Kurento WebRTC not recording unless both audio and video streams are present

Question

Basically subj. I am using Kurento-Utils for JS. That topic has been discussed for the case of lower-level work, but at this point in project, it is too late to go switch approach :(

When i stream webcam with audio it is recorded nicely into a .webm file. But, how do i stream audio only, or video only? An attempt results in file being of 0 size with no error messages.

Is there any sample code for Kurento-utils/js which would demonstrate that use case?

Answer 1

You need to provide the appropriate MediaType when instantiating the recorder, and connecting the elements.

pipeline.create('RecorderEndpoint', {uri: filepath,mediaProfile:'WEBM_AUDIO_ONLY'}, 
            function (error, recorder) {
                webrtcEp.connect(recorder,'AUDIO', function (err) {
                    recorder.record();
                    console.log("recording started ...");
                });
            });