sob., 18 maj 2019 o 13:04 Mauro Carvalho Chehab <mchehab+samsung@xxxxxxxxxx> napisał(a): > > Tomasz, > > Please don't top-post. Makes very confusing to for people to follow > the discussions on mailing lists. I'm sorry. > Most laptops use a single USB bus shared on all their ports. This is > easy to verify: the lsusb command shows on what bus a device is connected. > If you can place the 3 cameras on different buses, it may work there > (or if you have an USB 3.0 hub and connect the hub to an USB 3.0 port, > and the cameras on it, it might work as well). Hmm. I have both USB 3.0 and USB 2.0 on my laptop, and I connected the 3 grabbers to USB 3.0 HUB, but the HUB was then connected to USB2.0 port :(. My mistake. So I need to check what will happen when I connect the HUB to USB3.0 port. But I will be at home in a week. If it works, then maybe it will be possible to use 3 grabbers with a single Orange Pi 3 (it has USB3.0), or NVIDIA Jetson Nano (the same price as 3x Raspberry Pi 3). >Without taking into account the limited speed and features of the CPU >found on RPi3, probably the only solution for using 3 cameras on a single >RPi3 would be: > > - 1 RPi Camera module using the special camera connector; > - 1 USB camera to a RPi USB port; > - 1 USB hat; > - 1 USB camera connected to the USB hat. I want to use 3 grabbers, because I have already installed 3 analog cameras at home, which are connected to a small CRT Display. I want to have remote access to them, and it looks like a fun project for a SBC. Thanks, Tomasz
