Youtube-dl python module missing ffprobe or avprobe
<p>I am just trying to run the example of converting youtube videos to mp3. 
  Here is the code:  </p>

<pre><code>from __future__ import unicode_literals
import youtube_dl

def my_hook(d):
    if d['status'] == 'finished':
        print('Done downloading, now converting ...')

ydl_opts = {
    'format': 'bestaudio/best',
    'postprocessors': [{
        'key': 'FFmpegExtractAudio',
        'preferredcodec': 'mp3',
        'preferredquality': '192',
    }],
    'progress_hooks': [my_hook],
}

with youtube_dl.YoutubeDL(ydl_opts) as ydl:
    ydl.download(['https://www.youtube.com/watch?v=GwR3pWbKaLE'])
</code></pre>

<p>But I keep getting this error:</p>

<pre><code>youtube_dl.utils.DownloadError: ERROR: ffprobe or avprobe not found. Please install one.
</code></pre>

<p>So I tried placing the <code>ffprobe.exe</code> and <code>avprobe.exe</code> in the youtube_dl directory. Still I get the same error. 
Any idea on how to make the conversion work?</p>

<p>You must placed ffmpeg.exe and ffprobe.exe into your youtube-dl project directory root. This works fine.</p>

python youtube youtube-dl ffprobe avprobe