[Live-devel] RTP packet rate smoothing?

[Marian Durkovic]

Hi,

On Thu, Jan 19, 2006 at 12:34:47PM -0800, Ross Finlayson wrote:
> 
> >Any suggestions on to spread out the packets that make up a given
> >frame so they are uniformly distributed over the frame time
> >(durationInMicroSeconds).
> 
> A better (or at least easier) solution would be to ensure that 
> there's at least a minimum delay between successive outgoing packets, 
> so as to not exceed the overall bit rate of the network.

  I'd say this should be done automatically in LIVE555 libraries by computing
the inter-packet gap from the amount of data to sent in the current frame 
and inter-frame interval. Throwing the full frames onto the network will 
cause serious problems in all locations where the network bandwidth 
decreases and as such is generally unusable. Introducing a fixed minimum
delay between successive packets is no good solution either, since every
stream has different bandwidth requirements so there's no one size fits all. 


	With kind regards,

		M.

> 
> I.e., add the following statement just before the call to 
> "scheduleDelayedTask()" in "MultiFramedRTPSink.cpp":
>         if (uSecondsToGo < minInterPacketGap) uSecondsToGo = 
> minInterPacketGap;
> 
> Where "minInterPacketGap" is defined as:
>         minInterPacketGap = (8*1500*1000000)/B
> where B is the network bit rate (in bits per second).
> 
> E.g., for a 1 Mbps network, "minInterPacketGap" would be 8*1500 = 
> 12000 microseconds.
> 
> 
> 	Ross Finlayson
> 	Live Networks, Inc. (LIVE555.COM)
> 	<http://www.live555.com/>
> 
> _______________________________________________
> live-devel mailing list
> live-devel at lists.live555.com
> http://lists.live555.com/mailman/listinfo/live-devel


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