Actually this is totally wrong. M4P files and copy protection are two totally different things. It just so happens that apple decided to use this file format for their music and develope a copy protection for it. MP4 and MP3 are popular video and audio file formats. Sometimes, you may need to extract the audio from an MP4 file and convert it into an MP3 file for compatibility or editing purposes. FFmpeg is a powerful tool to do this, but it can be intimidating for non-technical users. MP4 is a new popular format for video and audio. Converting an MP4 file into an MP3 file converts the audio portion of the MP4 into an MP3 file. For example, you have a movie file in MP4 format. You want to separate its background music and store the background music as a file. You can use this tool to convert the sound portion of a video file. Step 2: In the following window [ Open Media ], go to the tab [ File] and then click on [ Add] to select the target MP4 file. After that, click on [ Convert/Save ]. Step 3: Next, select the option [ Audio-MP3] in [ Profile ]. Step 4: Click on [ Browse] to select a destination file. Finally, click on [ Start] to convert the MP4 video/audio to Part 4. How to Convert MP3 to MP4 with Image. To make your music file look more interesting and appealing, you can add an album cover, a band picture, or any other image. So when you convert your MP3 files to MP4 format, you can add a needed image. Listed below are the top online tools to convert MP3 to MP4 with images. 1. Tovid dP2zEgU.