import subprocess
import os
import shutil

def ex():
    video_directory = "video"
    video_files = [f for f in os.listdir(video_directory) if f.endswith(".mp4")]
    for mp4_file in video_files:
        # Full path to the mp4 file
        mp4_file_path = os.path.join(video_directory, mp4_file)
        print(mp4_file_path)
        os.rename(mp4_file_path, "video.mp4")
        command2mp3 = f"ffmpeg -i video.mp4 speech.mp3"
        command2wav = "ffmpeg -i speech.mp3 speech.wav"
        subprocess.run(command2mp3, shell=True)
        subprocess.run(command2wav, shell=True)