[Fiware-creatifi-coaching] [FIWARE-JIRA] (HELC-1298) [CreatiFI Benelux Hub] Screencast stream not being recorded in Kurento GE

[Silvio Cretti (JIRA)]

Dear CreatiFI accelerator,
following the Kurento owner reply:

**********************************
Hi,
this issue has been also asked in kurento mailing list:
https://groups.google.com/forum/#!topic/kurento/SsuFWCXX0EY
We need the logs of kurento mediaserver to see is there is an error that is not reported to the application.
Additionally, it seems that only video is being recorded but the profile selected is the default one that expects audio and video to be recorded that could be the reason of the file stay with a 0 size. Try setting mediaProfile constructor parameter to WEBM_VIDEO_ONLY. This way recorder only expects video and does not wait for audio to arrive.
It is also very recommendable to stop recorder before releasing it. Most probably it can work without calling stop, but it's safer to always call stop.

The problem is already solved, as you can see in Kurento mailing list:
https://groups.google.com/forum/#!topic/kurento/SsuFWCXX0EY

**********************************

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Silvio Cretti created HELC-1298:
-----------------------------------

             Summary: [Fiware-creatifi-coaching] [CreatiFI Benelux Hub] Screencast stream not being recorded in Kurento GE
                 Key: HELC-1298
                 URL: https://jira.fiware.org/browse/HELC-1298
             Project: Help-Coaches-Desk
          Issue Type: extRequest
          Components: CreatiFI
            Reporter: FW External User
            Assignee: Silvio Cretti


Dear FIWARE coach,
we forward you a support request received from a CreatiFI applicant we are
not able to solve.
Please let us know if you need direct contact with the submitter.
Thanks.

******************************

Hello,

We are trying to record a screencast.

The screencast is sent to Kurento that is able to send it back to the
client.
But the stream is not recorded, the file is created but stays at zero bytes.

Actually, we have been recording files on v5.1.0 without any problems.
Now we moved to v6.4.0 we changed the code accordingly but now the
screencast stream is not recorded any more.

Project is blocked because of this, we need help urgently!

This is the code we use to stream and record:

    var screencastConstraints = {
        audio: false,
        video: {
            mandatory: {
                maxWidth: 640,
                maxHeight: 480,
                maxFrameRate: 15,
                minFrameRate: 1
            }
        }
    };

    this.startScreencast = function () {
        var screencastInput = document.getElementById('screencastInput')
        var options = {
           localVideo: null,
           remoteVideo: screencastInput,
           mediaConstraints: screencastConstraints,
           configuration :  { iceServers :  [
                {"url":"turn:numb.viagenie.ca:3478",
                 "username":"<username>",
                 "credential":"<credential>"}
                ] }
        };
        var pipeline = self.pipeline;

        if (pipeline != null) {
            // self.webRtcPeerScreencast =
kurentoUtils.WebRtcPeer.startSendOnly(null, onOffer, onError,
screencastConstraints);
            self.webRtcPeerScreencast =
kurentoUtils.WebRtcPeer.WebRtcPeerSendrecv(options, function(error)
            {
                if(error) return onError(error);

                this.generateOffer(onOffer);
            });

        } else {
            $log.debug('Pipeline == null');
        }

        function onError(error) {
            $log.log(error);
        }

        function onOffer(error, offer) {
            $log.log("Offer...");
            var elements =
                [
                  {type: 'RecorderEndpoint', params: {uri :
file_uri_path + file_uri_screencast + sessionID + file_uri_format}},
                  {type: 'WebRtcEndpoint', params: {}}
                ];

                kurentoClient(ws_uri, function (error, client) {
                    if (error) return onError(error);
                    client.create('MediaPipeline', function (error,
mypipeline) {
                        if (error) return onError(error);
                        $log.log("Got MediaPipeline");

                        mypipeline.create(elements, function(error, elements){
                            if (error) return onError(error);

                            var recorder = elements[0];
                            var webRtc   = elements[1];


setIceCandidateCallbacks(self.webRtcPeerScreencast, webRtc, onError);

                            webRtc.processOffer(offer, function(error, answer) {
                                if (error) return onError(error);

                                console.log("offer");

                                webRtc.gatherCandidates(onError);
                                self.webRtcPeerScreencast.processAnswer(answer);
                            });

                            client.connect(webRtc, webRtc, recorder,
function(error) {
                                if (error) return onError(error);
                                self.screencastRecorder = recorder;

                                console.log("Connected");

                                recorder.record(function(error) {
                                  if (error) return onError(error);

                                  console.log("record");
                                });
                            });
                        });
                    });
                });
            }

    };



******************************

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