Question: DVD +R and DVD+RW maximum capacity

[Jestak]

Greetings,

I know this is not good to put data to the maximum of the DVD capacity. But I am curious to know and I would like to do some testing.

Can someone tell me EXACTLY what is the maximum capacity in KBs (i.e.: 4464MBs= 4,571,136 KBs seems to be the number used by most softwares) of a DVD+R and a DVD+RW? I think this is not the exact same thing for each different format.

I saw different answers from different people, but I would like a confirmation.

Thank you

[sacajaweeda]

It all depends on whether you're counting a megabyte as 1,000,000 bytes, or counting correctly. (1,048,576 bytes)

[rcb]

from the glossary:

DVD-5
DVD-5 is a single sided single layer DVD that stores up to about 4.7 GB = 4 700 000 000 bytes and that is 4.38 computer GigaBytes where 1 kilobyte is 1024 bytes(4 700 000 000B/1024 = about 4 589 843KB/1024 = about 4485MB/1024 = about 4.38GB) . Video DVD, DVD-R/W and DVD+R/W supports this format. Often referred to as "single sided, single layer". DVDRhelp DVD information

dvd+r and dvd+rw capacity - same standard.

[ghoster]

wonder if Jestak ever thought of searching for it? amazing what you can find that way....

[tompika]

DVD-5
DVD-5 is a single sided single layer DVD that stores up to about 4.7 GB = 4 700 000 000 bytes and that is 4.38 computer GigaBytes where 1 kilobyte is 1024 bytes(4 700 000 000B/1024 = about 4 589 843KB/1024 = about 4485MB/1024 = about 4.38GB) . Video DVD, DVD-R/W and DVD+R/W supports this format. Often referred to as "single sided, single layer". DVDRhelp DVD information

Actually the plus is 6MB less

Blank DVD-R/W 4,489MB 4,706,074,624 bytes or 4.383GB
Blank DVD+R/W 4,483MB 4,700,372,992 bytes or 4.377GB

(source http://mrbass.org/dvdburn )

[Jestak]

Greetings,

(Yes, I searched, and like I said, there are different numbers. I could have posted the different numbers, but I wanted "objective" numbers. )

DVD-R/W 4,706,074,624 bytes
DVD+R/W 4,700,372,992 bytes

Are the most credibles numbers I found. But some people said the +R and +RW are holding a different number of bytes.

Thank you for your help!

[tompika]

But some people said the +R and +RW are holding a different number of bytes.

They don't...

[Jestak]

Greetings,

(I think my last message did not go through, so I'll repeat it)

I think DVD Shrink (or recode) has 4464 MBs pre-set to fit the DVD. So, does that mean the maximum would be in fact 4482?

thank you

[tompika]

https://www.videohelp.com/forum/viewtopic.php?p=724640#724640

[Jestak]

Greetings,

Thank you for the link, I already read it, but it made things clearer now. To recap, here is what I understood:

- A disk can hold 4,700,000,000 bytes maximum per the industry.
- The softwares say 4464 MBs maximum: 4464*1014*1024= 4,680,843,264
- The message board says you can have a maximum of 4482 (4483 - 1 MB) on disk: 4,699,717,632

Of course, the encoding softwares are doing an approximation, so in fact, for a dvd, you might set the target at 4500, for example, and it will give 4482.

Another quick question: I always create an ISO image (Done by IMGTool) from the VIDEO_TS folder. Must I base the maximum assumption from the VIDEO_TS folder or can I base it on the size of the ISO image?

Thank you

[Jestak]

Greetings,

I did some testing yesterday and here are my conclusions:

I used DVD+RW disks.

I used Nero Recode and DVD Shrink. I used 4 different movies:
- Babylon 5 season 1 disk 2
- T3
- Resident Evil
- Ice Age

I set up both softwares at 4482.
Only Ice age had under 4500 9When I removed the normal screen track), so no compression. Everything worked fine.

Then I removed 2 tracks on the Babylon 5 dvd and the compression was at about 98% (almost nothing). Both with Recode and DVD shrink the end result was 200 megs over and it was impossible to write. Then I removed some stuff to make the compression at 88%. No more problem.

So, I concluded that if I have a very low compression, it may be a problem. I did the same thing with T3 and resident evil, removing tracks. Both gave me the same problem. Around 200 megs over. I tried also with Black hack down disk 1. I removed some tracks to have the compression ration over 95%. Same problem, 100 Megs over.

I hope this small test will help some of you.

Thank you