The article includes two parts.
Part 1: Rip DVD movie to iPod (Windows)
Part 2: Convert AVI, WMV, MPEG, RM, RMVB, ASF, MOV, DivX, XviD, MPG to iPod MP4 or H264 format (Windows)
[1]How to rip DVD to iPod (Windows)
1. Download the latest version DVD to iPod Converter + iPod Movie/Video Converter Suite at dvd to ipod, ipod Video Converter, dvd to ipod suite and install it. You can download about it by referrring here.

2. Run the DVD to iPod Converter, load your DVD by clicking 'Open DVD' button or choosing 'Open DVD' from 'File' drop down menu. One or several titles appear in the list after loading DVD.

3. As usual, the longest title is the main file of the movie. You can remove the title you don't like to convert by unchecking the title. Set 'Subtitle', 'Audio Languages' to what you like.
4. To 'Output Folder', Enter the full pathname or choose the path where you want to save your video files by clicking the related button.
5. Click 'Convert' button to start the iPod DVD conversion.
6. Find the .mp4 file that DVD to iPod converter created and drag it into your iTunes library, or select 'Add File to Library' from the 'File' menu and select the encoded movies. Now you can watch it with iTunes or Quicktime Player on your PC.
Tips: Download iTunes 7+quicktime Player package from Apple - QuickTime - Download.
7. Load the MP4 files to iPod by clicking 'File -> Update iPod'. Now, you can enjoy the movies on your fifth generation video iPod anywhere and anytime.
[2]How to convert iPod video, such as AVI to iPod, WMV to iPod, MPEG to iPod, RM to iPod, RMVB to iPod, ASF to iPod, MPG to iPod, DivX to iPod, XviD to iPod video using "cucusoft iPod Video Converter + DVD to iPod Suite". (Windows)
1. Download the latest version iPod Video Converter + DVD to iPod Converter Suite, and install it. For more features about it, visting here
Related download
* To convert RM/RMVB real media files to iPod, Maybe need to install Realplayer: RealPlayer - The best audio and video player - Real.com.
* To convert WMV, ASF to iPod, Maybe need to install Windows Media Player: Microsoft Windows Media — Your Digital Entertainment Resource.
2. Run iPod Video converter component. And load the video files you'd like to convert by clicking 'Open file' button.

Click 'Output' and choose the pathname where you want to save your video files. Click 'Convert' to start converting video to iPod MP4 or H264 files.
Tips: Before converting, you can click 'Advance -> Video settings' to set 'Video format', 'Resolution', 'Framerate', 'Output Quality'. If you'd like to convert video to H264 files, please set 'Video format' to 'H.264 FQ Variable Bitrate'. 'MPEG4(.mp4) FQ Variable Bitrate' is the default value. Certainly, you can also set 'Audio Bitrate', 'Channels', 'Sample Rate' and 'Volume' in 'Audio Settings' page.

As usual, we set "Resolution" as "320x240" (i.e. default settings), certainly you can also choose other video sizes you like.
3. After converting, you can open the output folder to check and play the iPod video files (.mp4 or .mov) using Quicktime Player (Freeware, Quicktime Player+iTunes downloading address Apple - QuickTime - Download .
4. Transfer the iPod videos to iTunes by draging or clicking "File -> Add File to Library". Now, you can enjoy them on iTunes. Then hit "File -> Update iPod" to sync to your iPod.
Buy Cucusoft iPod Video Converter + DVD to iPod Converter Suite
Download Cucusoft iPod Video Converter + DVD to iPod Converter Suite

It could help you convert any DVD/video to the format with only one step. Also it let you set the movie effects, crop/ trim video.

iPod can only play mp4 videos. If your videos are the right videos, you can transfer them to ipod directly with iTunes. If your videos (or DVD) are not the right formats, you need to convert them to iPod MP4 formats with a converter:
dvd to ipod, ipod Video Converter, dvd to ipod suite .

You must make sure the video is mp4 format for iPod. Here is converter about converting DVD, Videos, Flash and Youtube videos to iPod video
dvd to ipod, ipod Video Converter, dvd to ipod suite
Some useful information about iPod video you can get on the Apple official site:
Apple

You need to convert DVDs or videos to iPod formats with a converter: dvd to ipod, ipod Video Converter, dvd to ipod suite .

You can download this tool, this is the best video converter for ipods, its the most widely known too,
dvd to ipod, ipod Video Converter, dvd to ipod suite .

You can download this tool, this is the best video converter for ipods, its the most widely known too,
dvd to ipod, ipod Video Converter, dvd to ipod suite .

I've tried different conversion programs, some of them worked good for me.

You need to convert DVDs or videos to iPod formats with a converter: dvd to ipod, ipod Video Converter, dvd to ipod suite .

You need to convert DVDs or videos to iPod formats with a converter: dvd to ipod, ipod Video Converter, dvd to ipod suite .