Hi,
Sorry for the delay. The problem was more complex than expected. It seems that the demo stoped working due to a combination of problems.

1. Chrome seems to have modified its security policities and now you cannot combine secure connections (the demo is based on TLS and WSS) with insecure connections (as required for viewing the video) in the same application.
2. It seems that Chrome no longer supports the format provided by Kurento HttpGetEndpoint cointaining a video track but not audio tracks.

As a result, there are two possible fixes
1. To avoid using HttpGetEndpoint and use directly WebRtcEndpoint for visualizing the recorded stream. This is the solution we have chosen. We have uploade a patch to GitHub implementing this solution for the demo. We have checked that it works correctly. The patch can be obtained here:
https://github.com/Kurento/kurento-tutorial-js/tree/release-5.1/kurento-recorder-screen
2. To avoid using HttpGetEndpoint and directly dowload video using a standard WWW server (i.e. apache, tomcat, etc.) For this, you just need to keep all the code responsible fo the recording, but the visualization of the video needs to be performed as a simple HTML application linking to the appropriate files that shall be served through a standard WWW server.

Hopefuly this shall fix your problems. From our side, the issue is closed. You may re-open it again if you find further difficulties.

Dear FIWARE coach,
we forward you an update request received from a CreatiFI applicant

**********************************
Dear support,
given that the CreatiFI FIWARE Accelerator program OC1 is going to finish,
we are kindly asking update about the kurento issue, we need to use kurento
and develop with it.

BR

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

On Wed, Jun 10, 2015 at 8:50 AM, Andrea Maestrini <amaestrini@create-net.org
> wrote:

> Dear FIWARE coach,
> we forward you an update 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.
>
> ***********************
> Dear support,
> after your reply "We have detected a bug in the kurento-recorder-screen
> tutorial and we'll fixing it in the next few days. We'll report on this
> ticket when it's ready. Sorry for the inconveniences."
>
> Some day are passed, any news about this issue? We need to develop asap.
>
> thxs
>
> ***********************
>
> On Thu, May 28, 2015 at 3:01 PM, Andrea Maestrini <
> amaestrini@create-net.org> wrote:
>
>> 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.
>>
>> ******************************************
>>
>> I am trying to record a screencast and replaying it afterwards.
>> It is possible to record them and play them back through VLC or the
>> browser.
>> But when creating an app with Kurento JS libraries the recording cannot
>> be replayed!
>>
>> I am pretty sure this was working before in my prototype!
>>
>> I also tried the kurento-recorder-screen tutorial, and I have the same
>> problem, file is recorded but cannot be played back.
>> I already checked on 2 of my servers with the same result.
>>
>> This is the tutorial I am talking about on Github:
>>
>> https://github.com/Kurento/kurento-tutorial-js/tree/release-5.1/kurento-recorder-screen
>>
>> See attachment for my server log containing the following error:
>> 2015-05-23 22:43:01.911845 3779 [2825481024] error vp8enc
>> gstvp8enc.c:1902 gst_vp8_enc_drain() <vp8enc0> encode returned 1 error
>>
>> Link below you can also find the recorded file, which can be played back
>> by vlc, firefox through plain http request - but not with the tutorial
>> itself...
>> https://dl.dropboxusercontent.com/u/10859794/jantje2.webm
>>
>> *I already made 2 posts about this on Kurento Google Forum but no reply
>> yet:*
>> https://groups.google.com/forum/#!topic/kurento/7hJgPHBnDYk
>> https://groups.google.com/forum/#!topic/kurento/nNePLd_J544
>>
>> I think it is something for the Kurento owner to look into.
>>
>>
>> ******************************************
>>
>
>
>
> –
>
> ====================================================================
>
> Andrea Maestrini, ing.
>
> CREATE-NET
>
> FraME, Future Media Solutions Area
>
> Research Engineer
>
> Via alla Cascata 56C – 38123 Povo, Trento - Italy
>
> e-mail: andrea.maestrini@create-net.org
>
> Phone: (+39) 0461 312424
>
> Fax: (+39) 0461 421157
>
> www.create-net.org
>
> ====================================================================
>
> The information transmitted is intended only for the person or entity to
> which it is addressed and may contain confidential and/or privileged
> material. Any review, retransmission, dissemination or other use of, or
> taking of any action in reliance upon, this information by persons or
> entities other than the intended recipient is prohibited according to the
> Italian Law 196/2003 of the Legislature. If you received this in error,
> please contact the sender and delete the material from any computer.
>
> ===========================================================
>

–

====================================================================

Andrea Maestrini, ing.

