Recherche avancée

Sur d’autres sites (4359)

• Real time livestreaming - RPI FFmpeg and H5 Player

  29 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) ?

  &#xA;

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

  &#xA;

  &#xA;

  Flow schema

  &#xA;

  Data exchange and use case flow :

  &#xA;

  

  &#xA;

  &#xA;

  Note : The nurse and doctor use HTTP-FLV to play the live stream, for low latency.

  &#xA;

  &#xA;

• ffplay with gdigrab doesn't render properly

  14 avril 2022, par laggingreflex

  I'm trying to do this :

  &#xA;

  ffplay -f gdigrab -framerate 30 -i title="Untitled - Notepad"


  &#xA;

  It's supposed to show the notepad window in the ffplay window.

  &#xA;

  But it doesn't seem to render properly.. it shows scrollbars but not anything written in the notepad. Other windows ("calculator") don't show properly either.

  &#xA;

  Does ffplay not work (well) with gdigrab ? Or is it just me ?

  &#xA;

  

  &#xA;

• Rendering libav-decoded video stream in android sdl ? or ?

  13 avril 2013, par user1568549

  I've successfully cross-compiled a c++ video streaming library to the android ICS platform

  This library contains a sample player that uses sdl library to render the resulting decoded video streams and libav for decoding that i've also succeeded to cross compile(libav ... classes) Then, i 've made the necessary jni classes and tested it using log tags it seems that everything is fine but now i want to show the result on the screen(show the real streaming not just log messages)

  I am searching for the easiest way to render my stream (just to be sure that everything works fine)

  Am i oblige to cross compile the sdl library too ? is it possible ? if yes is there any good tutorial ?

  Is there any other solution to render directly ffmpeg decoded frames ?

  Thanks in advance.