Convert DVD to iPhone on Mac for Free!
Step 1: Add DVD video or audio files
Insert DVD to the DVD drive, and click "Load DVD" or "File" to load DVD folder or load ISO file or IFO file respectively.

Step 2: Set output options as MP4 for your iPhone
Select a proper output format from the drop-down list of "Profile" and a destination folder for your DVD files. Here we choose "iPhone 4 H.264 Video(*.mp4)" from the category of iPhone. Or you can choose "iPhone 3GS MPEG-4 Video (*.mp4)"for your iPhone 3GS.

Step 3 : Start converting DVD to iPhone on Mac
After all necessary settings just press the button of "Start" to start the conversion from DVD to iPhone MP4. You can view the conversion progress and preview converted video while converting. And the conversion time depends on the size of the DVD video.
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Related Tutorial: How to Put DVD Movie to iMovie on Mac?