Undersize problem

[djan]

Hi,

I encoded many movies and it's the first I got an undersized output. The undersize is 76 MB wich I think is too much !

What could be the problem ? Should I copy/paste my REBUILDER.ECL ?

Thx !

PS: Using 0.57 !

[jdobbs]

That means the disc is 98.2% full... That doesn't seem like much of an undersize. I've always considered 150MB as reasonable for a margin of error.

[djan]

But it's the first it happens after maybe more than 40 encodes ! Can't it be a m2v not encoded until the end accidentely per example pushing cancel while CCE encoding ?

[JDay]

If you accidentally canceled or interrupted the encode then the rebuild process would almost certainly fail. If it rebuilds successfully, then everything is probably ok.

[djan]

Yes, it rebuilded without fail.

[jdobbs]

Sometimes you see smaller calculated output on DVDs that have a lot of VTSs -- does the one you tried fit that bill?

[djan]

I always preprocess my DVDs and that one has only 2 VTS at output of preprocessing.

[erdoke]

Originally posted by JDay
If you accidentally canceled or interrupted the encode then the rebuild process would almost certainly fail. If it rebuilds successfully, then everything is probably ok.

One of the great features of Rebuilder compared to other tools is that it can contiunue encoding from last finished cell/m2v. I think that the rebuilding phase is totally independent of how the encoding was done as far as it went through without errors left in the video streams.

Heavy preprocessing can cause sizing difference though, maybe this is the case now.

[djan]

Hi,

I encoded the DVD again and it's undersized again. I think the compressibility of the movie is maybe very good. That's maybe the reason, I don't know.

[robot1]

Could you please open the rebuilder.inf with RB-Opt and check the "Predicted size" versus actual size you get after rebuilding?

[djan]

I already deleted all files ! Next time I'll think about.

[robot1]

Ok, thanks :)

[Toranaga]

My backups ALLWAYS comes out 100-250MB too small. I just did a backup wich as usual came out at 4.31GB. When I check DVD-Opt it says estimated file size is 4424MB.

I think 200MB wasted space is a bit much seeing as it is every time. I know my friend says the same thing. Dont get me wrong though. Still better than using Shrink :)

I will try to set the DVD to above 100%

[erdoke]

Originally posted by Toranaga
My backups ALLWAYS comes out 100-250MB too small. I just did a backup wich as usual came out at 4.31GB. When I check DVD-Opt it says estimated file size is 4424MB.

I think 200MB wasted space is a bit much seeing as it is every time. I know my friend says the same thing. Dont get me wrong though. Still better than using Shrink :)

I will try to set the DVD to above 100%

DVD+R size is 4482.9 MB. DVD-R size varies a bit, but usually it is 4489 MB. Your 4.31 GB is 4413.44 MB so the difference is ~70 MB. 70 MB is 1.55 % of the total DVDR space. I don't think it is too much to waste.;) Anyway you wouldn't get significantly better quality picture with that 70 MB.
If you still feel it is wasted, use RB-Opt to set custom size on RB output. I found it safe to set it up to 4480 MB, but it needs more than one pass VBR (I tried with 4 and 6).

[Toranaga]

How come I can burn up to 4.34GB on disc then?

[erdoke]

Originally posted by Toranaga
How come I can burn up to 4.34GB on disc then?

:)
The approximate MB values I gave in my previous post are all above 4,34 GB. That's why you can burn 4,34 GB on a DVD.
DVD-R size is 4,38 GB (4489/1024= 4,38) while DVD+R size is 4,37 GB (4482/1024=4,37). These are rounded values of course, DVD space is measured in sectors. If I remember correctly the sector size is 2048 bytes.

[robot1]

Originally posted by Toranaga
How come I can burn up to 4.34GB on disc then? Load the Rebuilder.inf in RB-Opt.
Select Global Options, and use the slider to raise the size.
If the result come out fine, you can use the TargetSectors value showed by RB-Opt in the Rebuilder.ini.
In the Rebuilder.ini, under the [Options] sections, use a row like this:
TargetSectors=2260000

[jdobbs]

Originally posted by Toranaga
My backups ALLWAYS comes out 100-250MB too small. I just did a backup wich as usual came out at 4.31GB. When I check DVD-Opt it says estimated file size is 4424MB.

