如何修改youtube-dl程序下载生成的.wav文件名为audio1.wav？

Got it, here are a few reliable ways to get your converted audio file renamed to audio1.wav instead of that long auto-generated name:

Method 1: Set Output Filename Directly in youtube-dl Config (Simplest) #

You can add the outtmpl parameter to your ydl_opts to define a custom filename template. This handles both the downloaded video (since you have keepvideo=True) and the converted audio in one step.

Here's the modified code:

from __future__ import unicode_literals
import youtube_dl

ydl_opts = {
    'format': 'bestaudio/best',
    'postprocessors': [{
        'key': 'FFmpegExtractAudio',
        'preferredcodec': 'wav',
        'preferredquality': '192'
    }],
    'postprocessor_args': [
        '-ar', '16000'
    ],
    'prefer_ffmpeg': True,
    'keepvideo': True,
    # Define custom output filename template
    'outtmpl': 'audio1.%(ext)s'
}

with youtube_dl.YoutubeDL(ydl_opts) as ydl:
    ydl.download(['https://www.youtube.com/watch?v=JpjEwIceVIo'])

This will save the video as audio1.webm and the converted audio as audio1.wav—no extra steps needed.

Method 2: Rename After Download (Keep Original Video Filename) #

If you want to keep the original video filename but still rename the audio, use Python's os module to rename the file after processing. Using extract_info() instead of download() lets you get the exact filename from youtube-dl's metadata, making this more reliable than globbing for files.

Check out this version:

from __future__ import unicode_literals
import youtube_dl
import os

ydl_opts = {
    'format': 'bestaudio/best',
    'postprocessors': [{
        'key': 'FFmpegExtractAudio',
        'preferredcodec': 'wav',
        'preferredquality': '192'
    }],
    'postprocessor_args': [
        '-ar', '16000'
    ],
    'prefer_ffmpeg': True,
    'keepvideo': True
}

with youtube_dl.YoutubeDL(ydl_opts) as ydl:
    # Extract info and download the file
    info_dict = ydl.extract_info('https://www.youtube.com/watch?v=JpjEwIceVIo', download=True)
    # Get the original filename (without extension)
    original_base = ydl.prepare_filename(info_dict).rsplit('.', 1)[0]
    # Construct the path to the converted WAV file
    original_wav = f"{original_base}.wav"
    # Rename to audio1.wav
    os.rename(original_wav, 'audio1.wav')
    print(f"Successfully renamed: {original_wav} → audio1.wav")

This keeps your video file with its original long name, while renaming only the audio to audio1.wav.

Method 3: Quick Glob-Based Rename (For Simple Use Cases) #

If you're running this script in a directory where only this WAV file is present, you can use glob to find and rename it quickly:

from __future__ import unicode_literals
import youtube_dl
import os
import glob

ydl_opts = {
    'format': 'bestaudio/best',
    'postprocessors': [{
        'key': 'FFmpegExtractAudio',
        'preferredcodec': 'wav',
        'preferredquality': '192'
    }],
    'postprocessor_args': [
        '-ar', '16000'
    ],
    'prefer_ffmpeg': True,
    'keepvideo': True
}

with youtube_dl.YoutubeDL(ydl_opts) as ydl:
    ydl.download(['https://www.youtube.com/watch?v=JpjEwIceVIo'])

# Find all WAV files in the current directory
wav_files = glob.glob('*.wav')
if wav_files:
    os.rename(wav_files[0], 'audio1.wav')
    print(f"Renamed {wav_files[0]} to audio1.wav!")
else:
    print("No WAV file found to rename.")

Note: This works best if you don't have other WAV files in the same folder, otherwise it might rename the wrong file.

内容的提问来源于stack exchange，提问作者Y V Sravan Kumar Reddy