There is a simple way and free way to convert video to MP3. You can do this with MP4 videos, MOV, and other video formats. VLC is a free software for Mac and PC that can extract MP3 from a video file.

How to Convert MIDI Ringtones for iPhones. The native file format for iPhone ringtones is M4R. In order to use MIDI ringtones on your iPhone, you must first convert them to M4R. You can use iTunes ...