How to sync images coming from multiple D435 ?

[Akumar201]

Hello, I am using Intel RealSense D435 cameras as wrist cameras for bimanual robotic arms, capturing video at 60fps. Currently, I am storing the data from both cameras, but when I replay the videos, they are not synchronized. Is there an inbuilt function in RealSense that ensures the feeds from multiple cameras remain synchronized during recording? I am using suggested cable from https://newnex.com/realsense-3d-camera-connectivity.php

[MartyG-RealSense]

Hi @Akumar201 You can synchronize depth data of multiple cameras using the RealSense SDK's hardware sync feature, though it involves purchasing individual electronic components and assembling them into a 'sync cable' to connect the cameras together via concealed sync pins under a small removable cap on top of the camera casing.

https://dev.intelrealsense.com/docs/multiple-depth-cameras-configuration

The cap should be removable by inserting a small thin object such as a pin or a paperclip into the hole in the middle of the cap.

[Akumar201]

@MartyG-RealSense , thank you for your response, I have a follow up question is there any way to synchronize images data from Intel RealSense D405 Webcam ? I want to take video of the screen from different camera and sync them together as currently the issue with this is it's not syncing.

[MartyG-RealSense]

D405 is not equipped with a set of hardware sync pins the other 400 Series models have that enable sync between multiple cameras. Even on models with sync pins, the RGB of multiple cameras cannot be hardware-synched though, except with the D415 model (and even then the depth-RGB sync did not work well).

It is possible to sync data from different cameras in software instead of hardware by using camera metadata. Information about this can be found at #2186