ImgBurn 2.5.0.0 changes .IFO/.BUP

[geohei]

Hi.

I author DVD-9s (DL) with Adobe Premiere 2.0 and export to a folder.
I burn with ImgBurn 2.5.0.0 option "Don't update IFO/BUP files" enabled.

Nevetheless, ImgBurn changes all .IFO/.BUP files?

Any idea why?

Thanks,

[guns1inger]

Do you set the layer break in Imgburn ?

If so, that's why.

[geohei]

Hi.

What do you mean by that?

When I select the VIDEO_TS folder, the "Create Layer Break Position" window pops up right away. It requests me to select the position (which I do by clicking on the yellow stared LBA line).

What should I do at this stage?

The layer break was already set while authoring with Encore.

Thanks,

[MOVIEGEEK]

Do you have "IFO/BUP 32K Padding" enabled in the Build tab?

[guns1inger]

I would trust Imgburn's layer break over Encores, only because Imgburn's is based on the actual writing process. Layer breaks can only go in certain positions when burning to disc, and these positions may be different to what is available when mastering for pressing.

[LIGHTNING UK!]

If it's changing the IFO's when 'Don't update IFO/BUP files' is selected then it's not changing them for anything to do with the layer break.

It's probably changing them to correct the various pointers that tell the player where the start/end of certain data is. This feature is know as 'Get VTS Sectors' in programs like IfoEdit.

[hech54]

Straight from the horse's mouth....

[geohei]

Do you have "IFO/BUP 32K Padding" enabled in the Build tab?

Yes, I have it enabled. Is this the reason why the IFO/BUP files differ?
What's the purpose of the "IFO/BUP 32K Padding" feature?
When should I use it and when not?

TIA

[geohei]

If it's changing the IFO's when 'Don't update IFO/BUP files' is selected then it's not changing them for anything to do with the layer break.

Understood!
But why is IB asking to set the layer break (using the "Create Layer Break Position" window) when 'Don't update IFO/BUP files' is selected. This option implies that the layer break is not touched, hence making a new definition of the layer break obsolete. Or what do I miss here?

It's probably changing them to correct the various pointers that tell the player where the start/end of certain data is. This feature is know as 'Get VTS Sectors' in programs like IfoEdit.

Why does IB modify these pointers?
Does Encore not set these properly?

Thanks,

[LIGHTNING UK!]

The layer break is a physical thing, it's not something you set in a bunch of IFO files.

You have to pick somewhere for it to be placed (with nice alignment of the DVD Video content) and then update the IFO files (flagging the cell as non seamless - unless you tell the program not to) based on the position you've selected.

IB modifies them because otherwise the disc might not play.

Sometimes the pointers are right for everything being sequential, but not for content that has had 32k padding applied to it. Every project is different.

If you want to know what's being changed, just compare the files in a hex editor and then look up those offsets in the online IFO documentation (Google it) or via IfoEdit.

In any case, it's nothing to worry about and is totally 'by design'. Move on to worrying about other (more important) things

[geohei]

Thanks for the reply.

The questions are more out of interest rather than real concern

What does "IFO/BUP 32K Padding" actually do to the IFO files and when should it be enabled?

Thanks,

[LIGHTNING UK!]

It keeps them (the IFO and BUP files from the same VTS set) an ECC block apart.

So if the block gets damaged, it doesn't wipe out both files and leave the disc in a non working state.

You can Google for more info.

It should be enabled all the time - that's the default setting - and the default settings are the best.