I'm a HD fan and I have about 700G HD video which include 720P, 1080P and blue ray DVD. These are not too much for a professional HD fan actually.

In order to watch HD video on my iPod Touch I have tried many HD video to iPod converters, but there are always errors (like the black frame).
Recently I found a good way to convert HD video to iPod Touch with an iPod Touch video converter and the special parameters setting.
If you also want to put your favorite videos on iPod Touch just follow these steps:

Step 1: Download Aimersoft video converter and open it

http://download.aimersoft.com/aimer-video-converter_full68.exe

Step 2: "Add" video files

Step 3: Video Parameter Settings
Use the data in the picture below to adjust parameters

Step 4: "Edit"
This step is very important, you need to import the right parameter to play video on iPod in full screen.

We can see the second data behind "cropped area size", it's the height of the original video, multiply it by 1.5 you can get the right width (the first data behind "cropped area size")of output video. For example: original video (width 1280, height 528), multiply 528 by 1.5 is 791, so you get (width 791
and height 528).

After video cropping you will find the video picture is a slight slanting in the "Output Preview", just drag the picture in the "Original Preview" to the right, divide the data behind "left" by 2 and retype it. (489/2=244)

"OK", Start conversion.
Note: If the video has external subtitle, make sure the subtitle file name is exactly the same as the video file name and the two files are in the same folder.