Performances, Delays and Recommendations

The Ncam AR Suite plugins have been tested thoroughly to measure the total latency through a complete augmented reality camera chain. Assuming a set-up where both Ncam Reality and Unreal are fed directly by the same video source the maximum delay from the back of the camera to output to an SDI monitor is 7 frames.

Details of the performed test:

The following provides some recommendations to tweak the Aja and Ncam Profile configurations to minimize the total latency and improve performance.

It is recommended to check the “Wait for Sync Event” Synchronization Option in the Aja Media Output Configuration to improve the stability of the SDI output stream.

Make sure to choose a reasonable size for the output buffers. Keep in mind that the larger the buffers the better stability (lower risk of drop frames) but the greater the delay. A good compromise is to set both buffer sizes to 2.

When using the Aja genlock, it is recommended that the “Wait for Frame to be Ready” option is enabled. This will reduce the risk of a genlock firing before a frame was completely read which causes input frames to be dropped.

If your system presents network / video feed delays, it is recommended that the input buffer sizes of both the Aja and Ncam Media Sources are increased. The maximum buffer size is 32. This will consume more memory, but will also reduce the risk for the Timecode Synchronizer of not finding ready frames when synchronizing. Increasing this buffer size has no impact on the total latency.