How to Convert Video to iPhone 4S on Mac
The following step by step guide shows you how to convert video AVI, WMV, MKV, FLV to iPhone 4S compatible video/audio format on Mac using Video to iPhone 4S Converter for Mac.
Step 1. Add Video Files
Download the latest version of Video to iPhone 4S Converter for Mac, install and run it.
Download Video to iPhone 4S Converter for Mac
This iPhone 4S Video Converter for Mac can help you convert video files in various formats to iPhone video/audio files. Just click the "Add Files" button to import the video clips stored on your Macintosh HD. Then you can get the video information in the manager panel.
Step 2. Output Settings
After the video files are imported, go to the "Output" panel. Click the "Profile" drop-down list to choose the output format. To convert video to iPhone 4S on Mac, just choose "Apple iPhone" in the drop-down list. From the subcategory, choose "iPhone MPEG-4 Video" and you will get the output video in iTunes friendly format ready for syncing to your iPhone 4S.
Note: You may not be satisfied with the profile provided to you. In this case, you can click the "Customize..." button next to "Profile" box to customize a profile. In the following "Profile Settings" Window, you can adjust Video Size, Frame Rate, Encoder, Bitrate; Audio Sample Rate, Channels, Encoder, Bitrate, etc to meet your specific needs.

Step 3. Start to convert
After all the necessary settings, just click the "Convert Now" button to start the Video to iPhone 4S Conversion process on your Mac machine.
Transfer Output to iPhone 4S
After you get the output files, launch your iTunes and transfer them to your library. Then you will be able to transfer the converted files to your iPhone 4S with the sync of iTunes.