Aiseesoft iPhone Ringtone Maker is your best choice in converting popular video/audio files, including MPG, MPEG, MPEG-2, VOB, DAT, MP4, M4V, TS, RM, RMVB, WMV, ASF, MKV, AVI, 3GP, 3G2, FLV, SWF, MPV, MOD, TOD, QT, MOV, DV, DIF, MJPG, MJPEG HD video and MP3, MP2, AAC, AC3, WAV, WMA, M4A, RM, RAM, OGG, AIF, AIFF, APE, FLAC, AU, NUT audio to iPhone M4R Ringtone.