Unable to convert to mp4 in iOS 13 - ios

Question

On a device running iOS 13, [exportSession exportAsynchronouslyWithCompletionHandler: always fails with message "The operation could not be completed" while converting .MOV video to mp4. However, the same code runs fine on iOS prior to 13 i.e 12. I am pasting below my complete method
- (void)encodeVideo:(NSString *)videoURL
{
// Create the asset url with the video file
AVURLAsset *avAsset = [AVURLAsset URLAssetWithURL:[NSURL fileURLWithPath:videoURL] options:nil];
NSArray *compatiblePresets = [AVAssetExportSession exportPresetsCompatibleWithAsset:avAsset];
// Check if video is supported for conversion or not
if ([compatiblePresets containsObject: AVAssetExportPresetLowQuality])
{
//Create Export session
AVAssetExportSession *exportSession = [[AVAssetExportSession alloc]initWithAsset:avAsset presetName:AVAssetExportPresetLowQuality];
//Creating temp path to save the converted video
NSString* documentsDirectory= [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString* myDocumentPath= [documentsDirectory stringByAppendingPathComponent:#"temp.mp4"];
NSURL *url = [[NSURL alloc] initFileURLWithPath:myDocumentPath];
//Check if the file already exists then remove the previous file
if ([[NSFileManager defaultManager]fileExistsAtPath:myDocumentPath])
{
[[NSFileManager defaultManager]removeItemAtPath:myDocumentPath error:nil];
}
exportSession.outputURL = url;
//set the output file format if you want to make it in other file format (ex .3gp)
exportSession.outputFileType = AVFileTypeMPEG4;
exportSession.shouldOptimizeForNetworkUse = YES;
[exportSession exportAsynchronouslyWithCompletionHandler:^{
switch ([exportSession status])
{
case AVAssetExportSessionStatusFailed:
NSLog(#"Export session failed");
break;
case AVAssetExportSessionStatusCancelled:
NSLog(#"Export canceled");
break;
case AVAssetExportSessionStatusCompleted:
{
//Video conversion finished
NSLog(#"Successful!");
}
break;
default:
break;
}
}];
}
else
{
NSLog(#"Video file not supported!");
}
}

Answer 1

1.
Create Folder -
let filePath = documentDirectory.appendingPathComponent("FolderName")
if !fileManager.fileExists(atPath: filePath.path) {
do {
try fileManager.createDirectory(atPath: filePath.path, withIntermediateDirectories: true, attributes: nil)
} catch {
print(error.localizedDescription)
return nil
}
}
2.
Let url = videoURL
destinationURL = filePath.appendingPathComponent("filename.mp4")
url.startAccessingSecurityScopedResource()
do {
try FileManager.default.copyItem(at: url, to: destinationURL)
} catch {
Logging.Log.error("EncodeVideo failed \(error.localizedDescription)")
}
url.startAccessingSecurityScopedResource()
Start Mov to MP4 now it is working.