State and Local Government- Separating Audio from Video Files
From Help Wiki
Using Adobe Media Encoder
Use this method if you are wanting to just separate a video and file. If you are wanting to make a selection from the video and then export only the audio, you will need to use Premiere Pro.
Launch the Adobe Media Encoder application that is part of the Adobe Creative Cloud Suite.
Locate the file you are wanting to separate the video from the audio and drag it into the Queue panel in the Media Encoder.
Toggle the triangle beside the blue text under Format and select mp3.
Click on the blue text under the Output File and rename your file if needed and verify where the file is saving on your local computer.
Start the export process by clicking the green triangle.
After the export, open your file to verify that the export was successful.
You can then import this audio file into Audacity.