```
def extract_audio_from_video(file_path: str) -> np.ndarray:
    inputfile = ffmpeg.input(file_path)
    out = inputfile.output('-', format='f32le', acodec='pcm_f32le', ac=1, ar='44100')
    raw = out.run(capture_stdout=True)
    del inputfile, out
    return np.frombuffer(raw[0],np.float32)

```