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GVP MCP:mpc:amrwb-fmtp

 
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{{PubOption
 
{{PubOption
 
|hidden=false
 
|hidden=false
|default=octet-align=0 | octet-align=1
+
|default=octet-align=0 | octet-align=1
|valid=<parameter=value>&#91;|<parameter=value>&#93;*
+
|valid=<parameter=value>&#91;&#124;<parameter=value>&#93;*
 
|takeseffect=At start/restart
 
|takeseffect=At start/restart
 
|shortdesc=
 
|shortdesc=
  
 
Specifies the AMR-WB SDP RTP payload configurations offered and accepted by the MCP.
 
Specifies the AMR-WB SDP RTP payload configurations offered and accepted by the MCP.
Set to one or more fmtp text values separated by the '|' character.
+
Set to one or more fmtp text values separated by the '&#124;' character.
 
The fmtp text is the same as would appear in the SDP negotiation (see RFC 4867).
 
The fmtp text is the same as would appear in the SDP negotiation (see RFC 4867).
Each "|" separated value configures an AMR-WB payload type. There are two fmtp parameters
+
Each "&#124;" separated value configures an AMR-WB payload type. There are two fmtp parameters
 
that can be set for each payload type, octet-align and mode-set.
 
that can be set for each payload type, octet-align and mode-set.
 
<br /><br /> Setting octet-align=0 or octet-align=1 disables or enables octet align
 
<br /><br /> Setting octet-align=0 or octet-align=1 disables or enables octet align
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<br /><br /> For example, setting this parameter to "octet-align=1" enables one payload type
 
<br /><br /> For example, setting this parameter to "octet-align=1" enables one payload type
 
with octet aligned mode enabled and any mode allowed, and setting it to
 
with octet aligned mode enabled and any mode allowed, and setting it to
"octet-align=0 | octet-align=1" enables two payload types,
+
"octet-align=0 &#124; octet-align=1" enables two payload types,
 
one with bandwidth efficient mode enabled and any mode allowed, and one with octet aligned enabled
 
one with bandwidth efficient mode enabled and any mode allowed, and one with octet aligned enabled
 
and any mode allowed.
 
and any mode allowed.

Latest revision as of 14:15, December 17, 2021



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Published Option

amrwb.fmtp

Default Value: octet-align=0 | octet-align=1
Valid Values: <parameter=value>[|<parameter=value>]*
Changes Take Effect: At start/restart


Specifies the AMR-WB SDP RTP payload configurations offered and accepted by the MCP. Set to one or more fmtp text values separated by the '|' character. The fmtp text is the same as would appear in the SDP negotiation (see RFC 4867). Each "|" separated value configures an AMR-WB payload type. There are two fmtp parameters that can be set for each payload type, octet-align and mode-set.

Setting octet-align=0 or octet-align=1 disables or enables octet align mode for the payload.

Setting mode-set restricts the AMR-WB modes for the payload. For example, setting "mode-set=0,1" only allows modes 0 and 1. If mode-set is not set, all modes are allowed unless the mode-set is restricted by the remote end. Valid modes are inclusively 0 to 8.

For example, setting this parameter to "octet-align=1" enables one payload type with octet aligned mode enabled and any mode allowed, and setting it to "octet-align=0 | octet-align=1" enables two payload types, one with bandwidth efficient mode enabled and any mode allowed, and one with octet aligned enabled and any mode allowed.

Note, the mode-set parameter can cause transcoding to be required. For example, if a prompt to be played is in AMR-WB format mode 5, but only mode 0 is allowed in the payload, a transcoder will be invoked to transcode from AMR-WB mode 5 to AMR-WB mode 0.

Some AMR-WB implementations may specify a fmtp options that are not actually activated for the payload. To work around this, the mpc.amrwb.fmtp can be set to "*". For this setting, all fmtp content in an SDP offer will be ignored and "octet-align=0" will be returned in the SDP answer. Similarly, an offer for this configuration will be set to "octet-align=0", and all fmtp content in the answer will be ignored.

Draft Option

No draft option

This page was last edited on December 17, 2021, at 14:15.
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