Cant start a call with Audio only

[manurajmr1]

Currently unable to start a call without Video.

connection.session = {
audio: true
};

on starting a session as above still the video comes out. ca you please look into it or is it a known bug ?

[manurajmr1]

This did the trick

connection.mediaConstraints = {
    audio: {
        mandatory: {},
        optional: [{
            bandwidth: connection.bandwidth.audio * 8 * 1024 || 128 * 8 * 1024
        }]
    }
};