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Video Manager Group IFO (VMGI)

The VMGI is the primary IFO containing all the metadata about the entire DVD. Or, aka IFO zero.

Files are a normal IFO file, the first one on the disc, being VIDEO_TS.IFO and VIDEO_TS.BUP.

Here are the headers that are generic to all IFOs:

And here is some data that is specific to the VMG IFO: