Hello,
I need to create an app that can edit and export a merged data display with an image or video as an option. Do you know of a tutorial? If not what is the most basic code to edit text with image or video and export it to photos?
If you can point me to a tutorial that would be fine.
Hello @Chris_Parker,
So I have this code that is supposed to save video. I am getting an error saying that it’s getting “Bad Instructions”. Could you assist please:
import UIKit
import AVFoundation
import AVKit
import Photos
class ViewController: UIViewController {
var myurl: URL?
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
@IBAction func saveVideoTapper(_ sender: Any) {
let path = Bundle.main.path(forResource: "sample_video", ofType:"mov")
let fileURL = NSURL(fileURLWithPath: path!)
let composition = AVMutableComposition()
let vidAsset = AVURLAsset(url: fileURL as URL, options: nil)
// get video track
let vtrack = vidAsset.tracks(withMediaType: AVMediaType.video)
let videoTrack: AVAssetTrack = vtrack[0]
let vid_timerange = CMTimeRangeMake(start: CMTime.zero, duration: vidAsset.duration)
let tr: CMTimeRange = CMTimeRange(start: CMTime.zero, duration: CMTime(seconds: 10.0, preferredTimescale: 600))
composition.insertEmptyTimeRange(tr)
let trackID:CMPersistentTrackID = CMPersistentTrackID(kCMPersistentTrackID_Invalid)
if let compositionvideoTrack: AVMutableCompositionTrack = composition.addMutableTrack(withMediaType: AVMediaType.video, preferredTrackID: trackID) {
do {
try compositionvideoTrack.insertTimeRange(vid_timerange, of: videoTrack, at: CMTime.zero)
} catch {
print("error")
}
compositionvideoTrack.preferredTransform = videoTrack.preferredTransform
} else {
print("unable to add video track")
return
}
// Watermark Effect
let size = videoTrack.naturalSize
let imglogo = UIImage(named: "image.png")
let imglayer = CALayer()
imglayer.contents = imglogo?.cgImage
imglayer.frame = CGRect(x: 5, y: 5, width: 100, height: 100)
imglayer.opacity = 0.6
// create text Layer
let titleLayer = CATextLayer()
titleLayer.backgroundColor = UIColor.white.cgColor
titleLayer.string = "Dummy text"
titleLayer.font = UIFont(name: "Helvetica", size: 28)
titleLayer.shadowOpacity = 0.5
titleLayer.alignmentMode = CATextLayerAlignmentMode.center
titleLayer.frame = CGRect(x: 0, y: 50, width: size.width, height: size.height / 6)
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)
parentlayer.addSublayer(imglayer)
parentlayer.addSublayer(titleLayer)
let layercomposition = AVMutableVideoComposition()
layercomposition.frameDuration = CMTimeMake(value: 1, timescale: 30)
layercomposition.renderSize = size
layercomposition.animationTool = AVVideoCompositionCoreAnimationTool(postProcessingAsVideoLayer: videolayer, in: parentlayer)
// instruction for watermark
let instruction = AVMutableVideoCompositionInstruction()
instruction.timeRange = CMTimeRangeMake(start: CMTime.zero, duration: composition.duration)
let videotrack = composition.tracks(withMediaType: AVMediaType.video)[0] as AVAssetTrack
let layerinstruction = AVMutableVideoCompositionLayerInstruction(assetTrack: videotrack)
instruction.layerInstructions = NSArray(object: layerinstruction) as [AnyObject] as! [AVVideoCompositionLayerInstruction]
layercomposition.instructions = NSArray(object: instruction) as [AnyObject] as! [AVVideoCompositionInstructionProtocol]
// create new file to receive data
let dirPaths = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)
let docsDir = dirPaths[0] as NSString
let movieFilePath = docsDir.appendingPathComponent("result.mov")
let movieDestinationUrl = NSURL(fileURLWithPath: movieFilePath)
// use AVAssetExportSession to export video
let assetExport = AVAssetExportSession(asset: composition, presetName:AVAssetExportPresetHighestQuality)
assetExport?.outputFileType = AVFileType.mov
assetExport?.videoComposition = layercomposition
// Check exist and remove old file
FileManager.default.removeItemIfExisted(movieDestinationUrl as URL)
assetExport?.outputURL = movieDestinationUrl as URL
assetExport?.exportAsynchronously(completionHandler: {
switch assetExport!.status {
case AVAssetExportSession.Status.failed:
print("failed")
print(assetExport?.error ?? "unknown error")
case AVAssetExportSession.Status.cancelled:
print("cancelled")
print(assetExport?.error ?? "unknown error")
default:
print("Movie complete")
self.myurl = movieDestinationUrl as URL
PHPhotoLibrary.shared().performChanges({
PHAssetChangeRequest.creationRequestForAssetFromVideo(atFileURL: movieDestinationUrl as URL)
}) { saved, error in
if saved {
print("Saved")
}
}
self.playVideo()
}
})
}
func playVideo() {
let player = AVPlayer(url: myurl!)
let playerLayer = AVPlayerLayer(player: player)
playerLayer.frame = self.view.bounds
self.view.layer.addSublayer(playerLayer)
player.play()
print("playing...")
}
}
extension FileManager {
func removeItemIfExisted(_ url:URL) -> Void {
if FileManager.default.fileExists(atPath: url.path) {
do {
try FileManager.default.removeItem(atPath: url.path)
}
catch {
print("Failed to delete file")
}
}
}
}
Hi Gilbert,
I have no experience with custom video so the best thing to do is search on line for a tutorial that may help.
Sorry.