On 25/11/14 20:37, Simon Wise wrote:
On 25/11/14 16:46, Len Ovens wrote:
We had basically two hard switchers that each had one push button for
each
source available in the station. At the right side was a T handle
fader that
faded from one switch output to the other. That fade could be verying
amounts of
each signal (fade to black or whatever) or could be a wipe (a moving
pre-selected shaped key) or a chromakey (what it was called then).
What I have
seen in live stream SW has the switcher part, but not the fade or
keying except
being able to key in a box in a set place on the screen. The idea of
a wipe,
even timed so a physical fader is not needed, is not there. Maybe
someone can
suggest SW that has some of these things, but the only solution I saw
was with
HW. What SW does have, is the ability to sync unrelated video streams
at the
cost of added latency. We used to call it a frame storer.
"Pd with GEM via v4l did all the
openGL mixing"
Was going to mention Pd and GEM. Very surprised there is no mix or wipes
on the software you're using. Pretty easy to program!
A need for live keying, wipes and alpha overlays over several camera
sources ...
and nowhere near enough money to buy a big enough vision mixer ... was
the
motivation for a Linux based software vision mixer I put together in
2006. It
can all be done with several FLOSS solutions.
So did you ever release this solution you made to the public? ;-)
As I've mentioned before, for the more budget oriented (who are unlikely
to have cameras with full (HD)SDI output for use with a Blackmagic card
anyway!) there are the Happauge capture cards, which always had some
amount of Linux support and can generally be picked up for very little.
Dale.
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