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• Run ffmpeg audio under Windows with Flutter

  11 janvier, par Chris

  I'd like to stream audio comming from my microphone in my flutter app in the windows desktop version.

  


  Since there is no library that seems to do such thing while supporting windows desktop app, I have tried using Process like this :

  


  // Start the FFmpeg process to capture audio
ffmpegProcess = await Process.start(
  'ffmpeg',
  [
    '-f', 'dshow', // Specify DirectShow input for Windows
    '-i', 'audio="$selectedMic"', // Input audio device (selected mic)
    '-f', 'wav', // Set audio format
    '-ar', '44100', // Set audio sample rate
    '-ac', '1', // Mono channel
    '-b:a', '128k', // Set audio bitrate
    'pipe:1', // Output to stdout
  ],
);

// Listen for data on stdout (audio stream)
ffmpegProcess.stdout.listen((data) async {
  // Send audio data to the server as it comes in
  await sendAudioToServer(data);
});


  


  I've tested the command directly in my terminal (not in the flutter app) and it works fine.

  


  When I run this code in my Flutter app, my task manager also shows a "ffmpeg" process, but somehow there is no stream output in flutter, even after ensuring that the selectedMic variable is correct or even when its hardcoded.

  


  Since this command runs without issue in my terminal and even in python, I am wondering why it does not work in Flutter.

  


  Starting my vscode as administrator also don't solve the issue (I wanted to check if it's a permission issue).

  


  Also relevant : When I run the "ffmpeg -version" command, I get an output for the version, meaning that this is not an installation problem (ffmpeg bin folder is in my PATH environment variable). The problem seems to come from recording from the microphone in flutter, but I don't get why.

  


  ffmpegProcess = await Process.start('ffmpeg', ['-version']);  // this works


  


  I'd love to get some suggestions where the problem could come from or any kind of alternative solutions.

  


• Live streaming HLS on Red 5 Media Server on Windows Server

  31 juillet 2013, par user1516711

  I am trying to develop a streaming server using Red 5 on Windows Server that would have two clients, a web app running on Windows 8 PCs and an iOS app.

  The problem I'm facing is that iOS only supports HLS and Red 5 only supports RTSP/RTMP, so I need to convert incoming streams from HLS to RTSP/RTMP and outgoing streams from RTMP/RTSP to HLS using FFMPEG commands. How would I go about this ? Should I modify the Red 5 server code or is there a better alternative ?

• get_cabac_inline_x86 : Don't inline if 32-bit clang on windows

  17 août 2021, par Christopher Degawa

  get_cabac_inline_x86 : Don't inline if 32-bit clang on windows
  Fixes https://trac.ffmpeg.org/ticket/8903
  relevant https://github.com/msys2/MINGW-packages/discussions/9258
  Signed-off-by : Christopher Degawa <ccom@randomderp.com>
  
  Signed-off-by : Martin Storsjö <martin@martin.st>
  

  • [DH] libavcodec/x86/cabac.h