CDPVideoRecord

美颜录制，并可以在录制时随时切换摄像头和开关美颜功能。

An video camera,you can have realtime of a beautify,and change camera position.Details see demo.

init初始化

-(instancetype)initWithFrame:(CGRect)frame cameraPosition:(AVCaptureDevicePosition)cameraPosition openBeautify:(BOOL)openBeautify isFullScreen:(BOOL)isFullScreen addToSuperview:(UIView *)superView;

start record开始录制

-(void)startRecording;

end record结束录制

-(NSURL *)finishRecordingAndSaveToLibrary:(BOOL)isSave;