このコードは、以前は iOS9 でビデオに透かしとテキストを追加するために機能していましたが、iOS10 以降では機能しなくなりました。提出されたiOS 10 のバグがありますが、Apple からの回答はありません。ビデオに透かしとテキストを追加するための回避策を実装できませんでした。このコードを使用すると、ビデオが正常にエクスポートされる場合もありますが、ほとんどの場合、エクスポートされません。
AVVideoCompositionCoreAnimationTooliOS9と同じよう に使うにはどうすればいいですか？
let videoComposition: AVMutableVideoComposition = AVMutableVideoComposition()
videoComposition.frameDuration = CMTimeMake(1, 60)
videoComposition.renderSize = CGSize(width: clipVideoTrack.naturalSize.height, height: clipVideoTrack.naturalSize.height)
let instruction: AVMutableVideoCompositionInstruction = AVMutableVideoCompositionInstruction()
instruction.timeRange = CMTimeRangeMake(kCMTimeZero, CMTimeMakeWithSeconds(60, 30))
// transformer is applied to set the video in portrait otherwise it is rotated by 90 degrees
let transformer: AVMutableVideoCompositionLayerInstruction =
AVMutableVideoCompositionLayerInstruction(assetTrack: clipVideoTrack)
let t1: CGAffineTransform = CGAffineTransform(translationX: clipVideoTrack.naturalSize.height, y: -(clipVideoTrack.naturalSize.width - clipVideoTrack.naturalSize.height)/2)
let t2: CGAffineTransform = t1.rotated(by: CGFloat(M_PI_2))
var finalTransform: CGAffineTransform = t2
transformer.setTransform(finalTransform, at: kCMTimeZero)
instruction.layerInstructions = NSArray(object: transformer) as! [AVVideoCompositionLayerInstruction]
videoComposition.instructions = NSArray(object: instruction) as! [AVVideoCompositionInstructionProtocol]
let mixComposition = AVMutableComposition()
let compositionVideoTrack = mixComposition.addMutableTrack(withMediaType: AVMediaTypeVideo, preferredTrackID: kCMPersistentTrackID_Invalid)
do {
try compositionVideoTrack.insertTimeRange(CMTimeRangeMake(kCMTimeZero, asset.duration), of: clipVideoTrack, at: kCMTimeZero)
} catch {
print(error)
}
//Add watermark
let myImage = UIImage(named: "logo")
let aLayer = CALayer()
aLayer.contents = myImage!.cgImage
aLayer.frame = CGRect(x: (clipVideoTrack.naturalSize.height*(self.view.bounds.width-45))/self.view.bounds.width, y: (clipVideoTrack.naturalSize.height*(self.view.bounds.width-40))/self.view.bounds.width, width: (clipVideoTrack.naturalSize.height*40)/self.view.bounds.width, height: (clipVideoTrack.naturalSize.height*40)/self.view.bounds.width)
let titleLayer = CATextLayer()
titleLayer.string = "text"
titleLayer.font = UIFont(name: "helvetica", size: 0)
titleLayer.fontSize = clipVideoTrack.naturalSize.height/16
titleLayer.shadowOpacity = 0.5
titleLayer.alignmentMode = kCAAlignmentCenter
titleLayer.frame = CGRect(x: 0, y: 0, width: clipVideoTrack.naturalSize.height, height: clipVideoTrack.naturalSize.height/6)
titleLayer.display()
let videoSize = asset.tracks(withMediaType: AVMediaTypeVideo)[0].naturalSize
let parentLayer = CALayer()
let videoLayer = CALayer()
parentLayer.frame = CGRect(x: 0, y: 0, width: videoSize.height, height: videoSize.height)
videoLayer.frame = CGRect(x: 0, y: 0, width: videoSize.height, height: videoSize.height)
parentLayer.addSublayer(videoLayer)
parentLayer.addSublayer(aLayer)
parentLayer.addSublayer(titleLayer)
videoComposition.animationTool = AVVideoCompositionCoreAnimationTool(postProcessingAsVideoLayer: videoLayer, in: parentLayer)
do { try FileManager.default.removeItem(at: filePath) }
catch let error as NSError {
NSLog("\(error), \(error.localizedDescription)")
}
var exportUrl: URL = filePath
self.videoUrl = filePath as NSURL
var exporter = AVAssetExportSession(asset: asset, presetName: AVAssetExportPresetMediumQuality)
exporter!.videoComposition = videoComposition
exporter!.outputFileType = AVFileTypeQuickTimeMovie
exporter!.outputURL = URL(fileURLWithPath: exportUrl.path)
exporter!.exportAsynchronously(completionHandler: {
DispatchQueue.main.async {
self.view.layer.addSublayer(self.avPlayerLayer)
let item = AVPlayerItem(url: exportUrl)
self.player.replaceCurrentItem(with: item)
if (self.player.currentItem != nil) {
print("Starting playback!")
self.player.play()
}
}
})
注意: 削除するAVVideoCompositionCoreAnimationToolと、ビデオは常にエクスポートされますが、ビデオに透かしやテキストは表示されません。AVVideoCompositionCoreAnimationToolと競合しないようにするにはどうすればよいAVAssetExportSessionですか？
プロトコルを使用した回避策が実装されているものもcustomVideoCompositorClassありAVVideoCompositingますが、これは以前の動作に比べて重い回避策のようです。