usb/xawtv help needed

Mon May 17 11:30:13 PDT 2004

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Hi,

Just did some test with my notebook. My cam is a Vesta Pro (PCVC680K).

For a fresh COL 3.1.1 install you have to:

Get the pwcx-i386 module
(http://www.smcc.demon.nl/webcam/release.html#pwcx)
and put it in /lib/modules/2.4.13/kernel/drivers/usb 

Then, edit /etc/modules.conf and add the following lines:
options pwc size=sif fps=15 power_save=1
post-install pwc insmod -f pwcx-i386

These lines will set the driver to 320x240 at 15fps and enable power
saving.
You can get all the options available from: 
http://www.smcc.demon.nl/webcam/install.html#param

After that, download the latest version of xawtv (it should be 3.56 and
the version shiped with COL 3.1.1 is 3.53).
You canget it from http://bytesex.org/xawtv/ (latest is 3.74)
I used:
./configure --enable-xfree-ext --enable-xvideo && make && make install
(run make install as root)

But don't forget to do rpm -e xawtv to remove the old package!!!

Optional: use checkinstall instead of make install to make binary RPMS

Finally, remember to chmod 0666 /dev/video* to be able to use your
webcam as a normal user.

That's it.

On Sat, 20 Apr 2002 09:44:11 -0700, Net Llama! wrote:

>Actually, Joel, i finally got the camera working last night at 1AM.  For 
>anyone else's benefit (i'll writeup a SxS eventually with alot more 
>details), here's what i had to do to get this Philips 690 functional:
>1) Build 2.4.18 from source with video4linux (v4l) module *AND* 
>philips-web-cam (pwc).  Also build the modules for USB support (usbcore 
>and usb-uhci).
>2) Activate DGA and v4l in XF86Config (and restart X).
>3) Build & install hotplug and xawtv
>4) Setup /dev/video0 with correct major/minor numbers
>5) Load all the relevant modules, in this order:
>pwc, pwcx-i386, videodev, usbcore, usb-uhci
>
>It looks to me that the bttv module is only needed if you have a TV 
>tuner card, otherwise it has no purpose.
>
>I've now got a few remaining problems.  The first is how to get the 
>modules to load in the correct order via modules.conf.  modprobing 
>usb-uhci doesn't load pwce.  modprobing pwce doesn't load usb-uhci.  So 
>basically its a 2 step process, and i can't quite figure out the correct 
>aliases in modules.conf to make it load in the correct order.
>
>THe 2nd is that xawtv refuses to obey the resolution parameter that i'm 
>feeding it:
>xawtv -geometry 352x288-0+0
>and keeps defaulting back to 128x96 (which looks like crap).  My camera 
>is definitely capable of doing 640x480 @16fps, so its not a hardware 
>limitation.  I'm seeing this error from xawtv as it defaults to the 
>lesser resolution:
>ioctl: VIDIOCMCAPTURE(0,fmt=7,size=128x96): Invalid argument
>
>Even if i run it without the higher resolution , the same error appears.
>
>And the final error is occuring whenver i try to take a snapshot with 
>the camera:
>JPEG parameter struct mismatch: library thinks size is 372, caller 
>expects 376
>
>My research seems to indicate that this is a bug in an older version of 
>libjpeg (like version 6a).  However, i've got libjpeg-6b-18 which is 
>basically the newest stable release, so i'm stumped.
>
>Any suggestions or ideas are quite welcome.  Thanks!
>
>Joel Hammer wrote:
>> I have no idea how many of my comments are relevant to your webcam problem
>> but you did say "anybody."
>> I have a video capture card. 
>> I have the same /dev/video0 device and a videodev module loaded.  I am using kwintv,
>> not xawtv, but xawtv seems to need the bttv driver, which you don't list
>> with lsmod.
>> Here is the complete list of modules I have for my video capture card and
>> for my usb game pad:
>> bttv                   57508   0  (unused)
>> tuner                   3988   1
>> tda9875                 2380   0  (unused)
>> tda7432                 2560   0  (unused)
>> msp3400                13620   0  (unused)
>> videodev                2944   2  [bttv]
>> i2c-algo-bit            7444   1  [bttv]
>> i2c-dev                 4080   0  (unused)
>> i2c-core               12556   0  [bttv tuner tda9875 tda7432 msp3400
>> i2c-algo-bit i2c-dev]
>> hid                    12016   0  (unused)
>> usb-uhci               21720   0  (unused)
>> usbcore                27940   0  [hid usb-uhci]
>> evdev                   3624   0  (unused)
>> joydev                  6212   0  (unused)
>> input                   3264   0  [hid evdev joydev]     
>> 
>> Have you visited the xawtv home page?
>
>-- 
>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>L. Friedman                       	       netllama at linux-sxs.org
>Linux Step-by-step & TyGeMo: 		    http://netllama.ipfox.com
>
>   9:05am  up 1 day, 16:01,  5 users,  load average: 0.53, 0.27, 0.23
>
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