youtube-dl python script postprocessing error: FFMPEG codecs aren't being recognized
<p>My python script is trying to download youtube videos with youtube-dl.py. Works fine unless postprocessing is required. The code:</p>

<pre><code>import youtube_dl

options = {
    'format':'bestaudio/best',
    'extractaudio':True,
    'audioformat':'mp3',
    'outtmpl':'%(id)s',     #name the file the ID of the video
    'noplaylist':True,
    'nocheckcertificate':True,
    'postprocessors': [{
        'key': 'FFmpegExtractAudio',
        'preferredcodec': 'mp3',
        'preferredquality': '192',
    }]
}

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

<p>Below is the output I receive:<a href="http://i.stack.imgur.com/g3mBo.png" rel="nofollow"><img src="http://i.stack.imgur.com/g3mBo.png" alt="enter image description here"></a></p>

<p>I get a similar error if I try setting 'preferredcodec' to 'opus' or 'best'.
I'm not sure if this is relevant, but I can run the command line counterpart fine:</p>

<pre><code>youtube-dl -o 'test2.%(ext)s' --extract-audio --audio-format mp3 --no-check-certificate https://www.youtube.com/watch?v=BaW_jenozKc
</code></pre>

<p>I've gotten a few clues from the internet and other questions and from what i understand this is most likely an issue with my ffmpeg, which isn't a python module right? Here is my ffmpeg version and configuration:
<a href="http://i.stack.imgur.com/0Uprn.png" rel="nofollow"><img src="http://i.stack.imgur.com/0Uprn.png" alt="enter image description here"></a></p>

<p>If the answer to my problem is to add some configuration setting to my ffmpeg please explain how i go about doing that.</p>

<p>This is a bug in the interplay between youtube-dl and ffmpeg, caused by the lack of extension in the filename. youtube-dl calls ffmpeg. Since the filename does not contain any extension, youtube-dl asks ffmpeg to generate a temporary file <code>mp3</code>. However, ffmpeg detects the output container type automatically by the extension and fails because <code>mp3</code> has no extension.</p>

<p>As a workaround, simply add <code>%(ext)s</code> in your filename template:</p>

<pre><code>'outtmpl': u'%(id)s.%(ext)s',
</code></pre>

python youtube ffmpeg youtube-dl