All DVD's are undersized

[Snakefood]

Hi,
i cant really do anything about it. I always want to have the movie to fit the dvd5 perfectly, however its ALWAYS undersized. Sometimes about 100 MB, sometimes even 300 MB if i use redistribution its undersized about 500 MB. Is there any parameter to get the right size and fit the dvd5? (4,3-4,37 gb?)

Thank you.

[blutach]

Have you changed your INI file at all?

What versions of the programs do you have (DVDRB and AviSynth)?

Regards

[Snakefood]

Have you changed your INI file at all?

What versions of the programs do you have (DVDRB and AviSynth)?

Regards

No i didn't.

DVDRB 1.26.5 Pro and Avisynth 2.5.8.0.
Using latest CCE SP2.

I even tried to prepare and edit the compression of the whole VTS to fit the movie on DVD5. But still, when the appropriate value was set (lets say 4,35 GB to fit the size) it got undersized after encode & rebuild to 4,29 GB.

Maybe i should say that i chose the Full Backup Mode and the DVD was reauthored (stripped extras, edited menu, stripped trailers and so on).

Thank you.

[jdobbs]

DVD Rebuilder is designed to create a DVD to 4.32-4.33GB. It does that purposefully in order to account for inaccuracies at the encode level and also to prevent writing to the outer (high probability of error) sections of the blank disc.

You can override the default sizing using the TargetSectors parameter (see the FAQ section of this forum). But I highly recommend against it. An additional 100MB is not going to make a noticable difference in quality -- but writing to the edge (where there is a long history of problems) certainly can.

Please note that when you remove parts of the disc you can also often run into encoder saturation. At that point the encoder refuses to add additional bits because it has created what it believes to be a perfet reproduction of the original and any additional space would be wasted. This is seen sometimes with CCE when you remove a lot of extras or run movie-only mode. You can force it to encode at the higher rate anyhow (in CCE SP) by adding "CCEAQM=1" to REBUILDER.INI.

[Snakefood]

Thank you very much jddobs for explanation.

[iNViSiBiLiTY]

jdobbs, i added CCEAQM=1 under options, but I still get an undersized DVD. The source was just 15mb oversized, so I tried encoding just the last cell, and it always comes out 80-100mb undersized.

[jdobbs]

Probably encoder saturation. You're asking the encoder to waste bits and it is designed not to do so.

I guess I just have a hard time understanding this fixation with pushing to the edge of the disc. It really serves no purpose when it doesn't improve the encode...

[iNViSiBiLiTY]

Hehe, well I always want to fill it to the max. And 100mb means atleast 50 kbps in quality difference. It's not noticable, but still... :P

Since I'm just 15mb over the limit, I could just reencode the menu. How do I do that without touching the video? Can it be done with DVD-RB?

[jdobbs]

It depends on which encoder you're using. For example, if you're using CCE you can just take the ECL information for the menus (they all start with "W" instead of "V") and put them into a separate ECL file -- then open it with CCE and encode -- followed by a rebuild.