USB cable

glitchyordis

Hi, is it ok if I use usb-c to usb-c cable instead of the usb-c to usb-3 supplied? Would using USB 4 give any performance boost from eg 4k resolution of OAk-D pro? Would performance still be reduced by cable length if using a USB 3.2 or USB 4 cable?

erik

Hello glitchyordis ,
You can use USB-C to USB-C cable as well, just make sure that it's USB3 supported. Regarding USB4 - OAK cameras don't support it, so there wouldn't be any different. And you can also stream 30FPS 4k resolution with USB3, and even with USB2 if 4k frames are encoded 🙂 Thoughts?
Thanks, Erik

glitchyordis

erik
I'm thinking of upgrading my cable and would like to use the one supplied by Luxonis for OAK-D Pro as a reference.
May I know the USB version and generation for both ends of the USB cable?

erik

Hi glitchyordis ,
It's USB3, gen2 (up to 10gbps) - WRT connector on each side, it depends which cable you were looking at.

glitchyordis

erik
Hi Erik, the document mentions that the recommended cable length should not be > 2 m. Would using an active cable extender such as those below help?

erik

Hi glitchyordis ,
Yep, that would work🙂 We have tried 10m active USB3 cable and it worked as expected with OAK camera (see docs here).
Thanks, Erik

glitchyordis

Hi erik ,

I've tried to compare latency using the latency measurement code, with resolution set at 12MP.

Using the cable that came with my OAK-D PRO, I measured the latency on an SS10 and SS port on my desktop. However I noticed that there wasn't much difference in the avg latency, and "getUSbSpeed" returns "super" both USB ports. I expected a lower latency for the SS10 (super speed 10GB USB port).

I have also switched to another USB 3.2 10GBs cable (Lindy cable), and a similar response was returned.

Did I misinterpret the results or misunderstood the purpose of the latency measurement code?

erik

Hello glitchyordis ,
Sorry about the delay. I think you need to enable usb3 gen2 mode; could you try the following:
with dai.Device(pipeline, maxUsbSpeed=dai.UsbSpeed.SUPER_PLUS) as device:

vawela

Hello. I was under the impression you need an 8k hdmi cable to watch 4K. I bought one from ebay that said 4K on the front. I hooked it up. But the cable looks the same as my old HDMI. Is there a difference or did I flush $3 down the toilet?

jakaskerl

Hi vawela
The talk here is about USB, not HDMI; but you need at minimum 2.0 HDMI to stream 4k60 or a USB cable that is C->DP or C that supports thunderbolt 3 or more.

Thanks,
Jaka