Converting .mp4 videos to .mp3 format.
Converting MPEG-4 Videos directly to MP3 Audio Files (.mp4 to .mp3 conversion) is certainly possible and should be quite straightforward. It relates to users attempting to extract the audio track (MP3) from an MP4 video.
Use one of several media editing programs or (online) conversion tools, such as Helium Music Manager or MediaMonkey, which allow users to import MP4 videos and export them in MP3 format.
A set of audio and ripping utilities for Windows
Video converting software