Capture Video in Mp4 format - ios

Question

I am using UIImagePickerController to record video, the problem is its recording the video in mov format for android compatibility.
I need to convert the video into mp4 format using below code the issue is its taking hell of a time for a 6 sec video it takes around 30 to 35 seconds.
Any solution that I can directly record the video in mp4 format or faster method would be of great help. Thanks in Advance
-(void)movToMp4:(NSURL *)videoURL{ // method for mov to mp4 conversion
AVURLAsset *avAsset = [AVURLAsset URLAssetWithURL:videoURL options:nil];
NSArray *compatiblePresets = [AVAssetExportSession exportPresetsCompatibleWithAsset:avAsset];
if ([compatiblePresets containsObject:AVAssetExportPresetLowQuality])
{
AVAssetExportSession *exportSession = [[AVAssetExportSession alloc]initWithAsset:avAsset presetName:AVAssetExportPresetPassthrough];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString* videoPath = [NSString stringWithFormat:#"%#/xyz.mp4", [paths objectAtIndex:0]];
exportSession.outputURL = [NSURL fileURLWithPath:videoPath];
exportSession.outputFileType = AVFileTypeMPEG4;
[exportSession exportAsynchronouslyWithCompletionHandler:^{
switch ([exportSession status]) { // switch case to get completion case where i put my delegate
return;
break;
case AVAssetExportSessionStatusCompleted: {
[self.delegate mp4Response:videoPath];
break;
}
}
}
}];
}
}

Answer 1

Yes because it takes time when you load video from library / album using AVURLAsset.
So you need to use block here to load video from library.
Also line
[self.delegate mp4Response:videoPath];
Which in a completion block - It should be on main thread.
Follow this approach:
UIImagePickerController delegate method to get videos from library.
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
NSURL *localUrl = (NSURL *)[info valueForKey:UIImagePickerControllerMediaURL];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString* videoPath = [NSString stringWithFormat:#"%#/xyz.mp4", [paths objectAtIndex:0]];
NSURL *outputURL = [NSURL fileURLWithPath:videoPath];
[self convertVideoToLowQuailtyWithInputURL:localUrl outputURL:outputURL handler:^(AVAssetExportSession *exportSession)
{
if (exportSession.status == AVAssetExportSessionStatusCompleted) {
NSLog(#"Capture video complete");
[self performSelectorOnMainThread:#selector(doneCompressing) withObject:nil waitUntilDone:YES];
}
}];
[self dismissViewControllerAnimated:YES completion:nil];
}
- (void)convertVideoToLowQuailtyWithInputURL:(NSURL*)inputURL outputURL:(NSURL*)outputURL handler:(void (^)(AVAssetExportSession*))handler {
[[NSFileManager defaultManager] removeItemAtURL:outputURL error:nil];
AVURLAsset *asset = [AVURLAsset URLAssetWithURL:inputURL options:nil];
AVAssetExportSession *exportSession = [[AVAssetExportSession alloc] initWithAsset:asset presetName:AVAssetExportPresetPassthrough];
exportSession.outputURL = outputURL;
exportSession.outputFileType = AVFileTypeMPEG4;
[exportSession exportAsynchronouslyWithCompletionHandler:^(void) {
handler(exportSession);
}];
}
In didFinishPickingMediaWithInfo method observed this line:
[self performSelectorOnMainThread:#selector(doneCompressing) withObject:nil waitUntilDone:YES];
It will call a one more method doneCompressing in main thread (in foreground). So that you can call delegate method in doneCompressing. And this will reduce time.
- (void) doneCompressing {
[self.delegate mp4Response:videoPath];
}

Answer 2

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
NSLog(#"file info = %#", info);
NSString *pickedType = [info objectForKey:#"UIImagePickerControllerMediaType"];
NSData *videoData;
if ([pickedType isEqualToString:#"public.movie"]){
NSURL *videoUrl=(NSURL*)[info objectForKey:UIImagePickerControllerMediaURL];
videoData = [NSData dataWithContentsOfURL:videoUrl];
}
[self dismissViewControllerAnimated:YES completion:^{
//
[self writeFileData:videoData];
}];
}
// to get path of document directory
- (NSString *)applicationDocumentsDirectory
{
// return [[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask] lastObject];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
return documentsDirectory;
}
- (void) writeFileData:(NSData *)fileData{
float size = fileData.length / (1024 * 1024);
NSString *fileName = nil;
NSString *strPath = nil;
NSString *documentsDirectory = [self applicationDocumentsDirectory];
double CurrentTime = CACurrentMediaTime();
fileName = [NSString stringWithFormat:#"%d.mp4",(int)CurrentTime];
strPath = [documentsDirectory stringByAppendingPathComponent:fileName];
NSFileManager *filemanager=[[NSFileManager alloc] init];
NSError *er;
if (![filemanager fileExistsAtPath:documentsDirectory]) {
[filemanager createDirectoryAtPath:documentsDirectory withIntermediateDirectories:YES attributes:nil error:&er];
NSLog(#"error in folder creation = %#", er);
}
NSLog(#"size of data = %lu", (unsigned long)[fileData length]);
BOOL saved = [fileData writeToFile:strPath atomically:YES];
if (saved) {
NSURL *videoURL = [NSURL URLWithString:strPath];
// now u can handle mp4 video from videoURL
}
else
return;
}