A tweaked version of stanza.io to fix a problem where call answer fails when calling audio only from firefox to chrome and throws this error:
Failed to set remote answer sdp: Called with SDP without ice-ufrag and ice-pwd.
i've solved the issue by including the npm package sdpparser in the client js (of stanza.io) then building it again,
and in stanza.io.bundle.js ive tweaked the PeerConnection.prototype.handleAnswer to remove the media fingerprint of the video if call is audio only.
you may see this thread if you need more explanation on the issue: otalk/jingle.js#24