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'[ee]:video mixer'
2001\01\29@070349 by Ron, Jose Luis

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Good day to all
I am trying to build a video mixer and I have a problem...
Does anybody know how to sync. two PAL  video signals??
Thanks to all..
Jose L. Ron

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2001\01\29@141454 by Chris Carr

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Before an answer can be given, you need to give a description of the video
sources you intend applying to the mixer.

Regards

Chris

> Good day to all
> I am trying to build a video mixer and I have a problem...
> Does anybody know how to sync. two PAL  video signals??
> Thanks to all..
> Jose L. Ron
>

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2001\01\29@141843 by Robert Rolf

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Yes.

Add a frame sychronizer to one path using the other source as reference.

"Ron, Jose Luis" wrote:
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2001\01\30@081054 by Ron, Jose Luis

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Hi, i am trying to mix 2 PAL N video signal from 2 domestic camcorders.
Regards
Jose Luis


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2001\01\30@081314 by Ron, Jose Luis

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Hi, could you gime more details about frame sychronizer??
Thanks,
Jose luis
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2001\01\30@164041 by Robert Rolf

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Gime, gime, gime... Ever think of using a web search engine for youself?

Lots of choices out there. From $200US to $4500 for the top end all
digital in/out stuff. Also known as 'full frame Time Base Correctors'
(TBC)

http://www.dps.com/
www.dps.com/dpsweb.nsf/Products-Studio-TBCs?OpenPage
Their 'Personal TBC' series is good and relatively inexpensive.

http://www.novaglue.com/toc.html
http://www.novaglue.com/pdf/NBSync3.pdf

and many many many others.

Since you are using cameras as your sources, you only need one
FFTBC to synchronize your signals. There are also commercial editing
products aimed at home users. Get any newstand video magazine for
a good collection of adverts. (Digital Video, Computers & Video, and
many others. There are also several European magazines about desk top
or home video).

"Ron, Jose Luis" wrote:
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'[ee]:video mixer'
2001\02\01@161324 by Peter L. Peres
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>details

http://www.markertek.com

Make sure you are sitting down when you read the prices...

Peter

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2001\02\05@173114 by Gennette, Bruce

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If the video sources are in a studio they will all be synchronised to a
master sync generator and the problem doesn't exist.

If the sources are domestic recorders or cameras then you could have quite a
problem.  (Some cameras and top-of-the-line recorders have sync in/out
connectors and need an extra cable to supply the signal).

I would like to see someone tackle this problem in a small way (say up to 4
inputs) with something like a frame store for each input -
The analog signals from each input are digitized and written to dual ported
memory at whatever rate they come in.  Master sync-in (from the
first/compulsory input) is used to initiate sync and digital video out from
*ALL* of the frame stores.  Software does selective repositioning of video
streams for fades, wipes, picture-in-picture, zooms, etc.  Output is
digital, analog and RF.

I know that newer digital cameras and recorders do non-linear editing (not
in real time) so maybe the design could be expanded to allow mixed input
from analog and digital sources?

The uC, software, video digitizing and output amplifying are currently
cheap, but I suspect that enough dual ported memory for 4 video frames would
make the project a tad expensive.  So maybe an expansable design that starts
at 2 inputs would be more affordable?  Also the new HDTV standards would
require *LOTS* more memory and a faster processing rate.

See Maxim for most of the video processing and frame store chips.  Good
luck.

Bye.

> {Original Message removed}

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