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    Resolution problem when using VOXL2-mini USB3 to HDMI adapter

    VOXL 2 Mini
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    • Eric KatzfeyE
      Eric Katzfey ModalAI Team @Jskim
      last edited by

      @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?

      J 1 Reply Last reply Reply Quote 0
      • J
        Jskim @Eric Katzfey
        last edited by

        @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.

        1. Correct. we want a minimum of 1280x720@30fps.

        2. voxl-uvc-server is running. But no output is displayed.

        3. what happens when you change 10 to 30?
          A) When you change to 30, there is no output.

        Thanks,

        Eric KatzfeyE 1 Reply Last reply Reply Quote 0
        • Eric KatzfeyE
          Eric Katzfey ModalAI Team @Jskim
          last edited by

          @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)

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          • J
            Jskim @Eric Katzfey
            last edited by

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

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

            Thanks,

            Eric KatzfeyE 1 Reply Last reply Reply Quote 0
            • Eric KatzfeyE
              Eric Katzfey ModalAI Team @Jskim
              last edited by

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

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              • J
                Jskim @Eric Katzfey
                last edited by

                @Eric-Katzfey

                Sorry, please tell me again how to add capacitors.

                Thanks,

                J 1 Reply Last reply Reply Quote 0
                • J
                  Jskim @Jskim
                  last edited by

                  @Jskim
                  USB3 to USB2 dongle.png

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

                  1. 1280x720@10fps is no problem.
                  2. 1280x720@30fps does not work.

                  Thanks

                  1 Reply Last reply Reply Quote 0
                  • M
                    milanerd
                    last edited by

                    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?

                    ModeratorM 1 Reply Last reply Reply Quote 0
                    • ModeratorM
                      Moderator ModalAI Team @milanerd
                      last edited by

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

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                      • M
                        milanerd @Moderator
                        last edited by

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

                        ModeratorM 1 Reply Last reply Reply Quote 0
                        • ModeratorM
                          Moderator ModalAI Team @milanerd
                          last edited by

                          @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

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