dvd size

Hi i noticed the output file size of dvds that get processed through RB is about 4.3, i know that it is a bad idea to write on dvds to close to the edge, but i was wondering if it would be a good idea to increase the output size, so i can squeeze a little bit more quality out of the dvds.

thanks

 

4.3g is the most you can get on a single layer, there is not need to increase the size it the output file is correct. You will not see any increase in quality because it would be minimal. If you want more then use a dual layer and then you will have a 1.1 backup. Otherwise using RB you are getting the best quality on a single layer possible.

 

correct me if im wrong, but i thought dvd discs have 4.7g where does the extra .4 gigs go?

 

The 4.7 GB capacity claimed on DVD packaging means 4.7 is figured on 1000k/Mbytes instead of the actual 1024k/Mbytes that a computer uses so you only will have 4.3g on the disk instead of the claimed 4.7g.

 

ohh ic, thank you so much for the info.

greatly apreciated

 

You are welcome

 

No, you actually do get exactly the space the package "claims", ie 4.7 billion bytes of storage.

 

:\

 

The DVD size is based on a 1000 based system rather then 1024 (which is the true size system) I do not agree personally that DVDs should be labeled 4.7GB, as they only truely hole 4.36GB. Let me do some math for you to explain a little better.

1000 based system
1000bytes/1Kb
1000Kb/1Mb
1000Mb/1Gb

so according to this system the DVD should have 4.7 Billion bytes of information.

Now lets take that number and put it into the true size specifications

1024bytes/1Kb
1024Kb/1MB
1024MB/1GB

so 1024³x4.7

this is equal to 5046586572.8 bytes

but a dvd only holds 4.7 billion bytes, so we work out

4,700,000,000
/
1024³
=
4.37.........ect

now count in lead in/out and minus about .01GB for that, So by true size specifications, the accual amount of data that can be held onto a DVD is 4.36GB with lead in and out (for compatibility).

I hope this answered a few questions of why the disc is not being used to the full "4.7GB".

 

Thank you ireland, my definition was not as clear as yours

 

Look, I don't need a lesson. Read my post! It says:

Sure, the PC calculates one GB differently. So what? The packaging states the number of BYTES on each disc. A byte is a byte, so no matter how you calculate one GB, the total number of bytes on the disc stays the same. Fill up a DVD, check how many bytes the files are. I'll bet that the number is pretty damn close to 4.7 billion just like the package promises.