Getting video working on my OpenSlug..

Seems pretty straightforward until the /dev/video device doesn’t appear!!

Followed the instructions here.. www.nslu2-linux.org/wiki/HowTo/AddUsbWebcam Then found I did not have lipjpeg, libpng and libzlib on my Slug. I copied the .so files (all of them) to my slug from the cross compile environment. Copying them to the folder /lib on the Slug. I was successful in creating; ov511.ko and videodev.ko When I tried to insmod them I had to specify their full path.

As follows;

insmod /lib/modules/2.6.16/kernel/drivers/media/video/videodev.ko
insmod /lib/modules/2.6.16/kernel/drivers/usb/media/ov511.ko

When I did the insmod on ov511.ko I received an error “Unknown symbol in module” So I followed the instructions here… 
www.nslu2-linux.org/wiki/OpenSlug/InstallWinTVPVRUSB2 (see bottom of page)

I figured that it would add alot of stuff I may never use, but it might be enough to create the /dev/video device. No luck…

After some more digging I found that by running “dmesg” the error was specifically “Unknown symbol v41_compat_ioctl32”

After some Google searching I found that I needed to execute… modprobe compat_ioctl32

So close (no error) but still no /dev/video

My camera is sitting quietly watching all of this with the little green light all aglow.. Grrrrr…. 😉

Looks like this command created the video0 device for me!!
mknod /dev/video0 c 81 0

This created the symbolic link from video0 to video

ln -s /dev/video0 /dev/video

Still when I run:

./vidcat -p y -s 640x480 > test.jpg

I get: Can't open device /dev/video
Try, try again… <sigh! >

AHA! I was missing the pwc driver… did ipkg install pwc and all is well!

The PWC module actually created the /dev/video0 device for me, I just had to create the symbolic link for vidcat to work.

# if driver modules are missing 
insmod /lib/modules/2.6.16/kernel/drivers/media/video/videodev.ko 
modprobe compat_ioctl32 
insmod /lib/modules/2.6.16/kernel/drivers/usb/media/ov511.ko 
insmod /lib/modules/2.6.16/kernel/drivers/usb/media/pwc.ko 
depmod -a 

# need to do this on each reboot... (unplug and re-plug camera first) 
ln -s /dev/video0 /dev/video 

# then this will work.. 
./vidcat -p y -s 640x480 > test.jpg