Convert MP4 to M4R
If you have many MP4 files and want to convert them to M4R, here I recommend this powerful MP4 to M4R Converting Program.
It supports to convert a wide range of video and audio formats such as MPEG, WMV, MP4, DivX, MOV, RM, AAC, WMA ect. Meanwhile, pre-listen, upload to iPhone directly are supported as well!
 For Mac |
For Window |
How to Convert MP4 to M4R?
Free download MP4 to M4R Converter and import files
by clicking the button 
.
Extract segments from the source file by dragging the sliders or by setting time value.
Set output path by clicking the button "Browse" in the "Local Output Folder" option.
Click the button "Convert" to start converting.
It will finish converting in no time, then you can enjoy the versatile iPhone ringtone with ease!