Guide for you to convert video to iPhone4 may give some help during the conversion. You can use the Aimersoft Media Converter to convert AVI, VOB, FLV to MP4 too.

1. http://www.mediaconverter.biz/guide/convert-video-to-iphone-4.html
How To Convert Video to
iPhone 4
Aimersoft Media Converter, an innovative DRM removal software
for you to convert video to iPhone4, can remove
DRM protection from movies and music on demand
and other DRM protected media center legally.
This program has a very easy-to-use and simple request that helps
even the most amateur user. So there is no need for you to worry
about its operation of converting video to iPhone 4.
Let's follow the simple guide below.
Guide: How to Convert Video to iPhone 4
Step 1: Run the converter after you have installed this software.
Step 2: Choose your video files by clicking the "Add" button.
Copyright@ by summy

2. http://www.mediaconverter.biz/guide/convert-video-to-iphone-4.html
Tips: This converter can also convert AVI to MP4, convert FLV to
MP4, convert VOB to MP4, etc..
Step 3: Choose iPhone MPEG-4 (*.mp4) format by clicking the
"Setting..." button pointed by the red arrow.
Step 4: Click "OK" to finish the whole conversion.
OK, that's all!
Copyright@ by summy

3. http://www.mediaconverter.biz/guide/convert-video-to-iphone-4.html
Come to download this Aimersoft Media Converter software, then
you are able to convert your favorable video to iPhone 4. Don't miss
such a good video to iPhone 4 converter!
Copyright@ by summy