Jeroen Vreeken wrote: > Serguei Miridonov wrote: > > > If you need to record from 4-8 inputs continuously, you will need 4-8 > > separate TV capture cards, I believe. However, if you wish just to take > > snapshots (say, 1-2 per second from all inputs), may be you can do it with > > DC10plus card which can be programmed to take signals from 4 composite inputs > > right of the box (however, you will need to add this functionality to the > > driver, and make S-Video cable for 2 composite inputs instead of Y/C). > > I don't think you would need to change the driver, if it has the > VIDIOSCHAN ioctl implemented you should be able to use this for > switching between the inputs. The driver has this ioctl but it is programmed only for 1 composite, 1 S-Video, and, recently, for 1 more internal composite inputs. To convert 1 S-Video to 2 composite, two more options need to be added in the driver. However, it is quite easy. > > > So, can someone tell me what I should be looking for, what is the > > > likleyhood of getting this to work etc? Also, does anyone have a source of > > > good video capture boards, fairly standard, maybe some with 2-4 inputs? > > > > Almost all have both composite and S-Video inputs. Some cards can be > > programmed so that S-Video input becomes two composite. Some cards, like > > DC10plus, have internal composite connector besides those ones on rear metal > > plate. So, in particular DC10plus can be used as 4-inputs card. If you have > > good soldering skills, may be you can get all available 6 composite inputs > > from it ;-). > > Virtualy unlimeted inputs could achieved by using frequency > multiplexing, > in other words play for cable company and modulate each video source on > a single cable (simple video modulators and some technical knowledge > will do) and use VIDIOCSFREQ for switching. That's nice solution for cards with a tuner! -- Serguei Miridonov CICESE, Research Center, CICESE, Optics Dept. Ensenada B.C., Mexico PO Box 434944 E-mail: mirsev@xxxxxxxxx San Diego, CA 92143-4944 FAX: +52 (6) 1750553 U.S.A.
