Вот несколько способов конвертировать видео YouTube в файлы MP3 с примерами кода:

Метод 1: использование youtube-dl и FFmpeg (Python)

import youtube_dl
import subprocess
def youtube_to_mp3(url):
    ydl_opts = {
        'format': 'bestaudio/best',
        'postprocessors': [{
            'key': 'FFmpegExtractAudio',
            'preferredcodec': 'mp3',
            'preferredquality': '192',
        }],
    }
    with youtube_dl.YoutubeDL(ydl_opts) as ydl:
        info = ydl.extract_info(url, download=False)
        video_title = info.get('title', None)
        ydl.download([url])

    # Rename the downloaded file to a more user-friendly name
    output_file = f"{video_title}.mp3"
    subprocess.run(['mv', 'output.mp3', output_file])
# Usage
youtube_to_mp3('https://www.youtube.com/watch?v=VIDEO_ID')

Метод 2: использование youtube-dl и FFmpeg (командная строка)

youtube-dl --extract-audio --audio-format mp3 --audio-quality 192K --output "%(title)s.%(ext)s" "https://www.youtube.com/watch?v=VIDEO_ID"

Метод 3. Использование pytube (Python)

from pytube import YouTube
def youtube_to_mp3(url):
    yt = YouTube(url)
    video = yt.streams.filter(only_audio=True).first()
    output_file = video.download()
    base, ext = os.path.splitext(output_file)
    new_file = base + '.mp3'
    os.rename(output_file, new_file)
# Usage
youtube_to_mp3('https://www.youtube.com/watch?v=VIDEO_ID')

Метод 4. Использование API ytmp3.cc (Python)

import requests
def youtube_to_mp3(url):
    response = requests.get(f'https://www.ytmp3.cc/api/#https://www.youtube.com/watch?v=VIDEO_ID')
    download_link = response.json()['result']
    mp3_file = requests.get(download_link)
    with open('output.mp3', 'wb') as file:
        file.write(mp3_file.content)
# Usage
youtube_to_mp3('https://www.youtube.com/watch?v=VIDEO_ID')