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Windows Server Forum / Windows Media Server / December 2003

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live broadcast buffering

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khalid - 19 Dec 2003 19:17 GMT
We configured windows media services 9 on Windows 2003
server for live audio broadcast. The audio from the encoder
is being transmitted at 64 Kb. Listeners are experiencing
excessive buffering. How can we overcome this buffering
issue. Can we limit the audio's Kb rate?

thanks,
Khalid
"Ravi Raman" - 19 Dec 2003 23:44 GMT
Khalid,

If your customers are using dial-up at 56kbps and your audio stream is
64kbps, you will see buffering as the bandwidth will be too much for dialup
to handle. Your encoding app needs to stream down at a lower bit rate to
match your target customers bandwidth (say at 32 or 48kbps).

Or if you have a mix of users using Broadband (like DSL) and dial-up, then
you can use the Multiple Bit rate encoding feature of the Series 9 encoder
(NOTE: Multiple bit rate audio is only supported for users listening on
Windows Media Player 9 , I suppose). Please check the encoder documentation
to know more about Multiple bitrate encoding.

Hope this helps.

Ravi
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This posting is provided "AS IS" with no warranties, and confers no rights
Khalid - 20 Dec 2003 19:58 GMT
>-----Original Message-----
>Khalid,
[quoted text clipped - 15 lines]
>--
>This posting is provided "AS IS" with no warranties, and confers no rights.

Ravi,

Thank you for the info but it doesn't really solve my
issue. I have no control over the encoder but I have
control over the windows media services, server. Is there
any way for  me to control the bit rate from the server side?

Thanks,
Khalid
"Ravi Raman" - 22 Dec 2003 19:37 GMT
I don't know if there is any app that can take a 64kbps stream live and
encode it at a lower bitrate (to say 32kbps) and then stream it like an
encoder would do. If there is such an app, then you can use that app and
use the server along with it. The server does not "transcode" to a lower
bit rate stream by itself. If there are multiple bit rate streams, it will
be able to select the right bitrate (among the available bitrates) that can
be sent to the client.

Other than this, I don't have any other ideas on how to get this done. Hope
someone else in this list can help you with this.

Thx,
Ravi
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This posting is provided "AS IS" with no warranties, and confers no rights
Brian - 22 Dec 2003 22:08 GMT
I've done this by using a server connecting to the windows media 64k stream
with windows media player, playing it then reencoding it at a lower bit rate
with windows media encoder and publishing it to the local windows media
services.

Nasty! But it works!! :)

Brian.

http://www.powerfm.org

> I don't know if there is any app that can take a 64kbps stream live and
> encode it at a lower bitrate (to say 32kbps) and then stream it like an
[quoted text clipped - 11 lines]
> --
> This posting is provided "AS IS" with no warranties, and confers no rights.
 
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