File size discrepancy - DVD Shrink

[MaximRecoil]

I made a movie-only backup and with just title 1 and the English audio track it came out to 99.7%. Since I was so close to 100%/no compression I set the start point to 21 seconds into title 1, just enough to cut out the studio logo and that made it show 100% so I selected "no compression" and burned the movie. The movie came out fine and plays fine.

Last night I opened the DVD+R again in DVD Shrink and it showed 99.8% even though I originally burned that disc at "no compression" because it was showing 100%:

http://maxim.skyphix.com/998.jpg

If I ever need to transfer this backup to a different disc, will I be able to do it as-is or will it need further processing?

[Chetwood]

Originally posted by MaximRecoil
If I ever need to transfer this backup to a different disc, will I be able to do it as-is or will it need further processing?

From looking at the screenshot I'd say yes. But it's weird that a file that fitted on a DVD-R before now would require additional compression.

From what I've read at the DVD Shrink forums sometimes the resulting file size can differ from the estimated one, but this happens usually only when compression is applied. A workaround for this is to always use Deep Analysis which makes sure the predicted file size will be the resulting file size.

However, you did apply no compression so I have no idea how come. I suggest you hop over to the other forums and ask there cause there are a lot of die hard shrinkers...

[$$$]

DVD-R capacity is 4,488 MB whereas DVD Shrink targets 4,464 MB leaving a safety buffer to avoid overruns. Your disc size must be somewhere in the middle of that making DVD Shrink suggest a slight compression. So, your next transfer will be safe.

$

[ddlooping]

Hi all. :)

MaximRecoil, instead of cutting-out part of the title, another option would have been for you to use DVD Shrink "mixed-compression" ability, and to apply maximum compression to the end-title.

http://www.dvdshrink.info/mixed-compressions.php

[MaximRecoil]

In this particular case there was still stuff important to the story going on intermittently throughout the end credits so I didn't want to mess with that. The 21 seconds worth of film at the beginning showing nothing but an animated studio logo was expendable though.

Do you know why it worked out like that? Did DVD Shrink simply judge the file size of the part that I cropped out incorrectly? The total file size now on the backup that I made is 4471 MB.

[ddlooping]

The title size was probably based on DVD Shrink quick initial analysis.
Using Deep Analysis would have most likely yelded more accurate size prediction.

If you want to avoid both using Deep Analysis and risking oversized backups, the trick is once again to use DVD Shrink mixed-compression ability.

1) Apply "No Compression" to the whole title.
2) Use "Start-End" to isolate the end-credits.
3) Select "Automatic" as the compression setting.
3b) optional: Use "Deep Analysis" on the end-credits.
4) Use "Start-End" and select the whole title (minus the studio logo intro if you still want to get rid of it).

You should end-up with an uncompressed movie ("No Compression"), with a very small amount of compression ("Automatic") applied to the end-credits.
The advantages are:
- no need to fully analyze the whole title.
- as part of the title (end-credits) is on "Automatic", this will allow DVD Shrink to compress it just enough to reach the target size.

[MaximRecoil]

I'm not sure what doing a deep or quick analysis has to do with it. DVD Shrink needs to do a deep analysis to accurately determine the file size of the files that are sitting on the DVD? I can see how it would have something to do with it if we were talking about projected file size after compression, but the existing file size; it should be able to accurately display that the same way that Windows Explorer can, shouldn't it? Windows Explorer doesn't do a deep analysis to tell you exactly how large a file is.

[TheSeeker]

Im sorry but this has really gone on long enough. There is no situation in this world or the next, that would cause a movie that is currently on a dvd-r to NOT fit onto another dvd-r. Its not like it suffers from spontaneous file size growth. If its currently on a dvd-r then I can assure you with 100% accuracy that if you rip an image of it that that image WILL fit onto another dvd-r. Hence you will be able to copy to another dvd-r. Just rip to iso with dvd decrypter and burn that image with your burning app of choice. Easy as that. As for WHY it is showing as 99.8 percent i think $$$ hit the nail on the head with his explanation.

[MaximRecoil]

As for WHY it is showing as 99.8 percent i think $$$ hit the nail on the head with his explanation.I think so too.
Im sorry but this has really gone on long enough.When ddlooping responded, the discussion evolved into something else. His responses got me wondering why DVD Shrink can't read file sizes as accurately as Windows Explorer can without a deep analysis.
There is no situation in this world or the next, that would cause a movie that is currently on a dvd-r to NOT fit onto another dvd-r. Its not like it suffers from spontaneous file size growth. If its currently on a dvd-r then I can assure you with 100% accuracy that if you rip an image of it that that image WILL fit onto another dvd-r.I understand that. What I was mostly concerned with when I asked the question was that I had possibly overburned the DVD+R the first time, which can be hard on the disc drive, both during burning and during subsequent reading. If $$$'s post is accurate then this is not a problem.

[ddlooping]

Ok, in a nutshell: Windows Explorer neither tells you the size of the streams (video, audio, subpictures) nor does it cares/needs to know them.
DVD Shrink does, hence the required analysis. ;)

My off-topic adition to the thread was to let you know a simple way of avoiding oversizing when selecting "No Compression" on a borderline (in terms of size) title, when not using Deep Analysis.

[MaximRecoil]

Ok, in a nutshell: Windows Explorer neither tells you the size of the streams (video, audio, subpictures) nor does it cares/needs to know them.
DVD Shrink does, hence the required analysis.Thanks.
My off-topic adition to the thread was to let you know a simple way of avoiding oversizing when selecting "No Compression" on a borderline (in terms of size) title, when not using Deep Analysis.I wasn't complaining. Your suggestion was useful. Just trying to learn something here.

[ddlooping]

You're welcome. ;)

[Lagoon]

Once you have a burned DVD-R you don't need shrink to copy it, I would even recommend not using it to avoid any unnecessary processing error.


Just copy it with dvd decrypter in ISO mode.