How to add ffmpeg to embedded YouTube-dl on a server?

[ghost]

I am building a Flask application and using embedded YouTube-dl to download mp3 from YouTube, and it needs ffmpeg to be available to convert. So I made a folder in the app and placed ffmpeg inside and linked it in my python code, but It is showing an error. Is the error something to do with the YouTube-DL library or is it something to do with the way I placed the ffmpeg, and if so, how would I fix it?

`
from __future__ import unicode_literals
import youtube_dl


   class YouTubeMusic():


       def __init__(self, url):
           self.url = url

       def search(self):
        pass

ydl_opts = {
    'format': 'bestaudio/best',
    'ffmpeg_location': "static/ffmpeg/ffmpeg.exe",
    'postprocessors': [{
        'key': 'FFMpegExtractAudio',
        'preferredcodec': 'mp3',
        'preferredquality': '0',
    }]

     }

youtube_dl.YoutubeDL(ydl_opts) as ydl:
    ydl.download(['http://www.youtube.com/watch?v=BaW_jenozKc'])`

Fig 1. The Python Code

Traceback (most recent call last):
  File "YouTubeMusic.py", line 25, in <module>
    with youtube_dl.YoutubeDL(ydl_opts) as ydl:
  File "/Users/Vladimir/Documents/Code/Keef/venv/lib/python2.7/site-     packages/youtube_dl/YoutubeDL.py", line 376, in __init__
    pp_class = get_postprocessor(pp_def_raw['key'])
  File "/Users/Vladimir/Documents/Code/Keef/venv/lib/python2.7/site-     packages/youtube_dl/postprocessor/__init__.py", line 22, in      get_postprocessor
     return globals()[key + 'PP']
KeyError: u'FFMpegExtractAudioPP'

Fig 2. The error

venv) Admins-Air:keef Vladimir$ cd static/
(venv) Admins-Air:static Vladimir$ ls
ffmpeg
(venv) Admins-Air:static Vladimir$ cd ffmpeg/
(venv) Admins-Air:ffmpeg Vladimir$ ls

CONTRIBUTING.md     cmdutils_common_opts.h  ffprobe.c
COPYING.GPLv2       cmdutils_opencl.c   ffserver.c
COPYING.GPLv3       common.mak      ffserver_config.c
COPYING.LGPLv2.1    compat          ffserver_config.h
COPYING.LGPLv3      configure       libavcodec
CREDITS         doc         libavdevice
Changelog       ffmpeg          libavfilter
INSTALL.md      ffmpeg.c        libavformat
LICENSE.md      ffmpeg.h        libavresample
MAINTAINERS     ffmpeg_cuvid.c      libavutil
Makefile        ffmpeg_dxva2.c      libpostproc
README.md       ffmpeg_filter.c     library.mak
RELEASE         ffmpeg_opt.c        libswresample
RELEASE_NOTES       ffmpeg_qsv.c        libswscale
VERSION         ffmpeg_vaapi.c      presets
arch.mak        ffmpeg_vdpau.c      tests
cmdutils.c      ffmpeg_videotoolbox.c   tools
cmdutils.h      ffplay.c        version.sh

Fig 3. The ffmpeg location

[dstftw]

It's FFmpegExtractAudio not FFMpegExtractAudio.