Re: webcam support -- first success!!

From: michel Xhaard <mxhaard_at_magic.fr>
Date: Fri, 20 May 2005 22:18:10 +0200
Peter,
> On the page http://mxhaard.free.fr/camera.html "The Story of Two Little
> Cams" you write that jpeg is not supported by the kernel, does this mean
> that v4l cannot be used (in my case 2.4 kernel)? As far as I understand,
> most webcam software hooks into the v4l API.
spca5xx is fully compliant with the v4l1 API .To benefit of the jpeg stream 
encoded by the hardware we only extend the v4l API with our own palette 
jpeg . That way the spca5xx module only add the missing header and forward 
the full jpeg stream in user space. For all others palette the spca5xx module 
decode the jpeg stream in kernel space with the help of a tasklet :) ofcourse 
you need a strong Linux Box to work that way, i used a 2.2Ghz Athlon CPU and 
can work with two jpeg webcam at 640x480 with 15 fp/s :)
> (Since spcaview doesn't work for me (yet), I'm looking for another
> program, in particular since I want to set up something for remote
> viewing through a webserver.)
The best should be to used spcaserv in the same package as it forward the 
stream in MJPG, there are an java applet for the client size to setup in your 
webserver look at the spcaview package a all in one :)
For the resolution i did not know some spca500 works in 640x480 other in 
352x288 depend of the Sensor. I have chek for the i2c slave sensor address in 
debug mode, but your log say that the chip did not answer and return 0x00 :( 
regards
-- 
Michel Xhaard
Received on Fri May 20 2005 - 22:20:26 CEST

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