

    do { 
     try compositionVideoTrack.insertTimeRange(CMTimeRangeMake(kCMTimeZero, videoAsset.duration), of: originalVideoAsset!, at: kCMTimeZero) 
     compositionVideoTrack.preferredTransform = (videoAsset.tracks(withMediaType: AVMediaTypeVideo).first?.preferredTransform)! 

     try compositionAudioTrack.insertTimeRange(CMTimeRangeMake(kCMTimeZero, audioAsset.duration), of: originalAudioAsset!, at: kCMTimeZero) 
     compositionAudioTrack.preferredTransform = (audioAsset.tracks(withMediaType: AVMediaTypeAudio).first?.preferredTransform)! 

     let videoSize = originalVideoAsset?.naturalSize 
     let parentLayer = CALayer() 
     let videoLayer = CALayer() 
     parentLayer.bounds = CGRect(x: 0, y: 0, width: (videoSize?.width)!, height: (videoSize?.height)!) 
     parentLayer.position = CGPoint(x: (videoSize?.width)!/2, y: (videoSize?.height)!/2) 
     videoLayer.bounds = CGRect(x: 0, y: 0, width: (videoSize?.width)!, height: (videoSize?.height)!) 
     videoLayer.position = CGPoint(x: (videoSize?.width)!/2 + 20, y: (videoSize?.height)!/2) 
     let layerTest = CALayer() 
     layerTest.bounds = CGRect(x: 0, y: 0, width: 100, height: 100) 
     layerTest.backgroundColor = UIColor.green.cgColor 

     parentLayer.addSublayer(videoLayer) 
     parentLayer.insertSublayer(layerTest, below: videoLayer) 

     // My layer with animations 
     let cubeLayer = cubeAnimation(videoSize: containerLayer.frame.size, isVideo: true) 
     containerLayer.addSublayer(cubeLayer) 

     parentLayer.addSublayer(containerLayer) 
     parentLayer.isGeometryFlipped = true 

     let videoComposition = AVMutableVideoComposition.init() 
     videoComposition.renderSize = videoSize! 
     videoComposition.frameDuration = CMTimeMake(1, 30) 
     videoComposition.animationTool = AVVideoCompositionCoreAnimationTool.init(postProcessingAsVideoLayer: videoLayer, in: parentLayer) 

     // Instruction 
     let instruction = AVMutableVideoCompositionInstruction.init() 
     instruction.timeRange = CMTimeRangeMake(kCMTimeZero, mixComposition.duration) // TEST CAMBIAR ESTA DURATION 
     // Video 
     let videoTrack = mixComposition.tracks(withMediaType: AVMediaTypeVideo).first 
     let layerInstructions = AVMutableVideoCompositionLayerInstruction.init(assetTrack: videoTrack!) 

     instruction.layerInstructions = [layerInstructions] 
     videoComposition.instructions = [instruction] 

     let assetExport = AVAssetExportSession.init(asset: mixComposition, presetName: AVAssetExportPresetHighestQuality) 
     assetExport?.videoComposition = videoComposition 

     let exportPath = "/Users/CarolinaAitcin/Downloads/Test_ScrollBest91.mp4" 
     let exportUrl = URL.init(fileURLWithPath: exportPath) 

     assetExport?.outputFileType = AVFileTypeQuickTimeMovie 
     assetExport?.outputURL = exportUrl 
     assetExport?.shouldOptimizeForNetworkUse = true 

     assetExport?.exportAsynchronously { 
      print("Finish video") 
      print(NSDate()) 
     } 

     Timer.schedule(repeatInterval: 1, handler: { (runTime) in 
      let progress = assetExport?.progress 
      print(progress) 
     }) 
    } catch { 
     print("we have problem") 
    } 

Answer 1

Wenn ich den Export in einem Gerät testen, hat sich die Zeit stark verringert, ich brauche nur 20s. Im Simulator dauert fast 2,5 Minuten.