Using two video sources at once, not mixed

  • Thread starter Thread starter Peter B
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P

Peter B

Hi--I can't seem to find any good hints on how to do this and I am thinking
there is probably only a hardware solution. What I need to do is to have two
live video inputs coming in from analog sources--with one say being displayed
live on the screen while the other can be captured.

Example, we are video taping someone using a mobile phone. We also are
taking a video of their facial expressions. We could use Techsmith Morae to
capture our 'screen' + one Windows video source no problem, so I was thinking
we are able to route on source to play through VLC or something on the
screen, and one is natively captured by Morae as the 'default Windows video
device'. However, I can't think of a way that Windows would allow TWO video
sources to be plugged in (we are using A/D converters so these pop up as
devices--a Canopus ADVC box is one of them).

Thanks for any help you can give!

Peter
 
I should note that I realise I can use a video mixer to do a picture in
picture or some such thing instead--though we were hoping to try another
solution if possible.
 
=?Utf-8?B?UGV0ZXIgQg==?= <Peter (e-mail address removed)>
wrote in
Hi--I can't seem to find any good hints on how to do this and
I am thinking there is probably only a hardware solution. What
I need to do is to have two live video inputs coming in from
analog sources--with one say being displayed live on the
screen while the other can be captured.

Example, we are video taping someone using a mobile phone. We
also are taking a video of their facial expressions. We could
use Techsmith Morae to capture our 'screen' + one Windows
video source no problem, so I was thinking we are able to
route on source to play through VLC or something on the
screen, and one is natively captured by Morae as the 'default
Windows video device'. However, I can't think of a way that
Windows would allow TWO video sources to be plugged in (we are
using A/D converters so these pop up as devices--a Canopus
ADVC box is one of them).

Thanks for any help you can give!

Peter
Click to expand...

How's an ~$500 solution? Up to 4 of these OnAir USB2 capture
devices http://www.autumnwave.com/ can be attached to a modest
PC. They can all display, pause, and/or capture video
simultaneously. Perhaps one of the interfaces available will
suit your application? I suspect there are other, less expensive
capture devices which support multiple connections as well.
 
=?Utf-8?B?UGV0ZXIgQmVuZGE=?= <Peter
(e-mail address removed)> wrote in
Looks interesting--how would it work--have you tried one of
these?

Cheers

Peter
Click to expand...


I have only two units. The way the software works is to launch
an additional iteration of itself (by user request) to manage
each additional USB connection. Each iteration of the program
can be separately configured and will retain its configuration
after shutdown/restart.

The processor on which I use these most often is an AMD 3200 @ 2
gHz (single processor). Both can be displaying HD video while
capturing or time shifting and consume less than 50% CPU. In
"stealth" capture (where no video is displayed) the processes
barely put a ripple in the CPU usage.
 
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