Install gstreamer1.0-fluendo-mp3 by entering the following commands in the terminal:
sudo apt update sudo apt install gstreamer1.0-fluendo-mp3
Description:
Fluendo mp3 decoder GStreamer 1.0 plugin
This GStreamer 1.0 plugin permits decoding of MPEG 1 audio layer III streams. It is derived from the ISO MPEG dist10 reference package. . This plugin differs from the GStreamer MAD plugin in that it doesn't depend on a GPL library.
Homepage: http://www.fluendo.com/shop/product/fluendo-mp3-decoder/
Version: 0.10.32.debian-1
Section: universe/libs