Sorry for asking the question, I think I found the answer: I needed "libXv.a". I got it from "Xprog.tgz", from ftp://ftp.xfree86.org/pub/XFree86/4.0.2/binaries/Linux-ix86-glibc22/ It seems to link and work, or at least XvQueryExtension works. Peter K Peter Kaczowka wrote: > Please excuse my ignorance, but I hope someone has an answer: > > 1) What X library do I link with for Xvideo functions, for example > XvQueryExtension? > > 2) Where can I get this library? I normally use Debian. I believe I > have the "stable" xlib6g 3.3.6-11potato15 from Debian, but I think that > is XFree86 3.x libraries. (I didn't set this box up; it must have v4.0 > server but v3.x client libraries.) I tried installing that package from > Debian "unstable" and got the predictable result: X didn't run anymore > and I had to recreate my disk. Hopefully I can get just the .so I need > somehow, e.g. download just that file. Or maybe I can easily install > both v3.x and v4.x client libraries on the same machine. > > Thanks for your patience. At least these are different questions from > the usual "I just bought a WinTV card and it doesn't work" :-) > > Peter Kaczowka