[AG-TECH] vic and Logitech QuickCam 3000 Pro on Linux

[Don Morton]

[This was sent to AG-Tech listserv on Saturday, 06 July, with no
 response, so I decided to subject you all to it again :)  Seriously,
 I've added just a little more analysis and, I'm sending to the vic folks.
 I'm including AG-Tech simply because this strikes me as an issue that others
 will run into, wanting to use webcams in some of the more "basic" AGN 
 interfaces]

Howdy, 

I'm wondering if anybody has had experience in getting the Logitech
QuickCam 3000 Pro to work with vic on a Linux machine.  Here's
what I'm using

RedHat 7.3 (kernel 2.4.18-3)
vic 2.8ucl-1.1.3-AG 

I followed some great instructions, available at

    http://www.isthe.com/chongo/tech/comp/pwc/rh7.3.html

for setting it all up, culminating in the use of "camstream"
to test the drivers and camera, and all worked - I'm able
to capture images from the web cam.

However, when I try to capture these using vic, the camera and all
is recognized but, when I try to actually TRANSMIT via the Logitech
camera, I get a bunch of ioctl errors indicating incorrect parameters
being used.  Appended to this message is the output of running vic.

As you can see, vic finds both the Hauppauge and assigns to 
/dev/video0 and the Logitech and assigns to /dev/video1.
I have no problems transmitting with the Hauppage as device but then,
I select the Logitech USB cam as my device and then I try
to transmit - A thumbnail appears in vic, but with no image, then
I start getting all the ioctl invalid argument errors.  I've played
with virtually every button on vic, and I've even played around a lot
with arguments to the pwc module using documentation from

      http://www.smcc.demon.nl/webcam/install.html#param

However, it's been mostly trial and error with no real knowledge of
what I'm doing.  Is anybody familiar with these issues?  It appears to
me that vic is supplying arguments that either the kernel or, more
likely, one of the loadable modules (pwc) can't quite deal with????

I grabbed the sources for vic-2.8ucl-1.1.3 and find that all these
ioctl() calls are made in vic/video/grabber-video4linux.cpp  :



kluane:video% grep VIDIOCMCAPTURE *
grabber-video4linux.cpp:    if (-1 != ioctl(fd_, VIDIOCMCAPTURE, &vid_mmap)) {
grabber-video4linux.cpp:        if (-1 == ioctl(fd_, VIDIOCMCAPTURE, &gb_even))
grabber-video4linux.cpp:            perror("ioctl VIDIOCMCAPTURE even");
grabber-video4linux.cpp:        if (-1 == ioctl(fd_, VIDIOCMCAPTURE, &gb_odd))
grabber-video4linux.cpp:            perror("ioctl VIDIOCMCAPTURE odd");
grabber-video4linux.cpp:        if (-1 == ioctl(fd_, VIDIOCMCAPTURE,
kluane:video% grep VIDIOCSYNC *
grabber-video4linux.cpp:            if (-1 == ioctl(fd_, VIDIOCSYNC,
(sync_count%2) ? &one:&zero)) {
grabber-video4linux.cpp:                perror("ioctl VIDIOCSYNC");
grabber-video4linux.cpp:        if (-1 == ioctl(fd_, VIDIOCSYNC, (sync_count%2)
? &one:&zero))
grabber-video4linux.cpp:            perror("ioctl VIDIOCSYNC");


At this point, I don't know what direction to pursue - is the problem in the
fact that I haven't compiled the right options into my kernel that would
understand these ioctl() arguments?  Should linux kernel 2.4.18-3 understand
these calls if I compiled the right modules in (right now I'm using the
stock RH 7.3 kernel which already has pwc (Philips Web Cam) loadable modules,
and, again, it all works until I try to use vic.

Thanks,

Don




-- 
   Don Morton                   http://MRoCCS.cs.umt.edu/~morton/
   Department of Computer Science       The University of Montana
   Missoula, MT 59812 | Voice (406) 243-4975 | Fax (406) 243-5139


[root at kluane pwc]# vic -t 127 224.2.177.155/55524
V4l: trying /dev/video0... ok, BT878(Hauppauge (bt878))
V4l:   color; size: 48x32 => 640x576 (scales)
V4l:   ports: Television Composite1 S-Video Composite3
V4l:   depth=16, palette=yuv422P
V4l:  ==> format { 411 422 cif } size { small large cif } port { Composite1
Television S-Video Composite3 } type {ntsc auto pal secam}
V4l: trying /dev/video1... ok, Logitech QuickCam 3000 Pro
V4l:   color; size: 160x120 => 640x480
V4l:   ports: Webcam
V4l:   depth=24, palette=yuv420P
V4l:  ==> format { 411 422 cif } size { small large cif } port { Webcam } type
{ntsc auto pal secam}
V4l: trying /dev/video2... open: No such device
V4l: trying /dev/video3... open: No such device
Got grid width 3
invoke init fonts
in init_Fonts
in lnonwindows section
using colormodel truecolor/24
Got grid width 3
enable=
Did not find monitor list
Using monitor list {0 0 1024 768 main 0}
have monitor 'idx=0' '0 0 1024 768 main 0'
v4l: mmap()'ed buffer size = 0x410000    ### This is where I selected
Got pict, palette=13                     ### Hauppage capture card as device
Got pict again, palette=13
v4l: mmap()'ed buffer size = 0xe1000     ### This is where I selected     
Got pict, palette=15                     ### Logitech QuickCam 3000 Pro as
device
ioctl VIDIOCSPICT: Invalid argument
Got pict again, palette=15
ioctl VIDIOCMCAPTURE even: Invalid argument
ioctl VIDIOCMCAPTURE odd: Invalid argument
ioctl VIDIOCSYNC: Invalid argument
ioctl VIDIOMCAPTURE: Invalid argument
ioctl VIDIOCSYNC: Invalid argument
ioctl VIDIOMCAPTURE: Invalid argument
ioctl VIDIOCSYNC: Invalid argument
ioctl VIDIOMCAPTURE: Invalid argument
ioctl VIDIOCSYNC: Invalid argument
ioctl VIDIOMCAPTURE: Invalid argument
ioctl VIDIOCSYNC: Invalid argument
ioctl VIDIOMCAPTURE: Invalid argument
ioctl VIDIOCSYNC: Invalid argument
ioctl VIDIOMCAPTURE: Invalid argument