Q: What is the latency on the camera feed in Discovery Powered by NaviSuite and can it be used for piloting?
A: Yes. The camera feed latency is around one-tenth of a second, which is low enough to pilot the ROV directly from the feed. The exact figure depends on the selected video resolution, the aspect ratio, and the software used to view the stream.
In Discovery Powered by NaviSuite (approximate; full-screen figures in brackets):
- Low Latency (1080p): average ~141 ms (~130 ms full-screen), minimum ~110 ms (~99 ms full-screen). Recommended for piloting.
- Full Resolution (2816p): average ~186 ms (~180 ms full-screen), minimum ~160 ms. Best for recording ultra-high-resolution video rather than piloting.
In the Voyis Discovery GUI, the Voyis Discovery user manual quotes the following for the Discovery Stereo camera (measured in full-screen mode at 30 fps and 20 Mbps over 60 frames):
- Low Latency (1080p): ~98 ms with 16:9 aspect ratio, ~115 ms without.
- Full Resolution: ~136 ms with 16:9 aspect ratio, ~172 ms without.
The two sets of figures differ because they are measured through different software (Discovery Powered by NaviSuite versus the Voyis Discovery GUI); both confirm latency low enough for ROV piloting.
Note: Running the GUI in full-screen mode reduces latency further. See the Voyis VSLAM Powered by EIVA NaviSuite Quick start guide for video resolution settings.