To the kind attention of Kurento experts, I would like to share the conversation with Luis Lopez about a video quality issue, in order to have your support through Jira as we have been told. Thank you ---------- Forwarded message ---------- From: Luis López Fernández <luis.lopez at urjc.es> Date: 2015-04-21 20:38 GMT+02:00 Subject: Re: Kurento > video quality To: Leonardo Galteri <leonardogalteri at gmail.com> Hi Leonardo, Today we have been informed that the FIWARE policies for providing support to Accelerator's participants need to be satisfied. Unfortunately this means that I can only provide support to you through the FIWARE Jira. I would appreciate if you could open a Jira issue for tracking this problem. Otherwise, the efforts we invest here shall be not covered by FIWARE, which is somehow a problem for us. Sorry for the inconveniences. Best. ----------------------------------------------------------- Luis López Fernández Subdirector de Investigación y Relaciones con la Empresa Escuela Técnica Superior de Ingenieros de Telecomunicación Universidad Rey Juan Carlos http://www.etsit.urjc.es e-mail: luis.lopez at urjc.es Tf1: +34 914 888 747 Tf2: + 34 914 888 713 El 21/04/2015, a las 20:30, Leonardo Galteri <leonardogalteri at gmail.com> escribió: Hi Luis, thank you for your reply, unfortunately we haven't many choices because of the limitations of the video formats, but this could be a solution. Allowing a good quality streaming towards Wowza and let this server handle the distribution of the stream to iOS/Android users with HLS protocol. Is it a feasible solution in your opinion? How can I change the transcoding bitrate in Kurento, is there a configuration file, an API or is it a hardcoded parameter? Thank you again 2015-04-20 16:37 GMT+02:00 Luis López Fernández <luis.lopez at urjc.es>: > Hi, > Indeed 300Kbps is the default configuration of KMS transcoders. This can > be changed, but only to a fixed value. In other words, you can improve the > quality but it will not be adaptive because RTMP don't support adaptive > quality. Is this what you are looking for? > > Best. > > ----------------------------------------------------------- > Luis López Fernández > Subdirector de Investigación y Relaciones con la Empresa > Escuela Técnica Superior de Ingenieros de Telecomunicación > Universidad Rey Juan Carlos > http://www.etsit.urjc.es > e-mail: luis.lopez at urjc.es > Tf1: +34 914 888 747 > Tf2: + 34 914 888 713 > > > > > > > El 20/04/2015, a las 16:33, Leonardo Galteri <leonardogalteri at gmail.com> > escribió: > > Hello Luis, > the problem is that Wowza doesn't support VP8 format, so we have to use > the RtpEndpoint on Kurento to perform our stream with the standard h.264. > In this way, the bitrate is fixed to 300 kb/s, that is we have a bad > quality blocky video, whatever protocol we choose in Wowza in order to > stream to any mobile device. > Furthermore, even if we don't use Wowza, if we reproduce the RTP stream > obtained from Kurento with any other tool (VLC, ffplay, gst-play, etc) we > obtain exactly the same result, a fixed bitrate of 300 kb/s. > > Thank you > > 2015-04-20 16:16 GMT+02:00 Luis López Fernández <luis.lopez at urjc.es>: > >> Hi, >> Indeed RTMP don't support adaptive quality. This is one of the reasons >> why other protocols such as WebRTC or HLS were created. In principle, if >> latency is not an issue for you, you should be able to stream from Wowza >> using adaptive protocols such as HTS or MPEG-DASH, which are supported by >> Wowza off-the-shelf. However, this may also require specific players which >> are not always free. >> >> Best. >> >> L. >> >> >> El 20/04/2015, a las 15:00, Daniele Galiffa | GoalShouter.com >> <http://goalshouter.com/> <daniele at goalshouter.com> escribió: >> >> Ciao Luis, how are you doing? >> >> I hope everything is great. >> >> We are continuing working on Kurento but we have some issues in streaming >> from Kurento to Wowza but it seems that RTMP stream has a fixed video >> quality. >> >> Is there any chance to change or set it? >> >> Leo is in cc to provide more tech-details about the issue we are trying >> to solve. >> >> Thanks, >> d. >> >> >> -- >> >> [image: GoalShouter] <http://www.goalshouter.com/>*Daniele Galiffa* | CEO >> daniele at goalshouter.com <rafaele at goalshouter.com> | +39 335 57 53 078 >> GoalShouter.com <http://www.goalshouter.com/> | [image: View my profile on LinkedIn] <http://linkedin.com/in/danielegaliffa> [image: Follow me on Twitter] <http://twitter.com/danielegaliffa> [image: Skype me] [image: Facebook Page] <https://www.facebook.com/GoalShouter> [image: Get iPhone App for free] <http://itunes.apple.com/app/goalshouter/id428932802?mt=8> >> [image: Startup Sauna] <http://startupsauna.com/>StartUp Sauna Spring Batch 2012 >> StartUp Sauna Demo Day Winner | Helsinki, June 8th 2012 >> >> >> > > -------------- next part -------------- An HTML attachment was scrubbed... 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