|8.3.1. Firewire video
This is full interface to the Libdc1394_control library. It allows you to capture video from a firewire(IEEE1394) video camera.
The libraries for firewire video devices are libdc1394 and libraw1394 . They sit on top of drivers raw1394 , video1394 , which in turn use ohci1394 and ieee1394 . Their relations are illustrated below:
coriander (GUI) | | libdc1394 (0.9.1) | | libraw1394/libraw1394-devel (0.9.0-6) | | raw1394 video1394 | |-------| | | ohci1394 |-----|-------| ieee1394Once the computer boots up, ohci1394 and ieee1394 modules should already be loaded in the memory. You may need to manually load in raw1394 and video1394 by:
/sbin/insmod raw1394 /sbin/insmod video1394
These modules should be available on systems like RedHat8.0 by default. RedHat also has RPM for libraw1394 and libraw1394-devel, you need both.
Libdc1394 is available in source code form, and can be accessed from http://sourceforge.net/projects/libdc1394/ . Compile and install it, then test it by running the grab_gray_image in the examples directory.(Make sure you have the read/write access right to /dev/video1394 and /dev/raw1394 ). If succeed, it dumps a gray image captured via the camera.
Coriander is a GUI program using libdc1394, available at: http://sourceforge.net/projects/coriander . It's a handy tool for live video capturing.
Start Lush, and type:
? (libload "video/libdc/libdc")
The grab_gray.lsh in the demos directory captures and dumps a gray image in the running directory.