here is the code for file name initialization and video to audio conversion through ffmpeg
Directory direc = (await getApplicationDocumentsDirectory());
Directory directory = Directory(direc.path+"/check");
print(directory.path);
  String command = "-i input_video.mp4 -vn -acodec copy output_audio.mp3";
  print(HomePage.pickedvideo);
  File file = File(directory.path+"/out.mp3");
  print(file);
  print(HomePage.pickedvideo);
    final FlutterFFmpeg FFmpeg = FlutterFFmpeg();
    FFmpeg.execute("ffmpeg -i ${HomePage.pickedvideo}"
        " -map 0:a "
        "-acodec ${file}")
        .then((rc)=>{
      print("FFmpeg process exited with rc $rc")
    });
This code is causing error
File:: Protocol not found Did you mean file:File:?
how can i solve it?
 
                        
can u try this code ?