Error in recorded webm file

[shada...@gmail.com]

Hello All

I am using kurento-one2-many call in my application and I am recording 2 files simultaneously. I am able to record the recorded1.webm  and recorded2.webm files successfully. When I try to get the duration of the recorded files using ffmpeg I do not get proper result and also some times ffmpeg says read error when I try to post-process the recorded files. But this case is not likely always. Some times I get 1st file properly and 2nd file as defected & some times vice-versa, and sometimes both file has problems can anybody please let me know why is this so? 

Thank You

Shadanana

[Ivan Gracia]

Is it a modified one2many call, or the regular app with just the recorder added?

Ivan Gracia

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[shada...@gmail.com]

Hai Ivan,

 I have done few modifications in one2many call app. Modifications are like, instead of only one presenter, one camera and multiple viewers to that presenter , I have changed presenter variable to presenters map so that many presenters can exist. One presenter will broadcast 2 cameras and both the cameras will get recorded.

My modifications goes here 

 if(presenters[sessionId] == null) {
        var presenter = {
                        id : sessionId,                        
                        pipeline : null,
                        webRtcEndpointCamera1 : null,
                        webRtcEndpointCamera2 : null,
                        Camera1Recorder : null,
                        Camera2Recorder : null
                };
                presenters[presenter.id] = presenter;
        }

kurentoClient.create('MediaPipeline', function(error, pipeline) {

if (error) {

stop(sessionId);

return callback(error);

}

if (presenters[sessionId] === null) {

stop(sessionId);

return callback(noPresenterMessage);

}

presenters[sessionId].pipeline = pipeline;

pipeline.create('WebRtcEndpoint', function(error, webRtcEndpoint) {

if (error) {

stop(sessionId);

return callback(error);

}

if (presenters[sessionId] === null) {

stop(sessionId);

return callback(noPresenterMessage);

}

webRtcEndpoint.setMaxVideoSendBandwidth(2500);

webRtcEndpoint.setMinVideoSendBandwidth(1500);

webRtcEndpoint.setMaxVideoRecvBandwidth(2500);

webRtcEndpoint.setMaxOuputBitrate(2500000);

webRtcEndpoint.setMinOuputBitrate(2000000);

if(cam == '1') {

presenters[sessionId].webRtcEndpointCamera1 = webRtcEndpoint;

presenters[sessionId].Camera1Recorder = webRtcEndpoint;

                if (candidatesQueue1[sessionId]) {

                    while(candidatesQueue1[sessionId].length) {

                        var candidate = candidatesQueue1[sessionId].shift();

                        webRtcEndpoint.addIceCandidate(candidate);

                    }

                }

                webRtcEndpoint.on('OnIceCandidate', function(event) {

                    var candidate = kurento.register.complexTypes.IceCandidate(event.candidate);

                    ws.send(JSON.stringify({

                      id : 'iceCandidate',

                        candidate : candidate

                    }));

                });

webRtcEndpoint.processOffer(sdpOffer, function(error, sdpAnswer) {

if (error) {

stop(sessionId);

return callback(error);

}

if (presenters[sessionId] === null) {

stop(sessionId);

return callback(noPresenterMessage);

}

callback(null, sdpAnswer);

});

recordParams = {

           uri : "file:///home/kurentofiles/myVideo1.webm", 

mediaProfile: "WEBM"

        };

pipeline.create("RecorderEndpoint", recordParams, function(error, recorderEndpoint) {

                                if (error) {

                                        console.log("Recorder problem");

                                        return sendError(res, 500, error);

                                }

                                

presenters[sessionId].Camera1Recorder = recorderEndpoint;

presenters[sessionId].webRtcEndpointCamera1.connect(presenters[sessionId].Camera1Recorder);

                                presenters[sessionId].Camera1Recorder.record();

                               

});

} 

else if (cam == '2') {

presenters[sessionId].webRtcEndpointCamera2 = webRtcEndpoint;

presenters[sessionId].Camera2Recorder = webRtcEndpoint;

                if (candidatesQueue2[sessionId]) {

                    while(candidatesQueue2[sessionId].length) {

                        var candidate = candidatesQueue2[sessionId].shift();

