A file with the extension .F4P is an 'MP4' audio file utilised by 'Adobe Flash Player Version 9' and later versions.

The file name .F4P was designed to eliminate compatabilty problems between the Adobe Flash Player / Quicktime / iPod's / etc. whilst using certain .MP4 video/audio files.

Flash Player 9 allows you to enjoy the most expressive, engaging experiences on the Web that combine interactive, rich content with video, graphics and animation.