From: "David P. Reed" <[EMAIL PROTECTED]>
Subject: Re: supressing bandwidth
If you are really trying to emulate a modem over an ISP dialup, you need to
control not just the bit rate, but also the various jitter and delay
sources in the path (of which there are many, ranging from PPP protocol to
buffering in various routers and modem banks, and modem compression,
etc.). All of these will affect the quality. Simulating the data flow
over real modems accurately is pretty hard, and can't be done by any proxy
I know of.
On the other hand, if you just tell your real player that it should use
28.8 or 56 streams in its options, you'll see the "best" quality achievable
over such modem links, given encoding and Real Server capacity. Of course
the worst will be much worse, and typical quality will depend on how well
provisioned your ISP is with connectivity into the public internet.
I'd suggest sticking with a modem for tests. Compared to the alternatives,
it's pretty easy and more likely to give you a useful result.
At 08:55 AM 11/22/99 -0800, you wrote:
>From: "Yvan Gagnon" <[EMAIL PROTECTED]>
>Subject: supressing bandwidth
>
>Does anyone here know if there's a way to supress bandwidth over a network
>connection (proxy) using some kind of special program or utility?
>
>I'm encoding multiple bitrate realaudio and realvideo files, and I'd like to
>test the lower bitrate streams without haveing to install a 28.8k modem.
>
>Ideally, I'd like to find a way to emulate both 28.8k and 56k connections
>over a proxy. Is this possible to do? If so, how?
>
>thanks,
>-- [EMAIL PROTECTED]
>
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