実行
補足
映像と音声は別々に合成しています。スタートポイントだけしかまだ実装してないです。エンドポイントを動かしてもスタートポイントの位置が変わります。エンドポイントはスタトート地点から５０秒後に設定しています。viewには動画からサムネイルを生成しています。スライダーを動かすたびにviewに描画されたサムネイル画像が変動するのは、スライダーを動かすたびに、スライダーから取得した秒数で新たにサムネイルを生成してviewに描画しているからです。
ソース
実装
import UIKit
import AVFoundation
import MobileCoreServices
import Photos
import AVKit
var int = 0
var trimVideoURL: URL?
var asset : AVAsset?
class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
let imagePickerController = UIImagePickerController()
var videoURL: URL?
@IBOutlet weak var imageView: UIImageView!
@IBAction func selectImage(_ sender: Any) {
print("UIBarButtonItem。カメラロールから動画を選択")
imagePickerController.sourceType = .photoLibrary
imagePickerController.delegate = self
//imagePickerController.mediaTypes = ["public.image", "public.movie"]
//動画だけ
imagePickerController.mediaTypes = ["public.movie"]
//画像だけ
//imagePickerController.mediaTypes = ["public.image"]
present(imagePickerController, animated: true, completion: nil)
}
override func viewDidLoad() {
super.viewDidLoad()
// 一つめのスライダー
let startPointSlider = UISlider(frame: CGRect(x:0, y:0, width:350, height:30))
startPointSlider.layer.position = CGPoint(x:self.view.frame.midX, y:500)
startPointSlider.backgroundColor = UIColor.white
startPointSlider.layer.cornerRadius = 10.0
startPointSlider.layer.shadowOpacity = 0.5
startPointSlider.layer.masksToBounds = false
startPointSlider.addTarget(self, action: #selector(self.onStartPointlabel(_:)), for: .valueChanged)
// 最小値と最大値を設定する.
startPointSlider.minimumValue = 0
startPointSlider.maximumValue = 100
self.view.addSubview(startPointSlider)
//一つめのラベル
let startPointlabel = UILabel()
startPointlabel.text = "start point"
startPointlabel.sizeToFit()
startPointlabel.layer.position = CGPoint(x:self.view.frame.midX, y:450)
self.view.addSubview(startPointlabel)
// 二つめのスライダー
let endPointSlider = UISlider(frame: CGRect(x:0, y:0, width:350, height:30))
endPointSlider.layer.position = CGPoint(x:self.view.frame.midX, y:600)
endPointSlider.backgroundColor = UIColor.white
endPointSlider.layer.cornerRadius = 10.0
endPointSlider.layer.shadowOpacity = 0.5
endPointSlider.layer.masksToBounds = false
endPointSlider.addTarget(self, action: #selector(self.onEndPointlabel(_:)), for: .valueChanged)
// 最小値と最大値を設定する.
endPointSlider.minimumValue = 0
endPointSlider.maximumValue = 100
self.view.addSubview(endPointSlider)
//二つめのラベル
let endPointlabel = UILabel()
endPointlabel.text = "end point"
endPointlabel.sizeToFit()
endPointlabel.layer.position = CGPoint(x:self.view.frame.midX, y:550)
self.view.addSubview(endPointlabel)
}
/*
Sliderの値が変わった時に呼ばれるメソッド
*/
func onStartPointlabel(_ sender:UISlider!)
{
print(floor(sender.value))
int = Int(floor(sender.value))
imageView.image = previewImageFromVideo(videoURL!)!
}
func onEndPointlabel(_ sender:UISlider!)
{
print(floor(sender.value))
int = Int(floor(sender.value))
imageView.image = previewImageFromVideo(videoURL!)!
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
videoURL = info["UIImagePickerControllerReferenceURL"] as? URL
trimVideoURL = (info["UIImagePickerControllerReferenceURL"] as? URL)!
print(videoURL!)
print(videoURL!)
imageView.image = previewImageFromVideo(videoURL!)!
imageView.contentMode = .scaleAspectFit
imagePickerController.dismiss(animated: true, completion: nil)
}
func previewImageFromVideo(_ url:URL) -> UIImage? {
print("動画からサムネイルを生成する")
asset = AVAsset(url:url)
let imageGenerator = AVAssetImageGenerator(asset:asset!)
imageGenerator.appliesPreferredTrackTransform = true
var time = asset?.duration
time?.value = min(30,32)
do {
let imageRef = try imageGenerator.copyCGImage(at: CMTimeMake(Int64(int), 1), actualTime: nil)
return UIImage(cgImage: imageRef)
} catch {
return nil
}
}
//動画トリミング
func createAudioFileFromAsset(_ asset: AVAsset){
let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0] as URL
let filePath = documentsDirectory.appendingPathComponent("rendered-audio.m4v")
if let exportSession = AVAssetExportSession(asset: asset, presetName: AVAssetExportPreset640x480){
exportSession.canPerformMultiplePassesOverSourceMediaData = true
exportSession.outputURL = filePath
exportSession.timeRange = CMTimeRangeMake(kCMTimeZero, asset.duration)
exportSession.outputFileType = AVFileTypeQuickTimeMovie
exportSession.exportAsynchronously {
_ in
print("finished: \(filePath) : \(exportSession.status.rawValue) ")
}
}
}
@IBAction func trim(_ sender: Any) {
let url = trimVideoURL
let videoAsset = AVURLAsset(url: url!)
print("videoAssetする")
print(videoAsset)
print( type(of: videoAsset) )
let comp = AVMutableComposition()
let videoAssetSourceTrack = videoAsset.tracks(withMediaType: AVMediaTypeVideo).first! as AVAssetTrack
let videoCompositionTrack = comp.addMutableTrack(withMediaType: AVMediaTypeVideo, preferredTrackID: kCMPersistentTrackID_Invalid)
let audioAssetSourceTrack1 = videoAsset.tracks(withMediaType: AVMediaTypeAudio).first! as AVAssetTrack
let audioCompositionTrack = comp.addMutableTrack(withMediaType: AVMediaTypeAudio, preferredTrackID: kCMPersistentTrackID_Invalid)
do {
try videoCompositionTrack.insertTimeRange(
CMTimeRangeMake(CMTimeMakeWithSeconds(Float64(int), 10), CMTimeMakeWithSeconds(50, 10)),
of: videoAssetSourceTrack,
at: kCMTimeZero)
try audioCompositionTrack.insertTimeRange(
CMTimeRangeMake(CMTimeMakeWithSeconds(Float64(int), 10), CMTimeMakeWithSeconds(50, 10)),
of: audioAssetSourceTrack1,
at: kCMTimeZero)
}catch { print(error) }
asset = comp
createAudioFileFromAsset(asset!)
}
}