search

psmoveservice / PSMoveService

A background service that communicates with the psmove and stores pose and button data.
Apache License 2.0
593 stars 146 forks source link

Will running 4 cameras off of a USB Hub, powered or not, work? #598

Open NeonCoding opened 5 years ago

NeonCoding commented 5 years ago

In the middle of setting up my VR setup, I had an idea of running it off a USB hub. I don't know if it will work. Does anyone have any experience of running 4 cameras off of a USB hub, and if so will it need to be powered. (Note that the USB hub will likely also need to be connected to an USB extension cable.)

HipsterSloth commented 5 years ago

This sort of question is generally best asked on the google group since it's seen by more people: https://groups.google.com/forum/?pli=1#!forum/psmoveservice

It's my understanding that it's possible BUT it will almost certainly have to be a powered USB3 hub. With 4 cameras you risk saturating the USB root hub bandwidth that the cameras are connected to.

If I recall correctly DaleyTech has two powered USB hubs and connects two cameras per hub: https://www.youtube.com/watch?v=SYhje06EJUs&list=PLM_NtdgT2QVf92LpacLIM2cczxQmQHTYX

I'm going to mark this issue as resolved for tracking purposes, but feel free to keep posting in this thread if you have additional questions.

NeonCoding commented 5 years ago

So at that point would it just be more efficient and cost effective to order extension cables instead? Because ordering 2 2-port Powered USB hubs is near impossible and ordering 2 four port powered usb 3 hubs just seems overkill and expensive, for the kind of budget Im planning on. If so, one of my cables is probably going to have to run 5 metres, will a usb extension cord for that need to be an active one?

DJPlaya commented 5 years ago

Well, ive learned that for proper tracking, all Cameras have to be synchronized which isent possible with a Hub. You can use one, but for the best tracking Results it is recommended to connect each Camera to a dedicated USB Port.