app.py

import os
import gradio as gr
import yt_dlp
import base64

def youtube2video(url):
    URL = url
    ydl_opts = {
        'format': 'bestaudio/best',
        'outtmpl': 'audio',
        'postprocessors': [{
            'key': 'FFmpegExtractAudio',
            'preferredcodec': 'mp3',
            'preferredquality': '192',
        }]
    }
    with yt_dlp.YoutubeDL(ydl_opts) as ydl:
        ydl.download([URL])
    with open('audio.mp3', 'rb') as file:
        mp3 = file.read()
    base64_mp3 = base64.b64encode(mp3).decode('utf-8')
    return base64_mp3

input_url = gr.Textbox()
output_base64 = gr.Textbox()

interface = gr.Interface(
    fn=youtube2video,
    inputs=input_url,
    outputs=output_base64,
)

interface.launch()