DVD-9 TO DVD-5...EXPLAIN TERMS OF IT PLEASE

[JCVT-14-0]

Can any of you people explain to me what they mean of is "backing up your DVD-9 to DVD-5", mainly what is "DVD-9 to DVD-5", what is the diff.? also maybe it is that DVD9 is more size of content than DVD5 & its a conversion sort of thing?


Thanks in advance.



JC.

[yoda313]

https://www.videohelp.com/glossary

Check the glossary. Dvd 9 is dual layer - roughly 8gigs of storage space. Dvd 5 is singlayer 4.3gb actual space.

Most commercial movies are dvd 9. Since single layer discs are cheaper than dual layer recordables we back up to single layer discs. In order to do so you have to reduce the file size to fit on the disc.

Dvd shrink and other programs can do it. Though its not updated anymore so for newer copy protection yo need to rip first with dvd fab decrypter or ripit4me and then open the files with dvd shrink to get it to fit a single layer disc.

[JCVT-14-0]

Thanks, So its mainly a compression process....but how you explain this then, since DVD-9 is more size than DVD-5 then why did my SILVER LAYERED DVD-5 movie did not fit or ws able to burn into a GOLD LAYERED DVD-9 blank disc?

I was using ALCOHOL 120%, it copied it but it said it was too small, ripped data could not fit.
My main orig. movie disc was smaller in size than the copy disc which is bigger in size.
I know they said also in that glossary of terminologies that sometimes that is not the case but anyways.

JC.

[yoda313]

The process is called transcoding. What it does is reduce the video to fit a smaller size. It compresses a section of the movie without touching the entire movie if possible. Basically it will squish it down to fit the specified space by removing extraneous information.

Basically compression formats use ratios to reduce the amount of space it takes to store the video. Say you have a scen that is all dark. Well instead of representing every single pixel of the dark area the compression techniques uses a formula to save only part of the dark area. Then it tells the playback device that that one segment had 5 areas of black for every 1 that it saved as an example. It would pinpoint an area and estimate a reproduction of it to save storage space.

Now to the tech lords - YES I AM OVERSIMPLIFYING THIS. And yes I PROBABLY HAVE MISINTERPERTED this a little. BUT this is a generally idea of how compression technology works.

The same holds true for mp3 audio. It uses representations of the original file size and reduces it to a minimum value but is still recognizable as the original song.

Think of it as painting a picture. You can't paint EVERY SINGLE OBJECT in picture perfect detail. You represent what is in reality. You choose as much of the detail as possible and then draw it on the paper. So you know what it was like without having 100% of every possible point in that frame.


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Try dvd shrink - it's a really simple program that is straight forward to use and is specifically designed to compress down to a single layer disc. You can even save to an iso file and burn with a iso burning program.