Femto Bolt Depth and IR Streams Delayed From Color Stream

Technical Support & Q&A
1

Hi, I’m using the K4A wrapper SDK v.1.10.3 with Windows to record with my Femto Bolt camera. When I use both the K4A viewer GUI (k4aviewer.exe) or K4A recorder (k4arecorder.exe), the depth and infrared streams are both lagging behind the color stream by ~1s.

I have seen other forum posts about the streams not being synced, but others had issues with the color being delayed, and I couldn’t find any solutions. I uninstalled the Azure Kinect SDK as well as the Orbbec SDK, so that just the Orbbec K4A Wrapper SDK remains. I heard that sometimes the other SDKs may interfere. I would like to just use the built in viewer and recorders from the K4A wrapper SDK.

Has anyone encountered this issue and found a solution? Thank you in advance!

2

I had a similar issue that was fixed by switching to a different USB-C cable.

I was geting a ~1s delayed depth stream + low depth FPS.

I’m not sure but I think the cable that didn’t work is this Macbook charging USB-C cable, which transfers data at USB 2 rates

I changed to a cable that says “Gen 1” on it and it worked, so it looks like even a Gen 1 USB-3 cable works.

EDIT: I think the camera includes the correct cable, I used the wrong one by accident…