You can select ‘No’, to not locate them manually and continue using the application with a larger array of file types. Audacity should automatically locate the FFmpeg libraries.In the Preferences window select ‘Libraries’ in the menu on the left.After you have installed the FFmpeg Library, close Audacity if you have it open and relaunch the application.Mac install instructions : use the lame_64bit_osx.pkg.Windows install instructions : use the FFmpeg v2.2.2 INSTALLER (.EXE).Use the following links to download the FFmpeg Library and install it:.It is recommended that you exit Audacity before installing FFmpeg. Instead, use the following instructions to download and install the free and recommended FFmpeg third-party library. Because of software patents, Audacity cannot include the FFmpeg software or distribute it from its own websites. The optional FFmpeg library allows Audacity to import and export a much larger range of audio formats including M4A (AAC), AC3, AMR (narrow band) and WMA and also to import audio from most video files.

Audacity ffmpeg library not working