Swift AVasset-Videos-Array zusammenführen
Ich möchte das AVAsset- @ zusammenführarrayVideos
in ein einzelnes Video und speichern Sie es auf der Kamerarolle. Raywenderlich.com hat ein tollesLernprogram wo zwei Videos zu einem zusammengeführt werden. Ich habe den folgenden Code erstellt, aber das Video, das ich nach dem Exportieren in die Kamerarolle erhalte, enthält nur das erste und das letzte Video aus dem Array (mit Ausnahme der übrigen Videos in der Mitte vonarrayVideos
). Vermisse ich hier etwas?
var arrayVideos = [AVAsset]() //Videos Array
var atTimeM: CMTime = CMTimeMake(0, 0)
var lastAsset: AVAsset!
var layerInstructionsArray = [AVVideoCompositionLayerInstruction]()
var completeTrackDuration: CMTime = CMTimeMake(0, 1)
var videoSize: CGSize = CGSize(width: 0.0, height: 0.0)
func mergeVideoArray(){
let mixComposition = AVMutableComposition()
for videoAsset in arrayVideos{
let videoTrack = mixComposition.addMutableTrack(withMediaType: AVMediaTypeVideo, preferredTrackID: Int32(kCMPersistentTrackID_Invalid))
do {
if videoAsset == arrayVideos.first{
atTimeM = kCMTimeZero
} else{
atTimeM = lastAsset!.duration
}
try videoTrack.insertTimeRange(CMTimeRangeMake(kCMTimeZero, videoAsset.duration), of: videoAsset.tracks(withMediaType: AVMediaTypeVideo)[0], at: atTimeM)
videoSize = videoTrack.naturalSize
} catch let error as NSError {
print("error: \(error)")
}
completeTrackDuration = CMTimeAdd(completeTrackDuration, videoAsset.duration)
let videoInstruction = AVMutableVideoCompositionLayerInstruction(assetTrack: videoTrack)
if videoAsset != arrayVideos.last{
videoInstruction.setOpacity(0.0, at: videoAsset.duration)
}
layerInstructionsArray.append(videoInstruction)
lastAsset = videoAsset
}
let mainInstruction = AVMutableVideoCompositionInstruction()
mainInstruction.timeRange = CMTimeRangeMake(kCMTimeZero, completeTrackDuration)
mainInstruction.layerInstructions = layerInstructionsArray
let mainComposition = AVMutableVideoComposition()
mainComposition.instructions = [mainInstruction]
mainComposition.frameDuration = CMTimeMake(1, 30)
mainComposition.renderSize = CGSize(width: videoSize.width, height: videoSize.height)
let documentDirectory = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0]
let dateFormatter = DateFormatter()
dateFormatter.dateStyle = .long
dateFormatter.timeStyle = .short
let date = dateFormatter.string(from: NSDate() as Date)
let savePath = (documentDirectory as NSString).appendingPathComponent("mergeVideo-\(date).mov")
let url = NSURL(fileURLWithPath: savePath)
let exporter = AVAssetExportSession(asset: mixComposition, presetName: AVAssetExportPresetHighestQuality)
exporter!.outputURL = url as URL
exporter!.outputFileType = AVFileTypeQuickTimeMovie
exporter!.shouldOptimizeForNetworkUse = true
exporter!.videoComposition = mainComposition
exporter!.exportAsynchronously {
PHPhotoLibrary.shared().performChanges({
PHAssetChangeRequest.creationRequestForAssetFromVideo(atFileURL: exporter!.outputURL!)
}) { saved, error in
if saved {
let alertController = UIAlertController(title: "Your video was successfully saved", message: nil, preferredStyle: .alert)
let defaultAction = UIAlertAction(title: "OK", style: .default, handler: nil)
alertController.addAction(defaultAction)
self.present(alertController, animated: true, completion: nil)
} else{
print("video erro: \(error)")
}
}
}
}