Enable Video Trimming

imagePicker property settings

func imagePicker(source:UIImagePickerControllerSourceType) -> UIImagePickerController {
	let picker = UIImagePickerController()
	picker.sourceType = source;
	picker.mediaTypes = [kUTTypeMovie as String]
	picker.allowsEditing = true;
	picker.delegate = self;

	return picker
}

func imagePicker(source:UIImagePickerControllerSourceType) -> UIImagePickerController {
	let picker = UIImagePickerController()
	picker.sourceType = source;
	picker.mediaTypes = [kUTTypeMovie as String]
	picker.allowsEditing = true;
	picker.delegate = self;

	return picker	
}

func convertVideToGIF(videoURL: NSURL, start: NSNumber?, duration: NSNumber?){
	dispatch_async(dispatch_get_main_queue()){
		self.dismissViewControllerAnimated(true, completion: nil)
	}

	let regift: Regift;

	if let start = start {
		regift = Regift(sourceFileURL: videoURL, destinationFileURL: nil, startTime: start.floatValue, duration: duration!.floatValue, frameRate: frameRate, loopCount: loopCount)
	} else {
		// Untrimmed
		regift = Regift(sourceFileURL: videoURL, destinationFileURL: nil, frameCount: frameCount, delayTime: delayTime, loopCount: loopCount)
	}

	let gifURL = regif.createGif()
	let gif = Gif(url: gifURL!, rawVideoURL: videoURL, caption: nil)
	displayGIF(gif)
}

public func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo
	info: [String : AnyObject]){
	let mediaType = info[UIImagePickerControllerMediaType] as! String

	if mediaType == kUTTypeMovie as String {

		let videoURL = info[UIImagePickerControllerMediaURL] as! NSURL
		let start: NSNumber? = info["_UIImagePickerControllerVideoEditingStart"] as? NSNumber
		let end: NSNumber? = info["_UIImagePickerControllerVideoEditingEnd"] as? NSNumber	
		var duration: NSNumber?
		if let start = start {
			duration = NSNumber(float: (end!.floatValue) - (start.floatValue))
		} else {
			duration = nil
		}
		convertVideoToGIF(videoURL, start: start, duration: duration)
	}	
}