Hello, First you can give linphone constraints bandwidth: use the connection type field in the property box, above the codec list. When set to 56k modem, the speex codec will automatically be configured to run at 8kbit/s. Second, to convert this codec bitrate to an IP bandwidth, you need to take in accound IP/UDP/RTP encapsulation : rtp has a header of 12 bytes udp is 8 - not sure ip is around 40 Speex packets are emitted every 20 ms. You 've got all the parameters of the problem now.
Simon Le Mercredi 12 Octobre 2005 17:32, Subhashis Roy a écrit : > Hi, > I am using 'linphone' which comes with Debian Sarge (version 1.0.1). > The party on the other side also uses the same version. > Given the bitrate of speex-8000 codec, I expect the maximum bitrate to > be about 24000. Since in the configuration file, all codec except the > above and '1015' are disabled, the average 'in+out' bytes/sec through > the otherwise calm network interfaces when both parties are speaking > should not exceed '3+3' kilobytes/sec. However, I find that it is > about 10 kilobytes/sec in practice (observed with 'xosview' and > 'ethereal'). > (Since this is going to increase the cost of VOIP I estimated, I am > worried about it.) > > Is this being observed by anybody ? > Any idea what could cause this, > or how to reduce it further while using broadband connection ? > > (I do not think using traffic shaper here will be a good option). > > Thanks in advance. > > Subhashis > > > _______________________________________________ > Linphone-users mailing list > [email protected] > http://lists.nongnu.org/mailman/listinfo/linphone-users _______________________________________________ Linphone-users mailing list [email protected] http://lists.nongnu.org/mailman/listinfo/linphone-users
