Author: brian Date: Sun Feb 10 00:07:29 2008 New Revision: 7575 Modified: freeswitch/trunk/conf/vars.xml Log: document the codec options better in vars.xml Modified: freeswitch/trunk/conf/vars.xml ============================================================================== --- freeswitch/trunk/conf/vars.xml (original) +++ freeswitch/trunk/conf/vars.xml Sun Feb 10 00:07:29 2008 @@ -16,6 +16,52 @@ containing the "subscriptions" table. used by: dingaling.conf.xml enum.conf.xml --> + <!-- + Examples of codec options: (module must be compiled and loaded) + + codecname[@8000h|16000h|32000h[@XXi]] + + XX is the frame size must be multples allowed for the codec + FreeSWITCH can support 10-120ms on some codecs. + We do not support exceeding the MTU of the RTP packet. + + + iLBC@30i - iLBC using mode=30 which will win in all cases. + DVI4@8000h@20i - IMA ADPCM 8kHz using 20ms ptime. (multiples of 10) + DVI4@16000h@40i - IMA ADPCM 16kHz using 40ms ptime. (multiples of 10) + speex@8000h@20i - Speex 8kHz using 20ms ptime. + speex@16000h@20i - Speex 16kHz using 20ms ptime. + speex@32000h@20i - Speex 32kHz using 20ms ptime. + GSM@40i - GSM 8kHz using 40ms ptime. (GSM is done in multiples of 20, Default is 20ms) + G722 - G722 16kHz using default 20ms ptime. (multiples of 10) + PCMU - G711 8kHz ulaw using default 20ms ptime. (multiples of 10) + PCMA - G711 8kHz alaw using default 20ms ptime. (multiples of 10) + G726-16 - G726 16kbit adpcm using default 20ms ptime. (multiples of 10) + G726-24 - G726 24kbit adpcm using default 20ms ptime. (multiples of 10) + G726-32 - G726 32kbit adpcm using default 20ms ptime. (multiples of 10) + G726-40 - G726 40kbit adpcm using default 20ms ptime. (multiples of 10) + AAL2-G726-16 - Same as G726-16 but using AAL2 packing. (multiples of 10) + AAL2-G726-24 - Same as G726-24 but using AAL2 packing. (multiples of 10) + AAL2-G726-32 - Same as G726-32 but using AAL2 packing. (multiples of 10) + AAL2-G726-40 - Same as G726-40 but using AAL2 packing. (multiples of 10) + LPC - LPC10 using 90ms ptime (only supports 90ms at this time in FreeSWITCH) + L16 - L16 isn't recommended for VoIP but you can do it. L16 can exceed the MTU rather quickly. + + These are the passthru audio codecs: + + G729 - G729 in passthru mode. (mod_g729) + G723 - G723.1 in passthru mode. (mod_g723_1) + AMR - AMR in passthru mode. (mod_amr) + + These are the passthru video codecs: (mod_h26x) + + H261 - H.261 Video + H263 - H.263 Video + H263-1998 - H.263-1998 Video + H263-2000 - H.263-2000 Video + H264 - H.264 Video + + --> <X-PRE-PROCESS cmd="set" data="global_codec_prefs=G722,PCMU@20i,PCMA@20i"/> <X-PRE-PROCESS cmd="set" data="outbound_codec_prefs=PCMU@20i,PCMA@20i"/> <X-PRE-PROCESS cmd="set" data="xmpp_client_profile=xmppc"/>