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- From: martins@hpl.hp.com (Henrique Martins)
- Subject: Re: HP VideoLive card
- Sender: news@hplabs.hpl.hp.com (HPL News Posting Service)
- Message-ID: <MARTINS.92Nov20071930@hpl.hp.com>
- In-Reply-To: ikeken@md.tsukuba.ac.jp's message of 20 Nov 92 07:05:22 GMT
- Date: Fri, 20 Nov 1992 15:19:30 GMT
- References: <3452@shark.md.tsukuba.ac.jp>
- Organization: Hewlett-Packard Laboratories, Palo Alto, CA
- Lines: 44
-
- In article <3452@shark.md.tsukuba.ac.jp> ikeken@md.tsukuba.ac.jp (Ken-ichi Ikebukuro) writes:
-
- > Recently I got HP VideoLive card for reading video signal into
- > my hp730. And I'm very much surprised that there is no information
- > or library to control the VideoLive card directly from c or other
- > programming language. ...
-
- > My purpose is to make a image processing program which can read
- > a video signal directly from the video camera. So the enclosed
- > simple program is quit insufficient and the information to control
- > the LiveVideo card is necessary.
-
- #include <std/disclaimer>
-
- One way of doing what you want is to use the X Window System Video
- Extension.
-
- If you got a VideoLive card from HP, are running HP-UX 8.07, and
- the installation process replaced your X server with one that allows the
- VideoLive card to run, you got an X server with the video extensions. (At
- 9.0 the X server will have this extensions by default.)
-
- The VideoLive card installation process should also have given you the
- video extension library, called libXv.a, and placed it in /usr/lib/X11.
-
- I think (and don't know why) the installation process doesn't give you
- the include files and man pages for the Video Extension call (I don't know
- whether they will come in 9.0 or not). However these can be ftp'ed from
- MIT. I had to do it.
-
- It should then be quite simple to figure out how to use the video
- extension calls. (The proof is that I did it :-)) I guess (form memory)
- that it boils down to a XQueryAdaptor, XPutSill, and XGetImage calling
- sequence.
-
- Note however that this is probably a little bit slow, as the image has to
- go from the X server to your process, all 640x480x4 bytes of it. There are
- other ways to get to the card and control it, but I'm not sure why HP
- and/or RasterOps aren't giving them away, and I'm not privileged with that
- type of information.
-
- -- Henrique (martins@hpl.hp.com)
-
-
-