Now more and more people prefer enjoying DVDs on iPod,iPhone,PSP,Zune,Creative Zen,Mobile Phone and other digital portable devices.
You may meet such questions:
How to rip DVD to popular video formats?
How to capture favourite clips from DVD?
How to merge several interesting clips into one?
How to enjoy DVD on PSP without annoying black edges?
Follow me,I will tell you the esaist way.
Equation: DVD Ripper+ DVD Cutter+DVD Joniner +DVD Cropper=Aiseesoft DVD Ripper
Before I tell you details,you should download a Best DVD Ripper Software --Aiseesoft DVD Ripper and instal it.

1:DVD Ripper

Download Aiseesoft DVD Ripper then you can easily rip DVD to MP4, H.264, AVI, MP3, WMV, WMA, FLV, MKV, MPEG-1, MPEG-2, 3GP, 3GPP, VOB, DivX, Mov, RM, RMVB, M4A, AAC, WAV, etc. with super fast DVD ripping speed and excellent image and sound quality.

2:DVD Cutter

Click "Trim" to open the Trim window

Methods to set trim time:
Method 1: Enter the start time in the Start Time box and click OK, then enter the end time in the Set End Time box and click OK.
Method 2: Drag the scissors bars under the preview window when you want to trim, then the time will be shown in the Start Time box and End Time box for your reference.
After you set trim time, the length of the captured clip will be shown in the Select Length box for your reference.

3:DVD Joniner

If you want to merge the selected contents into one file you can check the "Merge into one file" option. As default the merged file is named after the first selected file (either a title or a chapter).

4: DVD Cropper

Click "Crop" to open the Crop Video window.
Crop by setting the crop values
There are four crop values on the lower right part of the crop window: Top, Bottom, Left and Right. You can set each value to crop your movie video, and the crop frame will move accordingly.

Additonal funciton:Capture favorate pictures from DVD movies.

Click "Snapshot" button and the current picture in the Preview window will be captured and saved.
Click "Folder" button to open the folder where the captured images are saved. As default the captured image will be saved at users' My Documents\Aiseesoft Studio\Snapshot.

For DVD Fans, Some more software.
Best Mac DVD Ripper Software-----Mac Video to DVD Burner-----Best Video to DVD burner