app.py

#import os
#os.system("python -m pip install --upgrade pip")
#os.system("pip uninstall -y gradio")
#os.system("pip install gradio==3.28.3")
import gradio as gr
from moviepy.editor import *
import base64

def mp4_to_mp3(mp4):     
    mp4_without_frames = AudioFileClip(mp4)     
    mp4_without_frames.write_audiofile("audio.mp3")     
    mp4_without_frames.close()
    with open('audio.mp3', 'rb') as file:
      mp3 = file.read()
    base64_mp3 = base64.b64encode(mp3).decode('utf-8')
    return base64_mp3 

input_video = gr.Video(source="upload", type="filepath")
output_text = gr.Textbox()

interface = gr.Interface(
    fn=mp4_to_mp3,
    inputs=input_video,
    outputs=output_text,
)

interface.launch()