Convert a you tube downloaded video to MOV format in iOS - ios

Question

I'm developing an iOS app, which needs to convert a video downloaded using you tube APIs into .mov format. I've tried using AVExportSession output file type set to .mov.`
NSURL * mediaURL = [NSURL fileURLWithPath:outputURL];
AVAsset *video = [AVAsset assetWithURL:mediaURL];
AVAssetExportSession *exportSession = [AVAssetExportSession exportSessionWithAsset:video presetName:AVAssetExportPreset1920x1080];
exportSession.shouldOptimizeForNetworkUse = YES;
exportSession.outputFileType = AVFileTypeQuickTimeMovie;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsPath = [paths objectAtIndex:0]; //Get the docs directory
documentsPath=[documentsPath stringByAppendingString:#"/Youtube"];
BOOL isDir;
if (![[NSFileManager defaultManager] fileExistsAtPath:documentsPath isDirectory:&isDir]) {
NSError *createDirError;
if (![[NSFileManager defaultManager] createDirectoryAtPath:documentsPath withIntermediateDirectories:YES attributes:nil error:&createDirError]) {
if (createDirError) {
NSLog(#"eror while creating dir == %#", createDirError);
}
}
}
documentsPath = [documentsPath stringByAppendingPathComponent:[NSString stringWithFormat:#"%d.mov",arc4random()%10000]];
exportSession.outputURL = [NSURL fileURLWithPath:documentsPath];
[exportSession exportAsynchronouslyWithCompletionHandler:^{
switch (exportSession.status) {
case AVAssetExportSessionStatusCompleted:
{
ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
[library writeVideoAtPathToSavedPhotosAlbum:[NSURL fileURLWithPath:outputURL] completionBlock:^(NSURL *assetURL, NSError *error) {
if (error) {
NSLog(#"error>%#",error.description);
}
else{
if([[NSFileManager defaultManager] fileExistsAtPath:outputURL])
{
[[NSFileManager defaultManager]removeItemAtPath:outputURL error:nil];
}
NSLog(#"asseturl>%#",assetURL);
[[NSFileManager defaultManager] removeItemAtPath:outputURL error:nil];
[self addAssetURL:assetURL toAlbum:#"Fame" withCompletionBlock:^(NSError *error) {
if(error)
{
NSLog(#"Error in saving to Fame album : %#",error.description);
return;
}
}];
}
}];
}
break;
case AVAssetExportSessionStatusFailed:
NSLog(#"Error : %#",exportSession.error.description);
default:
break;
}
NSLog(#"done processing video!");
}];
`
This code saves the video to gallery, but when I fetch the video using asset library, I get mp4 in the url.