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UDF format is simply just another way that CDs can be written.

What's a 'UDF' formatted CD?

ISO 9660 is the standard for CD's that has been used for many years defining how CD's are witten. UDF (Universal Disk Format) came along with DVDs and is being used on other media as well.

I found this article: Which DVD / CD format: ISO or UDF? that explains in a little more detail.

Article C2159 - August 20, 2004 « »

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Leo Leo A. Notenboom has been playing with computers since he was required to take a programming class in 1976. An 18 year career as a programmer at Microsoft soon followed. After "retiring" in 2001, Leo started Ask Leo! in 2003 as a place for answers to common computer and technical questions. More about Leo.

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4 Comments
Russell Cole
December 17, 2004 9:47 AM

I have a wedding video made for my daughters wedding and it will play in a computer dvd (not a cd player) but will not play in a regular dvd player for home use. Can you give me some idea why? It says under properties that it is a UDF file format. Is there any way to convert it so that it will.
Thanks

Alejandro
September 2, 2005 6:49 PM

Rip the dvd to your computer (the folders/you may need a program for this, google)
Copy files to another dvd (you may need to encode the movie again (nero does it, cant remember what part of the program)). Enjoy!

Rajamannar
March 19, 2007 5:41 AM

Please explain the following format

ISO 9660 level 1,2,3
CD HFS
CD/DVD UDF
High Sierra
Hybrid (ISO+HFS)
Multi-session CD
Mixed mode CD
UDF v1.5, v2.0

uzair
September 9, 2007 4:38 PM

can you format a UDF format CD. I mean can you erase it totally so you can add some other media in it.

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