                        webRtcEndpoint.addIceCandidate(candidate);

                    }

                }

                webRtcEndpoint.on('OnIceCandidate', function(event) {

                    var candidate = kurento.register.complexTypes.IceCandidate(event.candidate);

                    ws.send(JSON.stringify({

                        id : 'iceCandidate',

                        candidate : candidate

                    }));

                });

webRtcEndpoint.processOffer(sdpOffer, function(error, sdpAnswer) {

if (error) {

stop(sessionId);

return callback(error);

}

if (presenters[sessionId] === null) {

stop(sessionId);

return callback(noPresenterMessage);

}

callback(null, sdpAnswer);

});

recordParams2 = {

           uri : "file:///home/kurentofiles/myVideo2.webm", 

mediaProfile: "WEBM"

        };

pipeline.create("RecorderEndpoint", recordParams2, function(error, recorderEndpoint) {

                                if (error) {

                                        console.log("Recorder problem");

                                        return sendError(res, 500, error);

                                }

                                

presenters[sessionId].Camera2Recorder = recorderEndpoint;

presenters[sessionId].webRtcEndpointCamera2.connect(presenters[sessionId].Camera2Recorder);

                                presenters[sessionId].Camera2Recorder.record();

                               

}

                

webRtcEndpoint.gatherCandidates(function(error) {

                    if (error) {

                        stop(sessionId);

                        return callback(error);

                    }

                });

            });

Every time when I record My 2nd recorded file (MyVideo2.webm) will be proper. I mean I can do post processing on it, ffmpeg will show the file duration, dimensions properly. But with  first file I cannot do anything as ffmpeg says read error and also it truncates some packets of the file if I try to post process. And interestingly this problem exists only If 2 cameras are present. I mean If only 1 camera is present then MyVideo1.webm will be proper with out errors.  

Please help me out with this issue

Many Thanks

Shadanana 

[Ivan Gracia]

Are you able to see both streams? I mean, apart from recording, do you get booth feeds? When negotiating the webrtc connections and sending the ICE candidates, I don't see how you differentiate one webrtc from the other. I'm wondering if you are keeping two RTCPeerConnections in the client, or only one.

Ivan Gracia

[karthike...@gmail.com]

Hello Ivan,

I am facing almost similar kind of issue as described by Shadanana. I am trying to stream 2 cameras from one presenter and trying to receive it in viewers end. I have created  2 separate webrtc endpoints for presenters and viewers as well. let me consider the same code sequence that has been given above

My presenter function : 

if(presenters[sessionId] == null) {
        var presenter = {
                        id : sessionId,                        
                        pipeline : null,
                        webRtcEndpointCamera1 : null,
                        webRtcEndpointCamera2 : null,
                        Camera1Recorder : null,
                        Camera2Recorder : null
                };
                presenters[presenter.id] = presenter;
        }

kurentoClient.create('MediaPipeline', function(error, pipeline) {

if (error) {

stop(sessionId);

return callback(error);

}

if (presenters[sessionId] === null) {

stop(sessionId);

return callback(noPresenterMessage);

}

presenters[sessionId].pipeline = pipeline;
 

if(camera == '1') {

                        pipeline.create('WebRtcEndpoint', function(error, webRtcEndpoint) {

                            ......

                            . . . . . .

                   });

              } 

else if(camera == '2') {

                        pipeline.create('WebRtcEndpoint', function(error, webRtcEndpoint) {

                            ......

                            . . . . . .

                   });

              } 

Similarly 2 separate webRtcEndpoint has been created for viewers function as well

my client side code goes here: 

function start() {

showSpinner(video);

var options = {

localVideo: video,
                        mediaConstraints : constraints,

onicecandidate : onIceCandidate

   }

webRtcPeer = kurentoUtils.WebRtcPeer.WebRtcPeerSendonly(options, function(error) {

if(error) return onError(error);

this.generateOffer(onOfferPresenter);
                         myarray.push(webRtcPeer);

});

}

The start function will run twice if 2 camera feeds are given. I am able to capture both the streams but not able to receive it in viewers end. I get an error stating : 

