From: Dennis Johnstone <[EMAIL PROTECTED]>
Subject: RE: Audio buffering on live broadcasts
There's not a lot you can do about the time gap between your real-time
output and your live webcast. Here at Radio 5 Live, we simulcast on radio
and the internet but the webcast can be delayed by as much as a minute
compared with the radio output.
This is partly down to the longer signal path between studio and encoding PC
compared with the path between studio and radio transmitter, partly down to
the encoding process itself (you've put an extra stage of processing into
the signal path), and partly down to the number of hops the streaming file
has to take to reach the playback computer.
I've had two computers side by side, one using a dial-up connection and the
other using T3, with both connected to the same live streaming file. The
dial-up connection was 12 seconds behind the radio output while the T3
connection was 29 seconds behind. The reason was that the dial-up connection
was taking a different and shorter route over the net to that used by the T3
connection.
You can shorten the signal path between studio and output to save some time
and play around with different codecs to see if some process faster than
others, but ultimately you will have to accept that there will be a time gap
between the RealMedia stream and the real-time output.
Of course, some of your audience will send you emails saying that you're not
really live or that you're delaying the output so as to censor it, but most
will accept the above explanation - after all, they will have witnessed time
delays when watching live satellite link-ups on the television news.
- - - - - - - - - - - - - - - - - - - - -
Dennis Johnstone
Website editor
BBC Radio 5 Live
http://www.bbc.co.uk/radio5live/
email: [EMAIL PROTECTED]
- - - - - - - - - - - - - - - - - - - - -
> -----Original Message-----
> From: RealForum [SMTP:[EMAIL PROTECTED]]
> Sent: Friday, October 15, 1999 1:20 AM
> Subject: Audio buffering on live broadcasts
>
> From: "Hillis.Michael.NWASTA.PuertoRico" <[EMAIL PROTECTED]>
> Subject: Audio buffering on live broadcasts
>
> I'm using RealServer and RealProducer to broadcast a live range audio feed
> to RealPlayer clients. I noticed, and so have the users, that there is a
> fifteen second delay between real-time audio and what comes out
> RealPlayer.
> I need to reduce the delay, even if it means a hit on quality. What
> adjustments are available for this?
>
> Michael Hillis [EMAIL PROTECTED]
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