Resolution problem when using VOXL2-mini USB3 to HDMI adapter

Eric Katzfey

@Jskim I'm sorry but I keep reading through your messages and am finding it hard to understand what you are asking. It sounds like everything works fine up to 1280x720@10fps. But you want at least 1280x720@30fps. What happens when you change 10 to 30? Does voxl-uvc-server not run? Or does it run fine but you see no output?

Jskim

@Eric-Katzfey
Thank you for your quick reply.

I have a problem with the VOXL2-mini USB3 port.
When I connect a USB3 camera directly to the VOXL2-mini, the camera is recognised but no output.
However, when we change the USB3 to USB2, the camera output is only 1280x720@10fps.

Correct. we want a minimum of 1280x720@30fps.
voxl-uvc-server is running. But no output is displayed.
what happens when you change 10 to 30?
A) When you change to 30, there is no output.

Thanks,

Eric Katzfey

@Jskim Ah, okay, that's more clear now. Have you considered the suggestions from @Vinny ? The USB 3.0 port on VOXL2 mini requires some extra capacitance or else it won't work. This is not normally provided by any standard cable and needs to be added in separately. Also, as per the documentation https://docs.modalai.com/voxl-uvc-server/ what output do you see if you enable debug messages? (e.g. voxl-uvc-server -d)

Jskim

@Eric-Katzfey
Thank you very much for the quick reply.

When I executed the voxl-uvc-server -d command, the screen froze.

Thanks,

Eric Katzfey

@Jskim Have you added the required capacitors as explained by @Vinny ?

Jskim

@Eric-Katzfey

Sorry, please tell me again how to add capacitors.

Thanks,

Jskim

@Jskim
USB3 to USB2 dongle.png

We tested it using a USB30 to USB2.0 cable.

1280x720@10fps is no problem.
1280x720@30fps does not work.

Thanks

milanerd

We also encountered the problem of 10 FPS limit when trying to stream HD video (1280x720 at more than 10 FPS) using USB3 to HDMI adapter on VOXL2.

@Jskim did you manage to identify/solve the issues somehow?

Moderator

@milanerd We have added a cable with built in extra capacitance https://www.modalai.com/products/mcbl-00022?variant=49030324060464

milanerd

@Moderator Thank you. If I understood well, the adapter with added capacitance solved the issue with HD stream at 30 FPS?

Moderator

@milanerd The added capacitance helps VOXL 2 Mini's USB port achieve USB 3 speeds. We don't have that adapter to confirm a fix for your issue, but with the cable the link should transfer much faster