How can you put a dvd on the computer to tranfer it to a mp4 player.?

 If the DVD is copyrighted, you can't.

I recommend you Eztoo DVD Ripper.It's the most powerful software I have used before.It supports all popular video and audio formats and it's easy to use.You can edit your DVD as you like,and you can put DVD to iPod,iPhone,Apple TV,Zune,PSP and other mobile devices.You can have a try. http://www.eztoosoft.com/eztoo-dvd-ripper.html for mac user: http://www.eztoosoft.com/eztoo-dvd-ripper-for-mac.html

You may try this dvd converter, it can convert DVD to mp4 video, then you can add the mp4 video into windows media player and sync it to your player. If you don't know how to convert DVD, here is a step by step guide for you

http://www.freedvdripper.net/guides/rip-dvd-copy-dvd-converter-dvd-edit-dvd.html

You can use USeesoft DVD to MP4 Ripper, it is a super DVD to MP4 Ripper which can rip DVD to MP4 at super fast speed and best video quality.
Download at: http://www.useesoft.com/products/useesoft-dvd-to-mp4-ripper.exe
For more information, please visit: http://www.useesoft.com/dvd-rippers/dvd-to-mp4-ripper.html
If you want to know more good rippers&converters,please load: http://www.useesoft.com

You can try : BestHD Blu-ray To MP4 Converter

http://www.besthdsoft.com/blu-ray-to-mp4-converter.html

Just take the following steps, the video can be shown on your mp4 player.

Step 1: Download this software from the above website.

Step 2:Click add button to load Blu-Ray/ DVD into Blu-Ray DVD Ripper, the file titles would be shown in the information list.

Step 3: Select output format

Click "Profile" drop-down list to choose output format from different pre-set groups.

Step 4:Adjust video settings

Switch to Tools->Settings panelor directly Click setting button you can adjust the video size, video quality, channel, audio quality, and specify the output path. Click “OK” to confirm the settings.

Step 5:Rip Blu-ray DVD

Click Action->convert or directly Click start button to start convert you'll see the ripping process of Blu-ray DVD to the format which you need with amazing speed. A moment later, you'll get your satisfactory conversion.

Hope this can help you.