- Full resolution screen capture directly from the VGA signal
- Posted by curious314159@yahoo.com on January 20th, 2008
Is there a device out there one can plug in the VGA cable of the PC
and capture at full frame rate (whatever the screen resolution is)
what is on the screen? Alternative is to put a very high res camera in
front of the display and record it, but I am looking for accurate
pixel by pixel capture of the screen (640x480 is not sufficient for my
application). If there is a software solution this, one that would
include also the video over-lays that normally don't show up in
standard windows screen capture.
Thanks a lot
-Ben
- Posted by manoki on February 15th, 2008
On Jan 20, 3:43*pm, curious314...@yahoo.com wrote:
Interesting question. I wondering the same thing. I'd like to
caputre it in software, not hardware, but here's what I've found.
http://www.epiphan.com/products/prod...hsGgodc3ZS 4g
I haven't purchased it or tried it yet, but if you do, please let me
know... ;-).
Ideally, I'd like to see the VGA out of my second (or 3rd) monitor,
show up as a web cam type of video source that I can grab w/ an
application I'm building.
Thanks for any further info.
-tj
- Posted by Paul on February 16th, 2008
manoki wrote:
If you look at the performance specs for the Epiphan box, it cannot
capture at a decent frame rate. But Epiphan was very good at salting
the search engine, because their box comes up first in a search.
See "update rate":
http://www.epiphan.com/products/product.php?ppid=27
This item is much more reasonably priced, but it appears to have
been hobbled on purpose. This device captures up to 1080i59.94,
but being interleaved, I don't know if you could get that from a
computer video card or not. In any case, you might not want to
(might flicker ?).
http://www.blackmagic-design.com/pro...ity/techspecs/
There is a clearer picture of the capture card, on page 4 here.
http://www.blackmagic-design.com/dow...yProMan-en.pdf
"Copy protected video
HDMI video sources may output copy protected encrypted video. By law
Intensity Pro is not allowed to capture from copy protected HDMI sources,
such as HDCP encrypted video and DVD players."
Roughly translated, the capture chip doesn't have HDCP keys loaded in it.
So while that card exists, and is cheaper than the Epiphan box, it
looks like it was deliberately designed not to work with computer
screens, as near as I can tell. If you know a way to put a computer
screen in 1080i59.94 mode, then maybe it would be worth purchasing.
Paul
- Posted by kateorlova@yahoo.com on February 27th, 2008
i know very good prog for capturing...its Screen VidShot!
for me its perfect tool!
very helpful and easy!has demo without timelimit!
i think its great!