Hi Jamie,
The only experience I had with 2 simultaneous live feeds was with
Hauppage PCI cards (analog signal in @ 640 x 480). Otherwise, DV input
works in GEM but I only had one available port. With multiple live
feeds or heavy video manipulation, you have to expect decreased image
quality and latency, how much of it depends on your budget. It would be
cool to benchmark what the best speed/resolution available would be once
you build it.
Another solution is for the users to realize that there is intrinsic
value in latency and glitches (both aesthetic and political) and find a
way to somehow incorporate it in the work. There is a good text on this
by one of the recent subscribers to the list.
Cheers,
Alexandre
Le 10-10-03 04:37, Jamie Bullock a écrit :
Thanks Alexandre and Simon,
It sounds like technically the task is a trivial one, thanks for the tips.
In terms of latency, I get the impression this is a function of the video
capture method used...
@Simon, can you tell me which PCI card you are using?
This project is to port a piece originally done with Max/Jitter to a Pd-based
system. The main complaints they had were video quality and latency, so those
are problems we need to solve.
All best,
Jamie
--
http://www.jamiebullock.com
On 2 Oct 2010, at 16:13, Alexandre Castonguay wrote:
Hi Jamie,
I think it's easy to do with any of the externals handling video but here is a
tutorial :
http://en.flossmanuals.net/PureData/GEMVideoMixer
I would simply add a [gemhead] -> [text2d] chain to it.
Cheers,
Alexandre
Le 10-10-02 09:43, Jamie Bullock a écrit :
Hi,
Does anyone know if it is possible with Pd+externals to mix 2 video streams
(with the ability to crossfade between), and add a textual overlay on the mixed
image (downstream keying)?
Is this possible with Gem? Gridflow?
If this is indeed possible, what sort of latency could I achieve from input to
output?
Platform isn't an issue, I could use Linux, Mac OS or Windows -- whichever
gives the best performance.
Any advice appreciated.
Jamie
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