Cameratracking Jitters with bo | Forum

Cameratracking Jitters with both Vive Mars and Antilatency

Hi!

We recently received a Vive Mars system after a few years of using Antilatency for Cameratracking.
After setting up the Vive Mars we couldnt get rid of small jitters that occur with the tracking signal.
After days of troubleshooting we decided to get back to Antilatency because we have a deadline for a Virtual Production shoot the day after tomorrow, however now we see that the jittering is also happening in Antilatency.
It happens when the camera is standing still, you can see it offsetting a few pixels.

We use an Antilatency floor setup and have never before experienced these problems.

Could this be an Aximmetry issue? In the meantime we're gonna try and setup cameratracking directly to Unreal without Aximmetry to see if the problem is still there.

Thanks!

Niels

Het Nieuwe Kader

Live Link in Unreal also has jittering.

Het Nieuwe Kader

After calibrating Antilatency is perfect, it seems to be a limitation of the Vive Mars.

TwentyStudios

Both Antilatency and especially Vive Mars have jitter due to inherent limitations of the hardware. Out of the lower cost tracking solutions, ReTracker Bliss has been the only one that’s virtually jitter free.

Eifert@Aximmetry

Hi,

To handle the jitter when the camera is standing still, you can turn on or adjust Tracking Stationary Tolerance in Vive Mars. Should be available in your Vive Mars from version 3.01.999.10 (Mars Dashboard > Settings > Tracking stationary tolerance).
When it is turned on, you should get a fixed transformation value in the Camera Tracking module when your camera is not moving. Follow this documentation to learn how to use the Camera Tracking module: https://aximmetry.com/learn/virtual-production-workflow/preparation-of-the-production-environment-phase-i/tracking/how-to-set-up-tracking-systems-in-aximmetry/#checking-the-tracking-data-flow

Tracking Stationary Tolerance in Vive Mars is a similar feature to Aximmetry's Tracking Dejitter in the INPUTS:

In short, enabling Tracking Dejitter will lock the camera to a fixed position while the camera doesn't move more than Dejitter Pos Thresh and doesn't rotate more than Dejitter Rot Thresh.

Since Vive Mars from version 3.01.999.10 you can also turn on Motion filter (Mars Dashboard > Settings > Motion Filter):
Filtering the noise of tracking data helps to minimize the image jitter while the camera is in extremely stable movement, such as on motorized slider, jib,… Once you found image jitter in slow movement, there are two modes we suggested:
Motor movement: Using this mode when you slowly pan or move camera on a motorized slider.
Manual movement: Using this mode when you slowly pan or move camera on tripod/slider by hand.

If the Motion filter is already turned on, you might want to turn it off and see if turning it off helps with your issue.

Warmest regards,

Cameratracking Jitters with both Vive Mars and Antilatency

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