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• Real time livestreaming - RPI

  24 avril 2022, par Victor

  I work at a telehealth company and we are using connected medical devices in order to provide the doctor with real time information from these equipements, the equipements are used by a trained health Professional.

  


  Those devices work with video and audio. Right now, we are using them with peerjs (so peer to peer connection) but we are trying to move away from that and have a RPI with his only job to stream data (so streaming audio and video).

  


  Because the equipements are supposed to be used with instructions from a doctor we need the doctor to receive the data in real time.

  


  But we also need the trained health professional to see what he is doing (so we need a local feed from the equipement)

  


  How do we capture audio and video

  


  We are using ffmpeg with a go client that is in charge of managing the ffmpeg clients and stream them to a SRS server.
This works but we are having a 2-3 sec delay when streaming the data. (rtmp from ffmpeg and flv on the front end)

  


  ffmpeg settings :

  


  ("ffmpeg", "-f", "v4l2", `-i`, "*/video0", "-f", "flv", "-vcodec", "libx264", "-x264opts", "keyint=15", "-preset", "ultrafast", "-tune", "zerolatency", "-fflags", "nobuffer", "-b:a", "160k", "-threads", "0", "-g", "0", "rtmp://srs-url")


  


  My questions

  


  

  • Is there a way for this set up to achieve low latency (<1 sec) (for the nurse and for the doctor) ?

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  • Is the way I want to achieve this good ? Is there a batter way ?

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  Flow schema

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  Data exchange and use case flow

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• Revision 78002 : Mise a jour de la librairie OpenID : https://github.com/openid/php-openid ...

  6 novembre 2013, par cedric@… — Log

  Mise a jour de la librairie OpenID :
  ​https://github.com/openid/php-openid n’a plus de tag depuis la version 2.2.2 qui date de 4 ans, mais le master contient un certain nombre de bugfixes (notamment les passages par reference qui font une erreur 500 en PHP 5.4). On retient le master revision ee669c6 et on la stocke sur ​http://contrib.spip.net/IMG/zip/openid-php-openid-master-ee669c6.zip

• Anomalie #4355 (Nouveau) : critère {0,n} et variable

  21 juin 2019, par Fabrice Véronneau

  Salut,

  Pour rejoindre en partie le ticket https://core.spip.net/issues/4209 je pose le problème rencontré :

  Une boucle ayant comme critère

  <span class="CodeRay">{0,#ENV{max,n}}</span>

  ne fonctionne pas. Elle sort en équivalence SQL

  <span class="CodeRay">LIMIT <span class="integer">0</span>,<span class="integer">0</span></span>

  donc 0 résultat, alors que si l’on met en dur :
  

  <span class="CodeRay">{0,n}</span>

  cela affiche tous les résultats. Cela force à mettre un nombre max acceptable du type :

  <span class="CodeRay">{0,#ENV{max,9999}}</span>