"Couldn't find ffmpeg or avconv - defaulting to ffmpeg, but may not work", RuntimeWarning

Question

For a captcha solver I need to use FFmpeg on Windows 10. Warning when running the code for the first time:

C:\Users\user\AppData\Roaming\Python\Python310\site-packages\pydub\utils.py:170: RuntimeWarning: Couldn't find ffmpeg or avconv - defaulting to ffmpeg, but may not work
  warn("Couldn't find ffmpeg or avconv - defaulting to ffmpeg, but may not work", RuntimeWarning)

Running the script anyway while it required ffprobe I got:

C:\Users\user\AppData\Roaming\Python\Python310\site-packages\pydub\utils.py:198: RuntimeWarning: Couldn't find ffprobe or avprobe - defaulting to ffprobe, but may not work
  warn("Couldn't find ffprobe or avprobe - defaulting to ffprobe, but may not work", RuntimeWarning)
Traceback (most recent call last):
  File "D:\Scripts\captcha\main.py", line 164, in <module>
    main()
  File "D:\Scripts\captcha\main.py", line 155, in main
    captchaSolver()
  File "D:\Scripts\captcha\main.py", line 106, in captchaSolver
    sound = pydub.AudioSegment.from_mp3(
  File "C:\Users\user\AppData\Roaming\Python\Python310\site-packages\pydub\audio_segment.py", line 796, in from_mp3
    return cls.from_file(file, 'mp3', parameters=parameters)
  File "C:\Users\user\AppData\Roaming\Python\Python310\site-packages\pydub\audio_segment.py", line 728, in from_file
    info = mediainfo_json(orig_file, read_ahead_limit=read_ahead_limit)
  File "C:\Users\user\AppData\Roaming\Python\Python310\site-packages\pydub\utils.py", line 274, in mediainfo_json
    res = Popen(command, stdin=stdin_parameter, stdout=PIPE, stderr=PIPE)
  File "C:\Program Files\Python310\lib\subprocess.py", line 966, in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
  File "C:\Program Files\Python310\lib\subprocess.py", line 1435, in _execute_child
    hp, ht, pid, tid = _winapi.CreateProcess(executable, args,
FileNotFoundError: [WinError 2] The system cannot find the file specified

I tried downloading it manually, editing environment variables, pasting them in the same folder as the script and installing with pip. FFmpeg works however my script doesn't.

Answer 1

If you haven't installed the ffmpeg/ffprobe as @Rotem answered, you can use my ffmpeg-downloader package:

pip install ffmpeg-downloader
ffdl install --add-path

The --add-path option adds the installed FFmpeg folder to the user's system path. Re-open the Python window and both ffmpeg and ffprobe will be available to your program.