[Speex-dev] Single frame or multiple frame inside rtp packet?
jean-marc.valin at usherbrooke.ca
Thu Sep 7 02:47:36 PDT 2006
> I have created a voip application using speex. My
> internet line is 64Kbps.
> I`m using narrow band mode, 8000 bitrate, 20ms of
> 8000Khz sampling rate, no buffering, no preprocessing,
> just set bitrate and go.
> When i send single frame inside rtp the sound was not
> good, choppy and noisy. But when i pack around 8 frame
> inside rtp packet, the sound was better.
Most likely reason is that it's not related to bandwidth, but that you
probably screwed up either the network or the audio buffering.
> My question are:
> 1. Which one is best practice?
It's usually best to use one (or at most two) frames per packet because
> 2. How to correctly measure bandwidth usage of speex
The overall bandwidth using RTP is:
speex_bitrate + 16kbps/frames_per_packet
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