Re: IP Cams - do they stream ?

["Juan Amador" <juane@xxxxxxx>]

Gareth - both Axis and Mobotix support video streaming.
However, you are going to have a problem with the upstream bandwidth.
If you stream using mpeg2 you need something like 1mbps bandwidth=20
(minimum).
We have not have a chance to test mpeg4 (which is supposed to be=20
more efficient) but i'd be surprised if it uses less than 0.5mbps=20
bandwidth.  So quite frankly, your best route is to use mjpeg at a=20
low frame rate - something like 10fps or 5fps should do it.  It will=20
be jerkey but at least it will be realtime.
Also, unless you use a remote server, every connection to the camera=20
will need its bandwidth - so two users connected will use twice as=20
much bandwidth.  Three will bring the netwoek down to its knees.
Axis (not sure about mobotix) has options to upload mjpeg/stream to=20
an isp server to which it can be broadcasted without the limitations=20
of the DSL link - but requires some work.

Good luck and happy wedding.

Juan

PS - Just a thought. Is the venue in the UK? If so, you MAY be able=20
to bargain with the ADSL provider for a 8mbps link (which has a=20
800Kbps upstream bandwidth) for a week or so - which will help=20
significantly.


--- In ukha_d@xxxxxxx, Gareth Cook <g@u...> wrote:
> A friend of mine is getting married - and he's asked if I can=20
setup a=20
> webcam for some family members abroad who cannot come. The venue=20
has a 1Mb=20
> DSL link (so a 256k upstream) and we're looking to have just 2=20
connections=20
> to the camera.=20
>=20
> Anyone here have an IP camera that supports realtime streaming -=20
rather=20
> than just a jpg every x seconds or so ? Wasnt sure if this was=20
feasable=20
> with the IP cams.
>=20
> G.
>=20
>  Gareth Cook
>  Tools and Process Architect
>  IBM SWG Sales - Lotus Park, Staines, TW18 3AG
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