i'm trying to do some animations to a video (after recording) and then export it. but before any animation i had the problem with the orientation which became landscape (without export it was portrait) and it is solved not but now i have problem with making it full screen.in iphone 6,7 plus its full screen how ever in ipad it is not.
here is my method :
func export(_ url : URL) { let composition = AVMutableComposition() let asset = AVURLAsset(url: url, options: nil) let track = asset.tracks(withMediaType : AVMediaTypeVideo) let videoTrack:AVAssetTrack = track[0] as AVAssetTrack let timerange = CMTimeRangeMake(kCMTimeZero, asset.duration) let compositionVideoTrack:AVMutableCompositionTrack = composition.addMutableTrack(withMediaType: AVMediaTypeVideo, preferredTrackID: CMPersistentTrackID()) do { try compositionVideoTrack.insertTimeRange(timerange, of: videoTrack, at: kCMTimeZero) } catch { print(error) } let compositionAudioTrack:AVMutableCompositionTrack = composition.addMutableTrack(withMediaType: AVMediaTypeAudio, preferredTrackID: CMPersistentTrackID()) for audioTrack in asset.tracks(withMediaType: AVMediaTypeAudio) { do { try compositionAudioTrack.insertTimeRange(audioTrack.timeRange, of: audioTrack, at: kCMTimeZero) } catch { print(error) } } let size = self.view.bounds.size let videolayer = CALayer() videolayer.frame = CGRect(x: 0, y: 0, width: size.width, height: size.height) let parentlayer = CALayer() parentlayer.frame = CGRect(x: 0, y: 0, width: size.width, height: size.height) parentlayer.addSublayer(videolayer) let layercomposition = AVMutableVideoComposition() layercomposition.frameDuration = CMTimeMake(1, 30) layercomposition.renderSize = self.view.bounds.size layercomposition.animationTool = AVVideoCompositionCoreAnimationTool(postProcessingAsVideoLayer: videolayer, in: parentlayer) let instruction = AVMutableVideoCompositionInstruction() instruction.timeRange = CMTimeRangeMake(kCMTimeZero, asset.duration) let videotrack = composition.tracks(withMediaType: AVMediaTypeVideo)[0] as AVAssetTrack let layerinstruction = AVMutableVideoCompositionLayerInstruction(assetTrack: videotrack) let ratio = size.height / videoTrack.naturalSize.width composition.naturalSize = videoTrack.naturalSize layerinstruction.setTransform(videoTrack.preferredTransform.scaledBy(x: 0.645 , y: ratio).translatedBy(x: self.view.bounds.height, y: 0), at: kCMTimeZero) instruction.layerInstructions = [layerinstruction] layercomposition.instructions = [instruction] let filePath = self.fileName() let movieUrl = URL(fileURLWithPath: filePath) guard let assetExport = AVAssetExportSession(asset: composition, presetName:AVAssetExportPresetHighestQuality) else {return} assetExport.videoComposition = layercomposition assetExport.outputFileType = AVFileTypeMPEG4 assetExport.outputURL = movieUrl assetExport.exportAsynchronously(completionHandler: { switch assetExport.status { case .completed: print("success") let player = AVPlayer(url: movieUrl) let playerViewController = AVPlayerViewController() playerViewController.player = player self.present(playerViewController, animated: true) { playerViewController.player!.play() } break case .cancelled: print("cancelled") break case .exporting: print("exporting") break case .failed: print("failed: \(String(describing: assetExport.error))") break case .unknown: print("unknown") break case .waiting: print("waiting") break } }) } 1 Answers
Answers 1
what fixed my problem was changing the scale factor and the translated amount. here is the code below :
let size = self.view.bounds.size let trackTransform = videoTrack.preferredTransform let xScale = size.height / videoTrack.naturalSize.width let yScale = size.width / videoTrack.naturalSize.height let exportTransform = videoTrack.preferredTransform.translatedBy(x: trackTransform.ty * -1 , y: 0).scaledBy(x: xScale , y: yScale) 
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