[Date Prev][Date Next] [Thread Prev][Thread Next] [Date Index] [Thread Index]

Re: drivers for USB webcams

On Mon, Aug 29, 2005 at 09:33:42AM +0300, Riku Voipio wrote:
> The two most common webcam chips, pwc[1] and ov511[1] have open-source
> drivers. PWC driver used to have binary-only "decompressor" module,
> that allowed higher framerate and/or resolution while losing some
> image quality. That code has been since reverse-engineered, and is
> available in source format.
> As far as I know, only "Logitech QuickCam Sprehe", using driver
> pwc has pan/tilt/zoom suppport, but it's image quality isn't stellar
> and the device is quite expensive for it's features. 
> Since most webcams use usb 1.1 bus, you will run out of USB bandwith,
> if you try to read video from more than one webcam at a time. You might 
> want to consider network-based cameras, such like "Linksys WVC54G" 
> or any of the Axis cameras.

Wouldn't seperate usb controllers have independant bandwidth?

Going through a hub could be bad, unless it is one of the nicer usb 2
hubs that can deal with multiple usb1 devices efficiently (I think I
read some can do that).

A 4 or 5 port usb card isn't expensive after all.

Len Sorensen

Reply to: