pyffmpeg 
FFmpeg wrapper for python. It uses FFmpeg binary to provide both FFmpeg and FFprobe functionality (FFprobe functionality includes get_album_art). So you can kill two birds with one stone.
The beautiful thing about this is that it comes with it's own FFmpeg executable. It is compressed, making it the smallest one you can find. Becuase it's cross-platform and python 3, it is the only option available for building cross-platform apps with ffmpeg in python.
FFmpeg Version
Uses current FFmpeg version 4.4
Installation
pip install pyffmpeg
Usage
FFmpeg
from pyffmpeg import FFmpeg
inp = 'path/to/music_folder/f.mp4'
out = 'path/to/music_folder/f.mp3'
ff = FFmpeg()
output_file = ff.convert(inp, out)
print(output_file)FFprobe
Provides FFprobe functions and values
from pyffmpeg import FFprobe
input_file = 'path/to/music.mp3'
fp = FFprobe(input_file)
print(fp.duration)will print
> 00:04:32:32NB: The above digits are just for illustration purposes.
Wiki
The wiki can be located here
Contributing
Please read Contributing
Legal
This library uses prebuilt binaries of FFmpeg licensed under the LGPLv2.1 and can be downloaded via the following links: