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Posted by Esther & Fester Bestertester on October 19, 2007, 6:22 pm
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Is there an adapter that will plug into a 10/100 UTP ethernet network and
take NTSC video as an input. My goal is to utilize some existing security
cameras that output NTSC video.
Audio input, too, would be an added bonus.
I know that there already network cams, but I'd like to not bin these nice
surplus cameras.
Thanks!
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Posted by Gerard Bok on October 20, 2007, 12:21 pm
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On Fri, 19 Oct 2007 15:22:32 -0700, Esther & Fester Bestertester
>Is there an adapter that will plug into a 10/100 UTP ethernet network and
>take NTSC video as an input. My goal is to utilize some existing security
>cameras that output NTSC video.
>
>Audio input, too, would be an added bonus.
>
>I know that there already network cams, but I'd like to not bin these nice
>surplus cameras.
Not sure what you mean.
If you want to use CAT5 ethernet wiring to transport NTSC video
signal: yes, that can be done.
You can take the 'royal route', which is to buy devices called
'balun' to fix on both sides of the cable.
But in practice, even plain CAT5 cable works remakably well.
(I have tried 15 meters. No indication that that poses a limit.
Just my cable wasn't any longer :-)
Make sure that you connect both the video signal and the audio
signal over a 'pair'.
--
Kind regards,
Gerard Bok
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Posted by Albert Manfredi on October 21, 2007, 6:10 pm
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> On Fri, 19 Oct 2007 15:22:32 -0700, Esther & Fester Bestertester
>
> >Is there an adapter that will plug into a 10/100 UTP ethernet network and
> >take NTSC video as an input. My goal is to utilize some existing security
> >cameras that output NTSC video.
>
> >Audio input, too, would be an added bonus.
>
> >I know that there already network cams, but I'd like to not bin these nice
> >surplus cameras.
>
> Not sure what you mean.
> If you want to use CAT5 ethernet wiring to transport NTSC video
> signal: yes, that can be done.
> You can take the 'royal route', which is to buy devices called
> 'balun' to fix on both sides of the cable.
>
> But in practice, even plain CAT5 cable works remakably well.
> (I have tried 15 meters. No indication that that poses a limit.
> Just my cable wasn't any longer :-)
> Make sure that you connect both the video signal and the audio
> signal over a 'pair'.
I don't think that's what the original poster wanted, because it would
not result in the NTSC video being transferred as TCP/IP (or UDP/IP).
It would simply be analog NTSC over, for example, a twisted pair
cat-5e cable.
There are adapter cards for PCs, however, that will accept NTSC as
well as ATSC inputs, and will then allow the PC with its IP stack to
transfer the resulting MPEG frames over an IP network.
Bert
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Posted by Gerard Bok on October 22, 2007, 6:48 am
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>On Oct 20, 12:21 pm, bok...@zonnet.nl (Gerard Bok) wrote:
>> On Fri, 19 Oct 2007 15:22:32 -0700, Esther & Fester Bestertester
>>
>> >Is there an adapter that will plug into a 10/100 UTP ethernet network and
>> >take NTSC video as an input. My goal is to utilize some existing security
>> >cameras that output NTSC video.
>>
>> >Audio input, too, would be an added bonus.
>>
>> >I know that there already network cams, but I'd like to not bin these nice
>> >surplus cameras.
>>
>> Not sure what you mean.
>> If you want to use CAT5 ethernet wiring to transport NTSC video
>> signal: yes, that can be done.
>> But in practice, even plain CAT5 cable works remakably well.
>I don't think that's what the original poster wanted, because it would
>not result in the NTSC video being transferred as TCP/IP (or UDP/IP).
>It would simply be analog NTSC over, for example, a twisted pair
>cat-5e cable.
Yes, I realised that.
But using the cable for analog transfer is the only viable option
in OP's case imho.
If he wants to transfer NTSC over IP he should buy a 'webcam'
device. That's typically a lot cheaper than buying a box that
takes analog NTSC, MPEGs it, and transmits it as packets :-)
--
Kind regards,
Gerard Bok
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Posted by Tomi Holger Engdahl on October 22, 2007, 7:24 am
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> Is there an adapter that will plug into a 10/100 UTP ethernet network and
> take NTSC video as an input. My goal is to utilize some existing security
> cameras that output NTSC video.
>
> Audio input, too, would be an added bonus.
>
> I know that there already network cams, but I'd like to not bin these nice
> surplus cameras.
>
> Thanks!
If you want to convert NTSC to video tream tha can be viewed
with a computer here are some links:
MOXA Video Networking Products
http://www.moxa.com/product/Video_Networking_Products.htm
AXIS Video servers
http://www.axis.com/products/video/video_server/productguide_4port.htm
Network Video Server
http://www.svideo.com/nvs100.html
VLC - the cross-platform media player and streaming server
http://www.videolan.org/vlc/
If you want just to transport video signals (NTSC in, NTSC out)
through UTOP wiring designed to carry 10/100 UTP ethernet,
then there are balun adapters that can convert
NTSC video coaxial cabling to UTP wiring on one end and
back to ciaxial cable on other end. Those will work
when you have direct cable connection (no active devices
between the outlets) and reasonable distance (few hundred meters).
More information on this can be found hare:
http://www.epanorama.net/links/wire_av.html#utpvideo
--
Tomi Engdahl (http://www.iki.fi/then/)
Take a look at my electronics web links and documents at
http://www.epanorama.net/
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