Received message: "id":"viewerResponse","response":"rejected","message":"code":40004,"responseTimestamp":1452838844004,"stack":"Error: Media elements does not share pipeline

But everything works well with single camera. I am bit confused and not able to recognize where did I go wrong. Please help to overcome this issue

Thank You

Karthik Vaidya

On Tuesday, December 22, 2015 at 3:32:57 PM UTC+5:30, shada...@gmail.com wrote:

[karthike...@gmail.com]

Heyyy !! I got the Solution for my issue. pipeline was creating twice and it was mismatching. Handled it and now its going easy

Thank You

On Tuesday, December 22, 2015 at 3:32:57 PM UTC+5:30, shada...@gmail.com wrote:

[Ivan Gracia]

Hey! I see the line "Error: Media elements does not share pipeline has given you the clue ;-)

Ivan Gracia

[karthike...@gmail.com]

Enter code here...

Hello Ivan,

    Exactly that error line gave me a clue when I thought bit deeper on it.. :) so cheers..

    Now I tried to increase the resolution of the video from default 480p to 720p even to 1080p. When I searched for the similar topic in group I found your answer in this link :  https://groups.google.com/forum/#!msg/kurento/KvmpWvUjs_8/0V5yLebRy4MJ but I have also seen that you have said "Those constraints are not according to the specification." in few other questions for same mediaConstraints format . I tried like this :

                var constraints = {

                                audio: {

                                optional: [{

                                sourceId: mikeId

                                   }]

                                },

                                video: {

                                optional: [{
                                      maxWidth : 1080,
 minWidth : 720,

                                     sourceId: cameraId

                                    }]

                                }

                             };

                var options = {

                        localVideo: video,

                        mediaConstraints : constraints,

                        onicecandidate : onIceCandidate

                        }

                webRtcPeer = kurentoUtils.WebRtcPeer.WebRtcPeerSendonly(options, function(error)

But no success.. Error was "failed to execute 'webkitGetUserMedia' or 'Navigator ': malformed constraints object "

How can I set the resolution ??

Thanks

Karthik  Vaidya

On Tuesday, December 22, 2015 at 3:32:57 PM UTC+5:30, shada...@gmail.com wrote:

[karthike...@gmail.com]

Heyy !! :) I got it working.. just made small changes.. :) :P

var constraints = {

                                audio: {

                                optional: [{

                                sourceId: mikeid

                                   }]

                                },

                                video: {

                                mandatory: {

                                minWidth: 1280,

                                minHeight: 720,

                                minFrameRate: 30

                                        },

                                optional: [{

                                sourceId: cameraid

                                    }]

                                }

                             };

Now going good..

Cheers 

On Tuesday, December 22, 2015 at 3:32:57 PM UTC+5:30, shada...@gmail.com wrote:

[Ivan Gracia]

Cool! But watch it, as those constraints are still not according to spec ;-) They should be something similar to this

var constraints = {
    audio: false,
    video: {
        width: { min: 1024, ideal: 1280, max: 1920 },
        height: { min: 576, ideal: 720, max: 1080 },
    }
};

Check this great stackoverflow answer. You can also use this test page to check the effect with different values.

Ivan Gracia

[karthike...@gmail.com]

Thanks Ivan, I modified the constraints as you suggested.. :) :)

On Tuesday, December 22, 2015 at 3:32:57 PM UTC+5:30, shada...@gmail.com wrote:

[Ivan Gracia]

You are welcome ;-)

[karthike...@gmail.com]

Hello Ivan :)

Here I am again with another question..:) I am wondering if I can change the audio source and resolution dynamically while my video is being broadcasted and recorded. Is there any such possibilities??  Let me be more clear. Imagine I have 4 microphones connected and visible in dropdown and I am initially broadcasting in 720p. So after some time I wish to switch to mike3 and 1080p without reloading the session.. How can I achieve This..? Please help

Thank You

Karthik 

On Tuesday, December 22, 2015 at 3:32:57 PM UTC+5:30, shada...@gmail.com wrote:

[Ivan Gracia]

Hi Karthik,

Please open a separate thread for this, as it's a totally and unrelated topic. We can continue there :-)

Ivan Gracia