Converting iPhone video to mp4 and upload to PHP Server - ios

Question

I have an app that successfully records and uploads a file to my PHP server, unfortunately the file won't play. I received guidance that I needed to use AVAssetExportSession to convert the file to mp4 to get it to work but am having trouble incorporating this into my code correctly. I'm getting an error
Error Domain=AVFoundationErrorDomain Code=-11823 "Cannot Save"
UserInfo={NSLocalizedRecoverySuggestion=Try saving again.,
NSLocalizedDescription=Cannot Save, NSUnderlyingError=0x1d465ea50
{Error Domain=NSOSStatusErrorDomain Code=-12101 "(null)"}}
Here is my code:
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
print("Got a video")
if let pickedVideo:URL = (info[UIImagePickerControllerMediaURL] as? URL) {
// Save video to the main photo album
let selectorToCall = #selector(CameraVideoViewController.videoWasSavedSuccessfully(_:didFinishSavingWithError:context:))
UISaveVideoAtPathToSavedPhotosAlbum(pickedVideo.relativePath, self, selectorToCall, nil)
imageSelected = true
uuid = UUID().uuidString
if imageSelected == true {
saveFileName = "video-\(uuid).mp4"
}
// Save the video to the app directory so we can play it later
let videoData = try? Data(contentsOf: pickedVideo)
let paths = NSSearchPathForDirectoriesInDomains(
FileManager.SearchPathDirectory.documentDirectory, FileManager.SearchPathDomainMask.userDomainMask, true)
let documentsDirectory: URL = URL(fileURLWithPath: paths[0])
let dataPath = documentsDirectory.appendingPathComponent(saveFileName)
try! videoData?.write(to: dataPath, options: [])
print("Saved to " + dataPath.absoluteString)
imagePicker.dismiss(animated: true, completion: {
// Anything you want to happen when the user saves an video
self.encodeVideo(dataPath: dataPath)
self.uploadVideo(videoData!)
})
} }
// custom body of HTTP request to upload image file
func createBodyWithParams(_ parameters: [String: String]?, filePathKey: String?, videoData: Data, boundary: String) -> Data {
let body = NSMutableData();
if parameters != nil {
for (key, value) in parameters! {
body.appendString("--\(boundary)\r\n")
body.appendString("Content-Disposition: form-data; name=\"\(key)\"\r\n\r\n")
body.appendString("\(value)\r\n")
}
}
// if file is not selected, it will not upload a file to server, because we did not declare a name file
var filename = ""
if imageSelected == true {
filename = "video-\(uuid).mp4"
}
let mimetype = "video/mp4"
body.appendString("--\(boundary)\r\n")
body.appendString("Content-Disposition: form-data; name=\"\(filePathKey!)\"; filename=\"\(filename)\"\r\n")
body.appendString("Content-Type: \(mimetype)\r\n\r\n")
body.append(videoData)
body.appendString("\r\n")
body.appendString("--\(boundary)--\r\n")
return body as Data
}
// File Conversion
func encodeVideo(dataPath: URL){
let avAsset = AVURLAsset(url: dataPath)
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")
//uploadVideo(filePath)
//deleteFile(filePath!)
if FileManager.default.fileExists(atPath: myDocPath!){
do{
try FileManager.default.removeItem(atPath: myDocPath!)
}catch let error{
print(error)
}
}
//self.uploadVideo((myDocPath as AnyObject) as! URL)
exportSession?.outputURL = filePath
exportSession?.outputFileType = AVFileType.mp4
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
}
}
}
// File Upload
func uploadVideo(_ videoData: Data) {
func createBodyWithParams(_ parameters: [String: String]?, filePathKey: String?, videoData: Data, boundary: String) -> Data {
let body = NSMutableData();
if parameters != nil {
for (key, value) in parameters! {
body.appendString("--\(boundary)\r\n")
body.appendString("Content-Disposition: form-data; name=\"\(key)\"\r\n\r\n")
body.appendString("\(value)\r\n")
}
}
var filename = ""
if imageSelected == true {
filename = "video-\(uuid).mp4"
}
let mimetype = "video/mp4"
body.append("--\(boundary)\r\n".data(using: String.Encoding.utf8)!)
body.appendString("Content-Disposition: form-data; name=\"\(filePathKey!)\"; filename=\"\(filename)\"\r\n")
body.appendString(String(describing: "Content-Type: \(mimetype)\r\n\r\n".data(using: String.Encoding.utf8)))
body.append(videoData)
body.append(String(format: "\r\n").data(using: String.Encoding.utf8)!)
body.append("--\(boundary)--\r\n".data(using: String.Encoding.utf8)!)
return body as Data
}
let id = user!["id"] as! String
uuid = UUID().uuidString
let url = URL(string: "http://www.foo.com/videoposts.php")!
var request = URLRequest(url: url)
request.httpMethod = "POST"
let param = [
"id" : id,
"uuid" : uuid
]
// body
let boundary = "Boundary-\(UUID().uuidString)"
request.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")
// if picture is selected, compress it by half
let imageData = Data()
// ... body
request.httpBody = createBodyWithParams(param, filePathKey: "file", videoData: imageData, boundary: boundary)
// launch session
URLSession.shared.dataTask(with: request) { data, response, error in
// get main queu to communicate back to user
DispatchQueue.main.async(execute: {
if error == nil {
do {
// json containes $returnArray from php
let json = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as? NSDictionary
// declare new var to store json inf
guard let parseJSON = json else {
print("Error while parsing")
return
}
// get message from $returnArray["message"]
let message = parseJSON["message"]
// if there is some message - post is made
if message != nil {
// reset UI
self.postBtn.alpha = 0.4
self.imageSelected = false
// switch to another scene
self.tabBarController?.selectedIndex = 4
}
} catch {
// get main queue to communicate back to user
DispatchQueue.main.async(execute: {
let message = "\(error)"
appDelegate.infoView(message: message, color: colorSmoothRed)
})
return
}
} else {
// get main queue to communicate back to user
DispatchQueue.main.async(execute: {
let message = error!.localizedDescription
appDelegate.infoView(message: message, color: colorSmoothRed)
})
return
}
})
}.resume()
}

Answer 1

Try to check if there is already some file exists in the directory that you are trying to save at. You can add the following code.
do { // delete old video
try FileManager.default.removeItem(at: savePathUrl)
} catch { print(error.localizedDescription) }