Question or problem with Swift language programming:
I am creating a app in which i need to record videos and upload it to a server. Now my project has a android version too. To support android version i have to record the videos in mp4 format. I followed this tutorial to set the UIImagePicker media type to movie format imagePicker.mediaTypes = [kUTTypeMovie as String]
The UIImagePickerController is perfect for my requirement and the only thing that i need to change is its saving format to mp4. I tried kUTTypeMPEG4 in mediaTypes but it throws error at the run time with no error description.
This is my video Capture function
func startCameraFromViewController() {
if UIImagePickerController.isSourceTypeAvailable(.Camera) == false {
return
}
viewBlack.hidden = false
presentViewController(cameraController, animated: false, completion: nil)
cameraController.sourceType = .Camera
cameraController.mediaTypes = [kUTTypeMovie as String]
//cameraController.mediaTypes = [kUTTypeMPEG4 as String]
cameraController.cameraCaptureMode = .Video
cameraController.videoQuality = .TypeMedium
if(getPurchaseId() as! Int == 0)
{
if(txtBenchMark.text?.isEmpty == false)
{
cameraController.videoMaximumDuration = NSTimeInterval(300.0)
}else{
cameraController.videoMaximumDuration = NSTimeInterval(60.0)
}
}else{
cameraController.videoMaximumDuration = NSTimeInterval(600.0)
}
cameraController.allowsEditing = false
}
I am using Swift 2.2 and Xcode 8 with Use Legacy swift Language version = Yes
Any Alternative Solutions are also appreciated. Thanks in advance.
EDIT:
I found out that there is no method to directly record videos in mp4 format in swift. only can be converted to required format from apple’s quicktime mov format.
How to solve the problem:
Solution 1:
Here is some code that you can use to convert the recorded video into MP4:
func encodeVideo(videoURL: NSURL) {
let avAsset = AVURLAsset(URL: videoURL, options: nil)
var startDate = NSDate()
//Create Export session
exportSession = AVAssetExportSession(asset: avAsset, presetName: AVAssetExportPresetPassthrough)
// exportSession = AVAssetExportSession(asset: composition, presetName: mp4Quality)
//Creating temp path to save the converted video
let documentsDirectory = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0]
let myDocumentPath = NSURL(fileURLWithPath: documentsDirectory).URLByAppendingPathComponent("temp.mp4").absoluteString
let url = NSURL(fileURLWithPath: myDocumentPath)
let documentsDirectory2 = NSFileManager.defaultManager().URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask)[0] as NSURL
let filePath = documentsDirectory2.URLByAppendingPathComponent("rendered-Video.mp4")
deleteFile(filePath)
//Check if the file already exists then remove the previous file
if NSFileManager.defaultManager().fileExistsAtPath(myDocumentPath) {
do {
try NSFileManager.defaultManager().removeItemAtPath(myDocumentPath)
}
catch let error {
print(error)
}
}
url
exportSession!.outputURL = filePath
exportSession!.outputFileType = AVFileTypeMPEG4
exportSession!.shouldOptimizeForNetworkUse = true
var start = CMTimeMakeWithSeconds(0.0, 0)
var range = CMTimeRangeMake(start, avAsset.duration)
exportSession.timeRange = range
exportSession!.exportAsynchronouslyWithCompletionHandler({() -> Void in
switch self.exportSession!.status {
case .Failed:
print("%@",self.exportSession?.error)
case .Cancelled:
print("Export canceled")
case .Completed:
//Video conversion finished
var endDate = NSDate()
var time = endDate.timeIntervalSinceDate(startDate)
print(time)
print("Successful!")
print(self.exportSession.outputURL)
default:
break
}
})
}
func deleteFile(filePath:NSURL) {
guard NSFileManager.defaultManager().fileExistsAtPath(filePath.path!) else {
return
}
do {
try NSFileManager.defaultManager().removeItemAtPath(filePath.path!)
}catch{
fatalError("Unable to delete file: \(error) : \(__FUNCTION__).")
}
}
Source: https://stackoverflow.com/a/39329155/4786204
Solution 2:
I made some modifications to the following 2 answers to make it compatible with Swift3:
https://stackoverflow.com/a/40354948/2470084
https://stackoverflow.com/a/39329155/2470084
import AVFoundation
func encodeVideo(videoURL: URL){
let avAsset = AVURLAsset(url: videoURL)
let startDate = Date()
let exportSession = AVAssetExportSession(asset: avAsset, presetName: AVAssetExportPresetPassthrough)
let docDir = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0]
let myDocPath = NSURL(fileURLWithPath: docDir).appendingPathComponent("temp.mp4")?.absoluteString
let docDir2 = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0] as NSURL
let filePath = docDir2.appendingPathComponent("rendered-Video.mp4")
deleteFile(filePath!)
if FileManager.default.fileExists(atPath: myDocPath!){
do{
try FileManager.default.removeItem(atPath: myDocPath!)
