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Noticeable loss of quality between ripped/original DVD?
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cptla999
Newbie
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29. March 2006 @ 12:49 |
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Maybe I am imagining this... It looks as if the picture is more grainy and the frame rate is a little slower. I am watching a copy of Walk the line, he used Dvdshrink to rip it.
Under the right settings, using the right programs, will anyone be able to notice the difference between a copy and original DVD on any TV?
I would imagine so being that the files are compressed quite a bit. Any way around this?
thanks,
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Senior Member
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29. March 2006 @ 14:08 |
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If DVD Shrink doesnt use any compression the quality should be very close to the original the more compression used the lower the quality
there are tools within shrink that try to compensate for this you will find them under the quality seeting tab after you hit the backup button the other options are to remove extras from your dvd special features, extra lanuage tracks subtitles etc in reauthor mode or burn to a dvd 9 disk if your burner supports its
The DVD Shrink guide is on my page follow the link in my sig
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cptla999
Newbie
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29. March 2006 @ 22:08 |
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what about using dual layer? I'm not too familiar with it, but I do know I have a dual layer burner.
Wouldn't I be able to fit twice the amount of information on a dual layer disc? When you go buy a DVD, is it dual layer?
Is there any difference in playback between a dual layer and single layer disc?
When I used DVD Shrink, under the video section, it was at 100%. Does this mean the file was not compressed at all?
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Senior Member
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29. March 2006 @ 22:44 |
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I dont use dvd 9 because neither of my burners support it but basicly all you need to is set the target size to custom I think it is 8400mb(someone else help me out here) under settings
but if compression read at 100% then no compression was used so look at media quality and burn speed for the poor quality of your backup
checkout the golden rules in my sig
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outdoor
Junior Member
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30. March 2006 @ 00:02 |
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I backed up walk the line on averb dl disc and I can't tell the difference in picture quilaty at all.I only have a sony 48 in screen though.Anything bigger and I couldn't tell you. Although I have comprassed to 70% and I still can tell no difference,but I do deep analizeing
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Bruce999
Member
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31. March 2006 @ 13:40 |
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cptla999:
Quote:
what about using dual layer? I'm not too familiar with it, but I do know I have a dual layer burner.
Wouldn't I be able to fit twice the amount of information on a dual layer disc?
Yes, precisely. The costs are still a lot higher for dual layer blanks, and the choices in media are much smaller. And, you may find yourself more restricted on which software to use (the dual layer discs have a layer break that must be placed precisely... some software excels at this, while other software has proven to be tougher to use with a dual layer disc).
As an example, when I purchase dual layer blank media, I always use Verbatim DVD+R dual layer discs. And, I always use DVDDecrypter to do a straight ISO read, to rip, and then I use DVDDecrypter to do a straight ISO Write, to burn, when I am dealing with dual layer discs. This seems by far to be the "safe" route. I know that most people failed when they tried to use DVDShrink with dual layer burns. And, early on, a lot of people had failures when they tried to use Nero for dual layer burns.
Quote:
When you go buy a DVD, is it dual layer?
Many are. Not all. Today, most of the major new releases (the major Hollywood mainstream feature films) tend to be pressed on a dual layer original commercial disc. A lot of independent films, and smaller films, and foreign films, and a lot of TV episode discs are still pressed on a single layer disc, though. Four years ago, this was all different, as almost every release was on single layer originals. In other words, it all depends...
Quote:
Is there any difference in playback between a dual layer and single layer disc?
There should not be, assuming all other things are equal. However, the reality is that there often is a visible difference, because of this:
IF I am backing up a typical recent release that is on a dual layer original, I can use NO COMPRESSION and it will all fit onto a dual layer blank disc. The quality (if done correctly) will be exactly as good as the original (if the burn is good).
IF, though, I am backing up a dual layer original disc onto a single DVD-5 (a single layer blank disc), I will have to use compression. I can choose to eliminate extras, and I may need to use less compression, but in most cases I end up using compression. ALL of this compression is "lossy." It will ALWAYS cause a decrease in picture quality. ALWAYS. If it is a small amount of compression, you may not notice. If you are viewing on a small enough display, you may not notice. But, the fact is that any compression = a definite decrease.
No compression = no decrease. (Assuming the media was high enough quality, and the burn was free of any burning errors, of course).
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When I used DVD Shrink, under the video section, it was at 100%. Does this mean the file was not compressed at all?
Hmmmm... IF DVDShrink reports a figure of "100%," and IF YOU ARE IN AUTOMATIC under the compression settings, then that means the original you have just analyzed will all fit onto a single layer disc, with no compression needed.
But, you mentioned "Walk the Line" above. I own this. I backed up my Region 1 edition of this same disc. That disc is definitely on a dual layer store bought disc. It will NOT report "100%" in DVDShrink.
So, the above statement is a bit confusing... can you double-check your experiences?
(By the way, I choose never to compress any of my backups. When I am confronted with a store-bought dual layer disc, I prefer to split, so most of the movie is on one single-layer disc, and the final part is on a second single-layer disc, along with all of the extras, as well. I noticed the compression early on, and decided that route was not made for people with large, carefully-calibrated video displays. high definition sets are more capable of showing you each and every flaw. Also, the larger the image, the more obvious each flaw will be. Even one of my kids noticed the compression artifacts on the first DVD I tried. I am in the minority, though... Almost everyone else around here prefers to compress.)
-Bruce
This message has been edited since posting. Last time this message was edited on 31. March 2006 @ 13:45
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cptla999
Newbie
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31. March 2006 @ 14:47 |
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Bruce,
thanks for the reply... I was referring to Paradise Now, not Walk the Line, sorry for the mixup. I should have been more clear. Paradise Now is a foreign film, and I am assuming it was on a single layer disc, which is why I was able to avoid compressing the file.
I do have a large high definition TV, and I have been able to notice a difference when it comes to compression. I think I will start splitting the burn on two single layer discs, as you said you did I believe, or burn a dual layer disc, to avoid compression.
Thanks again
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