[mythtv] Relationship of XVideo to V4L

[Joseph A. Caputo]

> -----Original Message-----
> From: apache [mailto:apache at albert.homedns.org]On Behalf Of Kristof
> Pelckmans
> Sent: Wednesday, July 09, 2003 3:08 AM
> To: Development of mythtv; Joseph A. Caputo
> Subject: RE: [mythtv] Relationship of XVideo to V4L
>

[snip]

> However, I still have one question : I saw the following line in
> a XF86Config
> file :
>
> Load "v4l"
>
> What does this do ? As far as I understand, the v4l driver is
> loaded as a kernel
> module, so why this extra line ? In the XFree86 documentation
> they speak about
> 'server extension modules', so is this a special X-version of v4l
> ? I found
> that commenting it out does not seem to make a difference.

Hmmm, I'd never noticed the "v4l" XFree module before... I did some digging
on the xfree86.org and came up with this:

http://www.xfree86.org/4.2.0/v4l.4.html

It seems that this would not be needed for Myth, but rather for applications
like Xawtv, which basically connect the V4L card to an Xv port.  My
interpretation is that the 'v4l' module is simply a convenience mechanism to
tie V4L input to Xv output.

-JAC