Re: cameras on network

On Mar 16, 5:53 pm, "itsalan" <itsa...@xxxxxxxxx> wrote:
On Mar 16, 12:13 pm, "Mike Lowery" <selfs...@xxxxxxxxxxxxxxxx> wrote:





Correction: you may need to multiply by 30 if there's a chance everyone is going
to be viewing all cameras at once (which will no doubt crash your 100Mbps
network.)

"Mike Lowery" <selfs...@xxxxxxxxxxxxxxxx> wrote in message

news:OVXbMh9ZHHA.5044@xxxxxxxxxxxxxxxxxxxxxxx

If you know what bitrate you intend to use (check camera specs) you could
simulate the load using a packet generator or even an encoder like Windows
Media Encoder. Multiply by 10 and you'll have your network impact.

"BINZA@" <mark1.smith(remove this)@virgin.net> wrote in message
news:urG9Gv5ZHHA.5020@xxxxxxxxxxxxxxxxxxxxxxx
Thinking of using axis Mpeg4 cameras but i am wondering how i can see what
effect they have on local lan when switched on.
Alan any advise would be much appreciated.

"itsalan" <itsa...@xxxxxxxxx> wrote in message
news:1173983700.269755.85560@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
On Mar 15, 11:20 am, "BINZA@" <mark1.smith(remove this)@virgin.net>
wrote:
I have a 10\100 Lan which has over 30 pc connected to it.
My company are considering adding 10 ip cameras and monitoring the site and
factory, my question is can any one see any problems with this and possibly
point me in the direction of the best cameras to use.
My main concern is the traffic created by these cameras slowing network and
stopping users from working.
the cameras will be running all the time and video will be recorded for
future use.
If any one has any advise whatsoever it would be much appreciated.

Many thanks.

Depends what type of cameras you use, and if they are higher end
cameras, such as an axis, sony, or even an encoding box like verint,
then the bandwidth each camera uses depends on the video quality
settings. If it's an mpeg4 camera, you're probably going to use
anywhere from 512kb/sec to 4mb/s. If it's mpeg2, the bandwidth will
increase. Sorry if this is very broad, but i'm on my way out of the
door. I used to work for a company that provided video solutions like
this all the way up to the enterprise level. Let me know if you have
other questions and i'll try to help you out.

Alan- Hide quoted text -

- Show quoted text -

Mike, it depends on the camera model. I'm not up to speed on the
newest axis cameras, but some equipment that we used to deal with had
the capability to stream the video using multicast, so if that was the
case, then the network won't be impacted very heavily, even if
everyone is viewing at the same time or not.

Binza, you mentioned the mpeg4 cameras. The impact these will have on
your network will be directly related to the bitrate, which you will
have to decide. The way I help people decide this, is that it
somewhat depends on what framerate you are looking at. If you are
fine with 15fps, then around the area of 512kbps is a good ballpark.
If you want the framerate at 30fps, then I would suggest at least
1mbps. Any lower than these figures, your video quality will not look
very nice. It just takes a bit of playing around with to figure out
what you are looking for. If you aren't going to be archiving any of
this video or recording at all, I would say you would be very safe at
30fps in the 1mbps-2mbps range, which will give you pretty good
quality. I'm not certain, but you should be able to go all the way up
to 4mbps with these cameras, but that is probably overkill. If you
have 10 cameras, say at 1mbps, the theoretical maximum bandwidth these
cameras will use will be 10mbps, which should have very little, if
any, impact on your network's throughput.

I just noticed that you said you will be recording the video. In that
case, the bitrate/framerate you decide upon will be dependent on a
couple things, 1) how long you intend to keep the recorded video, and
2) how much disk space you have available to archive the video. Since
you're only using 10 cameras, I would still say that 30fps at 1mbps
should work out for you.

let me know if any other questions come up.- Hide quoted text -

- Show quoted text -

also, I forgot to add one thing. Make sure your switches are of
decent quality. In rare cases I've witnessed situations where lower
end switches could not handle the traffic and would get bottlenecked
from just 1 or 2 cameras

.

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