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multi-camera feed question

Posted: Thu Jun 16, 2005 6:15 pm
by scortez
This might be the wrong forum and/or the wrong product all together for my application. Please forgive me if it is. Anyways...I want to provide live video feed of my nightclub....but will want to have at least 4 cams to provide full coverage of the dance floor. Will ZM take the feeds from he 4 cams and create one single video? I then will take the mpeg/avi and stream it out via shoutcast. Any help will be greatly appreciated.

Posted: Fri Jun 17, 2005 1:10 pm
by zoneminder
Currently ZM does not combine feeds from several cameras into one stream, though this is something I plan in the future. The only other alternative would be to feed the video through a video combination box first so you only got one feed into ZM itself.

Phil

Posted: Fri Jun 17, 2005 1:25 pm
by scortez
I'm new to the whole networked video camera stuff....can ip based cams be run through a mux?

Posted: Fri Jun 17, 2005 4:42 pm
by jameswilson
not a traditional one no. a mux could split the screen then the output from the mux could be connected to an ip server ( or modify the camera)

Posted: Mon Jun 20, 2005 8:31 pm
by scortez
jameswilson: so what are ya thinking I might need? Thanks for all yous guys help btw

Personally...

Posted: Mon Jun 20, 2005 9:18 pm
by Baylink
I'd just buy a color quad-splitter, and feed *that* into the capture card.

Posted: Mon Jun 20, 2005 9:46 pm
by jameswilson
i agree any cheapy quad splitter will do just make sure u get a pal one or a ntsc depending on camera type

Posted: Tue Jun 21, 2005 1:17 pm
by scortez
right..I knew that...but how does it work if it's an ip cam?

It wouldn't.

Posted: Tue Jun 21, 2005 1:24 pm
by Baylink
You'd use regular video cameras, quad split them, then feed them into a capture card to webcast.

If you already *have* the webcams, then your problem is different, and I'm not sure you coulc press Zoneminder into that service anyway, since what you need is a *real* signal with all four cameras in it, and Zoneminder only produces a *web page that looks like that*.

Posted: Tue Jun 21, 2005 3:16 pm
by scortez
well crap...I will be getting ip cams from a friend and I only have 1 camcorder so that's not gonna do me no good. So bottom line yous guys don't think that this will work with ZM....any other suggestions?

Well, it depends on whether you need motion or not.

Posted: Tue Jun 21, 2005 3:55 pm
by Baylink
If a frame or two a second is good enough, you can use wget to retrieve a frame from each camera, and the netpbm tools or ImageMagick to stich them together. You'll then have a sequence of frames you can stream out along with the music.

Posted: Tue Jun 21, 2005 8:20 pm
by scortez
what's the deal with mjpgs any ways....do they have sound built in like a mpeg/avi or does that have to be merged later. I was thinking that each cam have focus for 30-45 secs and the go to the next cam and rotate the order

Posted: Tue Jun 21, 2005 8:38 pm
by jameswilson
i thought they were motion jpegs.

Posted: Tue Jun 21, 2005 9:53 pm
by Baylink
I'm not sure motion-JPEG isn't a misnomer in our environment, anyway. It's a very specific thing; a codec format used by, for example, the Miro DC cards (-10 and -30, at least), and what, for example, the Panasonic BL-c series cameras send is really just a bunch of normal JPEG's in sequence.

So, if the Original Poster is a coder, he might be able to write a customized zms that coalesces the inputs from four zmc's, and stream the output to whatever...