means eXtensions Video: these extensions are
developed for XFree 4.x / X.org 6.x server.
With them you can realise great things like: using video hardware
acceleration capabilities (that makes video more fluid).
With Xv, YUY2 -> RGB conversion is made by hardware whereas, without
Xv, this conversion
is made by XdTV itself (with MMX instructions).
If you want to use all XdTV
functions, your graphic card must support Xv. Otherwise some of them
could not be usable (for example deinterlace filters). You can test it
with this command:
If your card doesn't support Xv you can launch XdTV without these
To use the Xv TV card support, you have to add load "v4l" into the