CCETargetSectors equivalent in MB

[btspm]

Is there a fixed relationship between the CCETargetSectors parameter and a size unit of measurement like megabytes, etc? I use 2260000 when there is nothing else on the original DVD and I usually get within 50 MB of the size limit. But when I want to preserve 200 MB or so of space to copy over DVD-ROM PC only extras and the like, it takes a lot of trial and error to find the correct setting each time.

So can anyone quantify the relationship for this noob? Anyone have a favorite setting x for y MB of extras?

Thanks all

[mrslacker]

sectors * 2048 bytes / sector = bytes

DVD-R 2,297,888 4,706,074,624
dvdrb target 2,236,400 4,580,147,200

Typical result for me with 3 pass CCE:
dvdrb result 2,266,840 4,642,488,320
result-target 30,440
DVD-R-target 61,488
DVD-R-result 31,048

So, to get closer I tried something like target+31,048-7,000=2,260,448

[wmansir]

As I stated in the Settings sticky I find DVD-RB output size doesn't match the TargetSectors value, though it is consistent in it's output size.

The easiest way for me to calculate a target size is to remember that the default value ( 2236400 ) consistently gives 4.32GBs (ok, sometimes 4.33).

So,

2236400
--------- X (target size in GB) = target size setting.
4.32GB

[btspm]

Thanks guys

I guess our math teachers weren't lying when they said we'd need this stuff someday.:D

[mrslacker]

In light of some recent (and ongoing) frustrations regarding oversized output, and the fact that this thread is linked in a couple of spots, I wanted to follow up on my original post.

I have since knocked about 1000 or more sectors from my original targetsectors. With 2,260,448, which I basically pulled out of a hat, I got the occasional oversized output.

I normally use CCE multipass encoding. Other encoders might not hit their target as accurately.

Also, my original values were obtained from an average of just a couple discs, and they were done with a much older version of DVD-RB. The changelog indicates numerous changes and optimizations to the sizing, and the rough formulas above probably aren't too accurate.

If you want to change this value:
1. Experiment.
2. Be prepared for the inevitable oversized disc.
3. Recognize the gains for what they are, marginal.