[Gllug] running TV and webcam simultaneously

[Chris Bell]

On Fri 19 Apr, Paul Brazier wrote:
> 
> I've got a TV card (PCI) and a Webcam (USB), both of which work under
> Linux on their own but I can't seem to be able to get them to work
> simultaneously or even to be able to switch between the two.
> 
> If I boot with the webcam unplugged everything defaults to the TV card.
> If I boot with the webcam plugged in as well xawtv shows the webcam
> output only but the xawtv menu that selects the video input doesn't have
> an option to switch to the TV card.
> 
> I think I have all the modules installed for both OK. (bttv, pwc, pwcx,
> etc.)
> 
> It seems to be done through /dev/video symlinked to /dev/video0. I've
> tried changing the symlink around to /dev/video1 etc but no luck.
> 
> So firstly is it possible in theory to have them both running at once
> and secondly how do I switch between the two video inputs without
> rebooting?
> 
> I'm using Debian with a self-compiled 2.4.18 kernel.
> 
> --
> Paul 
> 
   You will probably have trouble with any two sources unless you can
synchronise them together. A single FIFO frame store requires rather more
memory than that in a TV card; there are some inexpensive cameras which do
have a reference input, but they will not be the cheapest webcams.


-- 
Chris Bell



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