CREATE-NET

FraME, Future Media Solutions Area

Research Engineer

Via alla Cascata 56C – 38123 Povo, Trento - Italy

e-mail: andrea.maestrini@create-net.org

Phone: (+39) 0461 312424

Fax: (+39) 0461 421157

www.create-net.org

====================================================================

The information transmitted is intended only for the person or entity to
which it is addressed and may contain confidential and/or privileged
material. Any review, retransmission, dissemination or other use of, or
taking of any action in reliance upon, this information by persons or
entities other than the intended recipient is prohibited according to the
Italian Law 196/2003 of the Legislature. If you received this in error,
please contact the sender and delete the material from any computer.

===========================================================

_______________________________________________
Fiware-creatifi-coaching mailing list
Fiware-creatifi-coaching@lists.fi-ware.org
https://lists.fi-ware.org/listinfo/fiware-creatifi-coaching

Dear FIWARE coach,
we forward you an update 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.

***********************
Dear support,
after your reply "We have detected a bug in the kurento-recorder-screen
tutorial and we'll fixing it in the next few days. We'll report on this
ticket when it's ready. Sorry for the inconveniences."

Some day are passed, any news about this issue? We need to develop asap.

thxs

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

On Thu, May 28, 2015 at 3:01 PM, Andrea Maestrini <amaestrini@create-net.org
> wrote:

> 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.
>
> ******************************************
>
> I am trying to record a screencast and replaying it afterwards.
> It is possible to record them and play them back through VLC or the
> browser.
> But when creating an app with Kurento JS libraries the recording cannot be
> replayed!
>
> I am pretty sure this was working before in my prototype!
>
> I also tried the kurento-recorder-screen tutorial, and I have the same
> problem, file is recorded but cannot be played back.
> I already checked on 2 of my servers with the same result.
>
> This is the tutorial I am talking about on Github:
>
> https://github.com/Kurento/kurento-tutorial-js/tree/release-5.1/kurento-recorder-screen
>
> See attachment for my server log containing the following error:
> 2015-05-23 22:43:01.911845 3779 [2825481024] error vp8enc
> gstvp8enc.c:1902 gst_vp8_enc_drain() <vp8enc0> encode returned 1 error
>
> Link below you can also find the recorded file, which can be played back
> by vlc, firefox through plain http request - but not with the tutorial
> itself...
> https://dl.dropboxusercontent.com/u/10859794/jantje2.webm
>
> *I already made 2 posts about this on Kurento Google Forum but no reply
> yet:*
> https://groups.google.com/forum/#!topic/kurento/7hJgPHBnDYk
> https://groups.google.com/forum/#!topic/kurento/nNePLd_J544
>
> I think it is something for the Kurento owner to look into.
>
>
> ******************************************
>

–

====================================================================

Andrea Maestrini, ing.

CREATE-NET

FraME, Future Media Solutions Area

Research Engineer

Via alla Cascata 56C – 38123 Povo, Trento - Italy

e-mail: andrea.maestrini@create-net.org

Phone: (+39) 0461 312424

Fax: (+39) 0461 421157

www.create-net.org

====================================================================

The information transmitted is intended only for the person or entity to
which it is addressed and may contain confidential and/or privileged
material. Any review, retransmission, dissemination or other use of, or
taking of any action in reliance upon, this information by persons or
entities other than the intended recipient is prohibited according to the
Italian Law 196/2003 of the Legislature. If you received this in error,
please contact the sender and delete the material from any computer.

===========================================================

_______________________________________________
Fiware-creatifi-coaching mailing list
Fiware-creatifi-coaching@lists.fi-ware.org
https://lists.fi-ware.org/listinfo/fiware-creatifi-coaching

We have detected a bug in the kurento-recorder-screen tutorial and we'll fixing it in the next few days. We'll report on this ticket when it's ready. Sorry for the inconveniences.