}catch let error{
print(error)
}
}
exportSession?.outputURL = filePath
exportSession?.outputFileType = AVFileTypeMPEG4
exportSession?.shouldOptimizeForNetworkUse = true
let start = CMTimeMakeWithSeconds(0.0, 0)
let range = CMTimeRange(start: start, duration: avAsset.duration)
exportSession?.timeRange = range
exportSession!.exportAsynchronously{() -> Void in
switch exportSession!.status{
case .failed:
print("\(exportSession!.error!)")
case .cancelled:
print("Export cancelled")
case .completed:
let endDate = Date()
let time = endDate.timeIntervalSince(startDate)
print(time)
print("Successful")
print(exportSession?.outputURL ?? "")
default:
break
}
}
}
func deleteFile(_ filePath:URL) {
guard FileManager.default.fileExists(atPath: filePath.path) else{
return
}
do {
try FileManager.default.removeItem(atPath: filePath.path)
}catch{
fatalError("Unable to delete file: \(error) : \(#function).")
}
}
Solution 3:
A quick swift 4 update to the previous answers:
func encodeVideo(videoUrl: URL, outputUrl: URL? = nil, resultClosure: @escaping (URL?) -> Void ) {
var finalOutputUrl: URL? = outputUrl
if finalOutputUrl == nil {
var url = videoUrl
url.deletePathExtension()
url.appendPathExtension(".mp4")
finalOutputUrl = url
}
if FileManager.default.fileExists(atPath: finalOutputUrl!.path) {
print("Converted file already exists \(finalOutputUrl!.path)")
resultClosure(finalOutputUrl)
return
}
let asset = AVURLAsset(url: videoUrl)
if let exportSession = AVAssetExportSession(asset: asset, presetName: AVAssetExportPresetPassthrough) {
exportSession.outputURL = finalOutputUrl!
exportSession.outputFileType = AVFileType.mp4
let start = CMTimeMakeWithSeconds(0.0, 0)
let range = CMTimeRangeMake(start, asset.duration)
exportSession.timeRange = range
exportSession.shouldOptimizeForNetworkUse = true
exportSession.exportAsynchronously() {
switch exportSession.status {
case .failed:
print("Export failed: \(exportSession.error != nil ? exportSession.error!.localizedDescription : "No Error Info")")
case .cancelled:
print("Export canceled")
case .completed:
resultClosure(finalOutputUrl!)
default:
break
}
}
} else {
resultClosure(nil)
}
}
Solution 4:
Swift 5.2 Update Solution
// Don't forget to import AVKit
func encodeVideo(at videoURL: URL, completionHandler: ((URL?, Error?) -> Void)?) {
let avAsset = AVURLAsset(url: videoURL, options: nil)
let startDate = Date()
//Create Export session
guard let exportSession = AVAssetExportSession(asset: avAsset, presetName: AVAssetExportPresetPassthrough) else {
completionHandler?(nil, nil)
return
}
//Creating temp path to save the converted video
let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0] as URL
let filePath = documentsDirectory.appendingPathComponent("rendered-Video.mp4")
//Check if the file already exists then remove the previous file
if FileManager.default.fileExists(atPath: filePath.path) {
do {
try FileManager.default.removeItem(at: filePath)
} catch {
completionHandler?(nil, error)
}
}
exportSession.outputURL = filePath
exportSession.outputFileType = AVFileType.mp4
exportSession.shouldOptimizeForNetworkUse = true
let start = CMTimeMakeWithSeconds(0.0, preferredTimescale: 0)
let range = CMTimeRangeMake(start: start, duration: avAsset.duration)
exportSession.timeRange = range
exportSession.exportAsynchronously(completionHandler: {() -> Void in
switch exportSession.status {
case .failed:
print(exportSession.error ?? "NO ERROR")
completionHandler?(nil, exportSession.error)
case .cancelled:
print("Export canceled")
completionHandler?(nil, nil)
case .completed:
//Video conversion finished
let endDate = Date()
let time = endDate.timeIntervalSince(startDate)
print(time)
print("Successful!")
print(exportSession.outputURL ?? "NO OUTPUT URL")
completionHandler?(exportSession.outputURL, nil)
default: break
}
})
}
Solution 5:
Minor refactoring of previous examples:
import AVFoundation
extension AVURLAsset {
func exportVideo(presetName: String = AVAssetExportPresetHighestQuality,
outputFileType: AVFileType = .mp4,
fileExtension: String = "mp4",
then completion: @escaping (URL?) -> Void)
{
let filename = url.deletingPathExtension().appendingPathExtension(fileExtension).lastPathComponent
let outputURL = FileManager.default.temporaryDirectory.appendingPathComponent(filename)
if let session = AVAssetExportSession(asset: self, presetName: presetName) {
session.outputURL = outputURL
session.outputFileType = outputFileType
let start = CMTimeMakeWithSeconds(0.0, 0)
let range = CMTimeRangeMake(start, duration)
session.timeRange = range
session.shouldOptimizeForNetworkUse = true
session.exportAsynchronously {
switch session.status {
case .completed:
completion(outputURL)
case .cancelled:
debugPrint("Video export cancelled.")
completion(nil)
case .failed:
let errorMessage = session.error?.localizedDescription ?? "n/a"
debugPrint("Video export failed with error: \(errorMessage)")
completion(nil)
default:
break
}
}
} else {
completion(nil)
}
}
}
Also: AVAssetExportPresetHighestQuality preset works when video is played on Android / Chrome.
P.S. Be aware that the completion handler of exportVideo method might not be returned on the main thread.
