100% compression=perfect copy...right?...

Discussion in 'DVDR' started by gitoy, Feb 26, 2010.

  1. gitoy

    gitoy Member

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    i use dvdfab to rip, shrink to encode, img to burn, verbatim...

    so why is it that my back up is not as clear?...or are my eyes playing tricks on me?...

    what say you?...
     
  2. cyprusrom

    cyprusrom Active member

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    Do you have just the free version of DVDFab, or the fully functional?
    If is full version and choose DVD-5, then your DVD will probably be compressed.

    If you expect to do no compression, you make a 1:1 copy,then you don't need DVD Shrink.
     
  3. gitoy

    gitoy Member

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    thanks for the reply cyprus...

    i have the free version of dvd, so i just rip the whole movie...then i reauthor in shrink...100% compression on only the movie...then burn only the movie in img...

    so you are saying the copy is not 1:1...?

    if not what is the best way?...
     
  4. dailun

    dailun Active member

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    A compressed copy is not 1:1 and will almost NEVER have the same quality as the original.

    A 1:1 copy is the ONLY way to preserve the quality of the original.

    If your source image is >4.7GB and your target is 4.7GB, you will have to compress.

    There is no such thing as "100% compression".

    Compression is expressed as a ratio, not a percentage.

    2:1 compression = the output is 50% the size of the source.
     
    Last edited: Feb 26, 2010
  5. cyprusrom

    cyprusrom Active member

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    When you rip the DVD with DVDFab, what is selected, DVD-5, or DVD-9?
    .
    [​IMG]
    .
    If you can select, DVD-5, it means your trial period hasn't expired yet.
    If that option is used, then DVDFab will "shrink" the movie and make it fit on a SL DVD, which makes the DVD Shrink step useless.
    After you rip the movie, how big is the Video_TS folder? If DVD Shrink reports 100% under compression settings,main movie only, then you don't have to use it at all...

    .
     
  6. gitoy

    gitoy Member

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    thanks for your input dailun...

    cyprus, i had dvdfab on dvd5...dvd9 has no compression, a lot better when reauthoring on shrink...so thanks again...

    i have to do a lot of reading on which is the best way to do all this on freeware...so could i rip, encode on shrink?...or could i do all this on dvdfab, without paying?...i see that hd decrypter is free, what does it do?...
     
  7. cyprusrom

    cyprusrom Active member

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    That makes sense...
    The DVDFab that you have now, when the trial expires, you'll be left with the free version, that only rips, no transcoding/shrinking(the only choice will be DVD-9).

    You can use DVD Shrink to do it all only for titles that are years old. For the new titles,no, DVD Shrink cannot handle the encryption(its update been dropped years ago).
    Rip with DVDFab and then DVD Shrink to compress, that would be my choice, since it is free.
     
  8. creaky

    creaky Moderator Staff Member

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    Don't forget DVD Rebuilder, there's a free version of Rebuilder and you can pair it with the free HC Encoder (i swear by HC and i use the paid version of Rebuilder but by all accounts the free version of Rebuilder is excellent). Rebuilder will give far superior results than Shrink and is very simple to use. However as it encodes (programs such as Shrink transcode) Rebuilder requires quite a modern machine.

    See here for some example runtimes of Shrink and Rebuilder ~ http://forums.afterdawn.com/thread_jump.cfm/836545/5050562 (see other posts in that thread too)
     
  9. garmoon

    garmoon Regular member

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    I know in Nero Recode that compression is listed as a percent. And a 100% compression means that no encoding will be needed before burning file to DVD5 disc. I've always thought the expression should be 0% compression when no encoding is needed. And yes an uncompressed file should be a 1:1 copy of said movie file. A SL DVD5 can be cloned to a SL exact copy on a SL DV5 blank. It's done easily with ImgBurn writing the files Fab ripped. If I'm mistaken please point out what, guys.

    @gitoy

    100% compression should be an exact copy of the file(s) in question. Maybe "perfect" is not the best choice of words. Burners do make errors, but in theory should look as good as the original. Heavily compressed discs will NOT look as good. Your uncompressed burned blanks should appear the same to you as the original. Mine do.

    nothing wrong with that procedure if it's DL disc being copied. And if disc is SL, then just use the files ripped with Fab and burn them with ImgBurn to a DVD5 blank verb. Your choice of media is superb. And Creaky is correct in mentioning DVDRebuilder as another tool in the box to help out. I do not use it tho. I mainly do "Movie Only" and use AnyDVD to get the movie started immediately. No searching for play buttton or start screens trick.
     
    Last edited: Feb 28, 2010
  10. cyprusrom

    cyprusrom Active member

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    The "compression setting" is a bit confusing,somehow, but pretty intuitive at the same time...which is pretty contradicting, right:)?

    Nero Recode I find it to be a bit more intuitive than DVD Shrink in that regard. Nero displays "Video Quality", pretty easy to figure it out. DVD Shrink displays "Compression Settings",which doesn't represent by how much the movie is compressed,is TO what percentage/size the title was reduced...some people would say 90% under compression settings would mean 90% compression, when in fact is a 10% compression, or compressed TO 90% of original size/quality.
     
  11. garmoon

    garmoon Regular member

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    @cyprusrom

    For me, any compression which is over 90%: actually compressed by over 10%) I will use the slow encoding and advanced analysis options in Nero Recode. A lot of movies now don't require much compression when the "movie only" option is used. I never watch the extra stuff any way. I always just select the 5.1 audio track and English subtitles. Everything else I dump or AnyDVD dumps.
     
  12. cyprusrom

    cyprusrom Active member

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    Same here- I don't backup a lot of DVDs anymore- but most have been done with Nero Recode, main movie only(I have maybe 4 or 5 DVDs out of hundreds that are full discs).I even cut out the credits on most of them.
    I find Recode to be one of the best parts of the entire bloated Nero package. It has worked well for me, in versions 6 and 7 that I use now.
     
  13. garmoon

    garmoon Regular member

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    I'm on Nero Suite 8 and satisfied.
     
  14. scum101

    scum101 Guest

    I don't use anything from nero.. haven't for 4 years.. and I don't miss it at all.
     
  15. garmoon

    garmoon Regular member

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    @scum101

    howdy paula. You know Nero isn't the devil incarnate. Recode is more than adequate. You start it and come back in less than 20' and you got a playable disc. Same thing with Nero Express -one push, immediate copy of a copy, on the fly, 6'. Then there's Nero Burning Rom which allows me the use of 3 burners simultaneously-sweet. It's the set it and forget it attitude that keeps me using it. All three above- push burn button, go have a drink, watch tv, sex, kick the dog, or whatever.LOL

    So keep 'em honest. :p
     

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