...

SDP parameters replacement allows to rise video streeam published bitrate. To do this, SDP parameter 'a' must be replaced by this template when publishing H264 stream:

a=fmtp:(.*) (.*)

...

In this case browser will try to keep bitrate in limits from 3000 to 7000 kbps when publishing a stream.This feature is available in Chrome browser only.

When publishing VP8 stream, SDP parameter 'a' must be replaced by this template

a=rtpmap:(.*) VP8/90000\r\n

to

a=rtpmap:$1 VP8/90000\r\na=fmtp:$1 x-google-min-bitrate=3000;x-google-max-bitrate=7000\r\n

This feature is available in Chrome browser only.

Bandwidth management

SDP parameters replacement allows to set bandwidth for stream publishhed. To do this, SDP parameter 'c' must be replaced by this template when publishing stream

c=IN (.*)\r\n

to

c=IN $1\r\nb=AS:10000\r\n

Setting up codecs

When publishing the stream, there is a possibility to eliminate from WebRTC SDP codecs that should not be used to publish the given stream, for example:

...