Grandtec Grand X Guard

These cards a relatively inexpensive by using one bt chip shared for all of the inputs. The upside is low cost, downside is performance.

• Using 1 source you get 25 fps
• Using 2 source you get 5 fps each (10 fps total)
• Using 4 sources you get 2.5 fps each (10 total)

...and so on. if you use more than 1 source, total FPS is 10/12

Please note that this will only show up as one video input (/dev/video0 for me). You will use channels of the input to access the multiple ports.

bttv supported card types

• 57 -> GrandTec 'Grand Video Capture' (Bt848) [4344:4142]
• 77 -> GrandTec Multi Capture Card (Bt878)
• 103 -> Grand X-Guard / Trust 814PCI [0304:0102]

GrandTec Grand X-Guard 4P

Autodetected correctly and confirmed working with bttv driver.

GrandTec Grand X-Guard 9P

Confirmed working under ZoneMinder 1.22 (probably earlier). bttv driver 0.9.17 incorrectly detects this as a card type 57. You need to edit modprobe.conf (see below), then do a rmmod bttv and modprobe bttv to get it to work correctly.

/etc/modprobe.conf

options bttv card=103 

I haven't had any problems testing with a single input but with each input added, the image gets brighter and more washed out. At 4 monitors, the image is no longer viewable with the default monitor brightness and contrast. The current theory is that providing a live connection to each input will resolve the problem.

GrandTec Grand X-Guard 16P

Needs the same configurations changes as the 9P card above.

Sources

davide post

Another davide post