One specialized Ringtone Creator app, we can create ringtone from video, audio. It allowed multiple of audio, video formats like below: Audio: mp3, m4r, caf, ogg, ac3, aiff, wav, flac, au, voc, wma, m4a, mmf. Video: mov, mp4, m4v. How to use Ringtone Creator-Ringer ? 1. Click folder button to add media file or drag file to app main view to add. 2. Set start, end time for ringtone. 3. Set fade in, fade out time for ringtone. 4. Preview and Create ringtone. If you have any suggestion & question Please email to us skysoftwarelee@gmail.com or Visit our support page. http://www.ccskynet.com/support