Watching video using VNC

Scott "The Axe" O'Bryan axeman "at" dwarf.org
Sat, 23 Mar 2002 15:34:42 +0000


Great minds think alike.  :)

-----Original Message-----
From: owner-vnc-list "at" uk.research.att.com
[mailto:owner-vnc-list "at" uk.research.att.com] On Behalf Of Jonathan Morton
Sent: Thursday, March 21, 2002 8:11 AM
To: vnc-list "at" uk.research.att.com
Subject: Re: Watching video using VNC

>When I use VNC to access the TV computer it works fine but the 
>window that shows the video signal is black.

That's because TV cards normally use an "overlay" mode to boost 
performance and free the CPU.  The TV signal never reaches the video 
card's framebuffer where VNC can see it, but is instead transmitted 
directly through the video card's RAMDAC via a small buffer and the 
PCI bus.

If your TV application supports it, turn off "overlay" mode.  You 
will probably see performance drop considerably, but it should allow 
VNC to see it.  However, also be advised that VNC is not optimised 
for transmitting video images, and will likely perform very poorly in 
this configuration.

-- 
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