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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.

  


• x264 plugins compilation error

  8 décembre 2014, par Rajendran Ambika

  Am trying to compiling X264 plugins of FFMPEG in Mac terminal, While compiling am receiving following error in the CONFIG.LOG.

   couldn't understand kern.osversion `14.0.0'
  
   conftest.c:1: error: bad value (armv7a) for -march= switch
  
   conftest.c:1: error: bad value (armv7a) for -mtune= switch

• ffmpeg mp4->mp3 conversion 'no such file'

  10 juin 2016, par Thomas R.

  I’m using ffmpeg to convert mp4’s to mp3’s, about 124 videos total, and I’m using python to iterate through the files they’re in and executing a version of ffmpeg -i pathtovideo/video.mp4 pathtoaudio/audio.mp3 to convert them.

  When I use this command on its own in terminal, it converts just fine, but calling from the python script (using os) it says pathtoaudio/audio.mp3: No such file or directory but of course there isn’t, I’m asking the computer to generate this file. Any ideas for what might be going wrong or how to fix ?