3 Newbie Questions

Archived from groups: alt.comp.periphs.webcam (More info?)

Hi !

(1)

USB 2.0 max speed is 60 MB/sec (= 480Mb/sec) ?

USB 1.1 max speed is 12 mb/sec ?

(2)

Is it possible, to connect up to 4 Webcams via an (active) USB Hub to a PC

and control them (start/stop/fetch videos) from there ?

(3)

Is there any (Java ?)-Application out there, that can show up to 4
Video-Streams synchronously in parallel ?

(needs not to be real-time)



Any hints welcome !

Chris

Archived from groups: alt.comp.periphs.webcam (More info?)

Thanks for fast and profund response !

"Si Ballenger" <shb*NO*SPAM*@comporium.net> wrote in message
news:429ddf38.161032232@news.comporium.net...
> On Wed, 1 Jun 2005 17:26:52 +0200, "Christoph Neubauer"
> <christoph.neubauer@siemens.com> wrote:
>
> >Hi !
> >
> >(1)
> >
> >USB 2.0 max speed is 60 MB/sec (= 480Mb/sec) ?
> >
> >USB 1.1 max speed is 12 mb/sec ?
> >
>
> The usb bandwidth is shared by all the devices on the usb port.
> For actual "webcam" use on the internet, the normal bandwidth
> available for the end user is much lower than the usb spec, so
> there is really no difference there between the two.
>
> >(2)
> >
> >Is it possible, to connect up to 4 Webcams via an (active) USB Hub to a
PC
> >
> >and control them (start/stop/fetch videos) from there ?
> >
>
> Most usb webcams use the generic windows WMD drivers, which
> usually allows only one cam to use the driver at a time.
>
> >(3)
> >
> >Is there any (Java ?)-Application out there, that can show up to 4
> >Video-Streams synchronously in parallel ?
>
> With the proper setup (video capture cards and/or video switcher
> and such), you can show several cams at once. Below is a test
> page I have with four cams connected that uses a winnov capture
> card and the free webcam2000 webcam application.
>
> http://www.geocities.com/zoomkat/wc2000apptest.htm
>
>

Archived from groups: alt.comp.periphs.webcam (More info?)

I use WatcherForYou with 4 webcams from different manufacturers, it can
control all 4 Video-Streams synchronously in parallel, such as, turn
on/off/record, even do motion detection. You can dowload it from
www.comctech.com and try 30 days for free.