Просмотр исходного текста страницы Several Webcams on One Machine

A problem with several webcams is USB bandwidth. By default, we couldn't 
attach more than one webcam to a single USB host.

We could tweak the webcam driver, so that it doesn't claim too much of USB.

<pre>
modprobe uvcvideo quirks=128
</pre>

or

<pre>
echo 128 > /sys/module/uvcvideo/parameters/quirks
</pre>

Note that the greater resolution you want, the less webcams you will be able 
to connect! I could attach three webcams to one host with width=426:height=320 
(fps is unknown). (We used this http://www.logitech.com/ru-ru/webcam-communications/webcams webcam).



If a PC has several distinct USB hosts, webcams could be attached to different 
ones.

This page http://patchwork.linuxtv.org/patch/4530/ suggests that the number of 
cameras can be improved further by patching the kernel driver.

Here's a script I used for testing:

<pre>
#!/bin/bash
# Run with cmdline to pass to the driver
# Use something like width=75:height=48:noaudio
for i in /dev/video*;  do
       mplayer tv:// -tv device=$i:$1 &
       sleep 1
done

wait %1 %2 %3
</pre>
[[Категория:HOWTO]]