Zed 2i video stream is misaligned and continuously flickering

Hardware ZED2
1

Hi there,
I was trying to use Zed 2i to capture images, when I was using ZED_Explorer to view the video stream, I saw the the video stream was misaligned and flickering, please see picture below

image
image1373×1033 74.8 KB

I tried lower the resolution and got no difference, do you know what happened? Did I do something wrong? Thank you!
FYI, the diagostic result is as follows:

ZED Diagnostic Tool

- Running ZED SDK Diagnostic : OK  
    ZED SDK version: 5.0.3
    CUDA version: V12.8.93
- Running Processor Diagnostic : OK  
    Processor:   Intel(R) Xeon(R) Silver 4216 CPU @ 2.10GHz
    Motherboard:  0T32V9, Dell Inc.
Error: unable to open display localhost:10.0
- Running Graphics Card Diagnostic : OK  
    Graphics card:  NVIDIA RTX A5000
- Running AI Models Diagnostic : OK  
    MULTI CLASS DETECTION is not optimized
    MULTI CLASS MEDIUM DETECTION is not optimized
    MULTI CLASS ACCURATE DETECTION is not optimized
    HUMAN BODY FAST DETECTION is not optimized
    HUMAN BODY MEDIUM DETECTION is not optimized
    HUMAN BODY ACCURATE DETECTION is not optimized
    HUMAN BODY 38 FAST DETECTION is not optimized
    HUMAN BODY 38 MEDIUM DETECTION is not optimized
    HUMAN BODY 38 ACCURATE DETECTION is not optimized
    PERSON HEAD DETECTION is not optimized
    PERSON HEAD ACCURATE DETECTION is not optimized
    REID ASSOCIATION is not optimized
    NEURAL LIGHT DEPTH is not optimized
    NEURAL PLUS DEPTH is not optimized
    NEURAL DEPTH is optimized
- Running Camera Test Diagnostic : OK  
    Camera: ZED 2i
    Firmware: 1523
- Running Devices Diagnostic : Failed
    Low USB bandwidth  Read our FAQ to troubleshoot your USB connection issues. (https://support.stereolabs.com/hc/en-us/articles/207635225' style='color: #d9ff42;' >Learn more Frame drops: -1/500 Frame tearing: 501/500

Diagnostic finished, a file has been generated : ZED_Diagnostic_Results.json
2

Hi @Mark345
Welcome to the StereoLabs community.

This is a clear USB 3 communication issue.
Please check and reply to these questions:

  • Are you using the original USB3 cable?
  • Are the screws of the USB3 connector strongly strengthened?
  • Are you using a cable longer than 3 m?
  • Are you using USB3 hubs?
  • Is the cable placed close to sources of noise, like power cables or motor cables?
  • Is the USB3 port on the host side stable?
  • Have you tested other USB3 ports and host devices?
3

@Myzhar Thanks for the quick response. To answer your questions:

  • This shapshot was taken when testing on a Dell R7920 server
  • We always use the original cable
  • We always connected the cable to the host directly and I didn’t see any loose connector or something.
  • We tested other ports as well as other host devices like Jetson Orin and Dell T3650 workstation
  • Swithed to other USB ports on R7920 didn’t make any difference
  • the symptom is much more midler when testing on a Jetson Orin
  • Tests on T3650 were completely normal
  • As for the sources of noise, the ZED camera was tied to a robotic arm, not sure if that matters. I’ll run more tests regarding the noise sources and get back to you later, thanks again for the guidance.
4

Hi, @Myzhar
I was wrong about the cable, I thought it was an origional cable but later found out is wasn’t. After I purchased a origional-like cable the camera displayed normally. Thanks again for the help!

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