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• An Electron RTSP player : How to play video stream ?

  26 octobre 2022, par Siavoshkc

  What seemed to be an easy job turned out otherwise. I wanted to write an Electron app to manage DVR streams as I wasn't satisfied with some apps I used. I choose Electron because I recently started JS and took the opportunity to practice it and also play a bit with Electron.

  


  After deciding about how to handle GUI using web components, it was time to see how to read RTSP streams. My initial approach was to use FFmpeg. But I didn't know how to do so in Nodejs or Electron so I started a research.

  


  Long story short I understood that if one wants to use a C/C++ library in JS the best practice is to create bindings using Node API (formerly NAPI) which will result in a FFmpeg native addon. Then I assumed there is already a decent such addon available as FFmpeg is the go-to for video stuff. But to my surprise this isn't the case. Although there are some packages which run ffmpeg executive binary the ones that provide the binding are rare and not recent (such as beamcoder).

  


  FFmpeg web assembly is another option which I may consider but seemed overkill as I am not opening the streams in pure browser.

  


  Another approach was to use chromium media abilities as it has FFmpeg bundled for some media functions but to my understanding it cannot open RTSP streams at least for now.

  


  Can you please add to my current understanding on the matter ?

  


• 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) ?

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

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• FFmpeg iOS RTSP Player compile issue

  15 septembre 2017, par Julien Chevet

  I’m trying to compile a project which use FFmpeg libraries in iOS : https://github.com/hackacam/ios_rtsp_player

  This project successfully compile for armv7 architecture but I can’t compile it for arm64 cause FFmpegDecoder.framework has :

  "Undefined symbols for architecture arm64"

  So I tried to recompile the FFmpegDecoder.framework from this project : https://github.com/mooncatventures-group/ffmpegDecoder with the latest build of FFmpeg library : https://downloads.sourceforge.net/project/ffmpeg-ios/ffmpeg-ios-master.tar.bz2

  But I have some headers issues like you can see in my project : https://wetransfer.com/downloads/b1a3fc1438d2464ebeb86f38b08e1dff20161215093957/9b4211

  I don’t know if I use the good way to compile the framework.

  Can you help me to fix this issue ?

  Thanks in advance.

  My configuration :

  macOS 10.12.2
  
  Xcode 8.1
  
  FFmpeg 3.2.2