From Aiseesoft Studio:
Aiseesoft iPhone 4 Ringtone Maker is the perfect software which can help you make iPhone 4 ringtone from your various video/audio files, including MPEG, VOB, MP4, TS, RMVB, MKV, AVI, MOD video and AAC, AC3, WAV, WMA, M4A, RM audio. It has the ability to convert any video and audio to iPhone 4 ringtone M4R. What's more, this iPhone 4 Ringtone Maker is compatible with multiple iOS devices such as iPhone 5, iPad 4, iPad Mini, iPod Touch 5 and iPod Nano 7 now.
It enables you to customize and manage the output iPhone 4 ringtones. For instance, you can trim the loaded video/audio length and convert any video segment to the iPhone 4 ringtones. With this software, you are allowed to remove and rename the added iPhone ringtone directly. Also you can export the iPhone 4 ringtones to computer, iTunes and even other iPhone devices. Besides, it has the function of transferring the converted ringtone to iPhone 4. What's more, you can also transfer iPhone 4 ringtones to PC, iTunes and other devices. It support the pre-listen function to help you pre-listen the sound of the video/audio sources and the converted audio before generate ringtone.