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Video over network

Posted on 2005-03-21
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Hello,

I have a council that would like to begin broadcasting their meetings over our city's public access television station.  We currently have the equipment in place to broadcast out to the TV channel in another building a block away, where other programming is broadcast.  The two buildings are networked together with 802.11b Cisco briding equipment.  Is there a way I can take feed from a camera in building one, send the signal over to the building with the broadcast equipment so I can have the feed on the cable tv station?  (i.e., aret there network ready-cameras available, etc.)

Thanks for any assistance.
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Question by:bkesting
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7 Comments
 
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Callandor earned 500 total points
ID: 13593508
You can, if you stick to black and white and use a low resolution.  You are constrained by the 802.11b bandwidth, which is theoretically 11Mbits/sec.  Calculate the number of pixels you have, multiply by the color depth (8 bits for black and white), and multiply that by the number of frames per second.  Allow for 50% of theoretical maximum, and you get something a little over 160 x 120 black and white at 30 fps.  That doesn't sound very watchable.
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LVL 69

Expert Comment

by:Callandor
ID: 13593542
This one uses higher bandwidth 802.11g (54Mbits/sec), and can only manage 320 x 240 color at 3 fps: http://www.trackercam.com/TCamWeb/wireless.htm

Video is a high bandwidth endeavor.
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Author Comment

by:bkesting
ID: 13593555
No it doesn't..............

I am not opposed to moving the broadcast equipment to the building where the council meetings will take place.  If I streamed the meeting into a webcast then played that webcast over a computer hooked to the broadcast equipment in the other building, do you think that might be a viable option?

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LVL 69

Expert Comment

by:Callandor
ID: 13593634
As long as you don't have to go through the 802.11b bottleneck, you will get better results.  Can you run an ethernet cable between buildings, preferably cat 6 or 5e so that you can use gigabit?  That will give you the best results.
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Author Comment

by:bkesting
ID: 13594294
I would like to do that, but unfortunately there is no way to run the wire between the buildings......that is why they are networked with wireless.
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LVL 69

Expert Comment

by:Callandor
ID: 13594312
Then you are going to still have the same constraint as in my first post.  There's no way to get extra bandwidth from nothing.
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Author Comment

by:bkesting
ID: 13594325
Ok, well thanks for the input, I at least now know where I need to look.
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