I think 200MB wasted space is a bit much seeing as it is every time. I know my friend says the same thing. Dont get me wrong though. Still better than using Shrink :)

I will try to set the DVD to above 100% Arey you using OPV? I was guessing so, since you are getting 4.31GB. If so, I'd be hesitant to change it -- it's prediction isn't 100% accurate, and if you increase the target size you will very likely go oversized on some discs. To fix an oversize you will have to run the entire reencode again.

[Trahald]

An option Tylo has in d2sroba is if an opv encode is a certain % off (+/-), it would encode a second pass (1-pass of multivbr using the same vaf) .. of course that would slow down things and for some disks it could potentially take as long as a regular 2-pass (1+1) but would help some of the picky people. when the option is on a more aggressive qfactor can be used since there would be no fear of oversizing.

[dragongodz]

My backups ALLWAYS comes out 100-250MB too small. I just did a backup wich as usual came out at 4.31GB.
I think 200MB wasted space is a bit much seeing as it is every time
How come I can burn up to 4.34GB on disc then?
sorry to butt in but thought this needs clearing up.

the difference between 4.31gb and 4.34gb is not 200mb. 0.03gb is just over 30mb. even if you aim for 4.37gb then the difference is about 71mb.

so the statement of constantly being 200mb short is wrong for starters.

now some may see 70mb as too much waste but really you will struggle to notice any difference even if that is used. if you really must have it then increase the target size as robot1 said. try testing it both ways though and see how much difference you can see.

[Toranaga]

Geeze Louise you are right offcourse! I made a mistake, sorry dudes!

[robot1]

Originally posted by Trahald
An option Tylo has in d2sroba is if an opv encode is a certain % off (+/-), it would encode a second pass (1-pass of multivbr using the same vaf) .. of course that would slow down things and for some disks it could potentially take as long as a regular 2-pass (1+1) but would help some of the picky people. when the option is on a more aggressive qfactor can be used since there would be no fear of oversizing. In RB-Opt you can change a project from OPV to VBR and save. In this way, re-encoding with DVD-RB will run just the second pass in CCE (if you selected 2 passes), using the .vaf already created.

If we get a final size of 4.50 GB (per example), the total error is 0.13GB, and is the sum of all the errors of every cell
(considering error = encoded size - target size of the cell predicted by DVD-RB)
A better algorithm to implement could be this (hope to be clear, as it's difficult to express well in english for me...)
- check for every cell the difference between the OPV encoded and the target size.
- sort the cell according to the error on size.
- re-encode in VBR mode (second pass) the minimum number of cell till the cumulative error is near 0 (the DVD fits in a blank DVD-R)

If error is small enough, probably you will still save time versus a normal VBR 2-pass encode, having a perfect size.

[asia_minor]

Hi, apologies if this is wrong place to post, or if it's one of those "search the forum(s), several threads about it already/it's been answered alread" types of questions.
I am _very new_ to DVD-RB free edition.

I've also seen that 4.31 GB is alright by jdobbs. I'm wondering if there is a way within DVD-RB free edition to set it to output at the size of 4.36 GB (These burn fine for me). Or if it's an .ini thing or something. I'd like to get it to that output size to max out the disc. I'm also seeing things about settings such as Target Size but have no idea where these things are.

I'm using HC Encoder. Under DVD-RB AVS options menu, I've set "deinterlace" and "mpeg2source" items. Mode for HC Encoder is FAST (this is just for testing for now). I've already processed the VIDEO_TS source folder using PgcEdit (menu) and VobBlanker (some video). Entire source winds up to ~6.95 GB.

Any help would be well appreciated, as this looks like interesting software, and I'm trying something different from DVD Shrink.

Any other info needed, say so. Good day.

[asia_minor]

OK.... came across RBOpt and TargetSectors... preliminary analysis data changed a bit for higher percentage in reduction.... Maybe this is it?

[jdobbs]

Do a search for TargetSectors here in the forum. It is exactly what you want. But I recommend you leave the default to 4.32GB. There are very good reasons why that size was selected.

[techmule]

You can put

TargetSectors=2265000

in the rebuilder.ini under [Options], it has always given me 4.36 to 4.38 end size and has never exceeded the DVD5 capacity.