I am sorry,
I want to copy my Uncle's DVD9(12.5G) to Two DVD5,
Which can play on my DVD player,
Has some body can help me?
Thanks!

A DVD-9 cannot hold 12.5GB.
What type of files are on this disc?

a dvd 9 is 8.5gb so plz give more info

I am sorry,
It include two DVD9, copy to the computer size is 12.5G
One DVD9 is 7.67GB.
Do you have any good suggestion?

Start with 1 DVD-9.
Open it in DVD Shrink. Re-author the DVD the way you want it. Removing languages you don't need and anything else you don't need will help with compressing it down to a DVD-5. You may even find that your re-authored DVD doesn't need compression however when re-authoring DVD Shrink will not allow you to keep the menu.
If you want to keep the menu, start with VobBlanker to blank what you don't want and to remove the languages you don't need. Then open with Shrink.
You can use Shrink on the whole disc the way it is but you may not like the results. There will be a significant loss in picture quality.

dialysis1, Thanks very much,
I will have a try!

Thanks dialysis1,
May be I foolish or some wrong, I can't burn them successfull,
They can't open them on my DVD player!
I find some software from Net,
and I tried Pavtube DVD copy,
It said can Copy DVD9 to DVD9, but It can't copy DVD9 to DVD5,
and I buy some DVD9 disc.
I am very exited to found that my burned DVD9 can play on my TV and the quality is good!
But it is a shareware and for $35 to buy it!
I am Lucky，
Pavtube DVD Copy for free to make 5 DVD copies in the first month without watermark.
If some body want to copy DVD9, you can find it here:
http://www.pavtube.com/dvd_copy/

backing up dvds is what you are after. Till now, I was under the impression they were home brew dvds. So for store bought movies,

Look here, espesially the free methods spelled out


http://forums.afterdawn.com/thread_view.cfm/622748

Quote:

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Till now, I was under the impression they were home brew dvds

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Oddly enough i had a similar impression.

Use iluvendo's link for all the best options.