AppRTC URL parameter guide

This page contains URL parameters that control certain features in WebRTC and AppRTC.

How to

Use a query string to apply the parameters.
Example: https://apprtc.appspot.com/?r=123133&hd=true

Parameters

General

• r=roomName specify room name.
• hd=true/false toggles HD (1280x720).

Audio

• stereo=true/false toggles stereo audio input. (currently only sets the SDP, see issue x)
• opusfec=true/false toggles forward error correction for the OPUS codec.
• opusmaxpbr=bitrate sets the max send bitrate for audio.
• asc=codecname sets the specified codec as send audio codec.
• arc=codecname sets the specified codec as receive audio codec.
• asbr=bitrate limits the send bitrate to the specified value.
• arbr=bitrate limits the receive bitrate to the specified value

Video

• vsbr=bitrate limits the send bitrate.
• vrbr=bitrate limits the receive bitrate.
• vsibr=bitrate sets the initial send bitrate.

Network

• dtls=true/false toggles DTLS
• dscp=true/false toggles dscp
• ipv6=true/false toggles ipv6 candidates

Rendering

• ssr=true/false toggles stereoscopic rendering. Expects remote video to be a side-by-side view of two cameras' captures, which will each be fed to one eye.

GetUserMedia constraints

Constraints can also be passed directly as URL parameters simply by adding audio/video=<constraint1>,<constraint2>.
Examples:

• https://apprtc.appspot.com/?audio=echoCancellation=false
• https://apprtc.appspot.com/?video=maxWidth=1280, maxHeight=720