Live Video Digitizer

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2 total messages Started by Pradeep Jain Sun, 10 Jan 1993 04:38

#206

Author: Pradeep Jain
Date: Sun, 10 Jan 1993 04:38

22 lines
1210 bytes

Hi all:

I want to connect multiple cameras to the SGI Live Video Digitizer.
Could someone tell me hwo I can do that? Apparantly, I can connect 
upto three different cameras in R G and B inputs of the LVD, and sync
of all four of them togather. Will it work?

Also, is it possible to transfer the contents of the digitizer directly 
into a file WITHOUT transferring them to the display buffer. It seems to
me that one has to transfer the contents to the display buffer and then
read the display buffer to the file - pretty annoying. I would appreciate 
hints/code if anyone has written. 

Thanks/

Pradeep

-- 

Pradeep Jain                              157 Advanced Technology Lab
Home:   (313) 761-3169                    The University of Michigan
Office: (313) 764-2138                    Ann Arbor, MI 48109

Re: Live Video Digitizer

#217

Author: Paul Spencer
Date: Mon, 11 Jan 1993 21:00

23 lines
1529 bytes

pradeep@engin.umich.edu (Pradeep Jain) says:
> 
> I want to connect multiple cameras to the SGI Live Video Digitizer.
> Could someone tell me hwo I can do that? Apparantly, I can connect 
> upto three different cameras in R G and B inputs of the LVD, and sync
> of all four of them togather. Will it work?

Yes, assuming they are monochrome (RS-170) cameras. You will have to 
synchronize the cameras together, and feed the common sync into the LVD.

> Also, is it possible to transfer the contents of the digitizer directly 
> into a file WITHOUT transferring them to the display buffer.

No. The LVD is attached directly to the graphics subsystem, not to the
system bus of the machine. If you need to go to memory without going 
through the graphics, you might try a VideoFramer card instead. It is
a VME-bus based board.

....paul

-- 
Paul Spencer                 Silicon Graphics Advanced Graphics Division
spencer@sgi.com                                Mountain View, California

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