addSampleBuffer method of the RTRTextCaptureService protocol
Sends the video frame obtained from camera to the recognition service. Call this method to pass on the information provided by the captureOutput method of the AVCaptureVideoDataOutputSampleBufferDelegate protocol. The recognition service will pick the frames it needs from the succession of the frames you supply.
We recommend using the AVCaptureSessionPreset1280x720 preset for the camera settings.