CD-I IFF IMAG type

[Sembiance]

The CD-I discs of the 90s had IFF (standard EA IFF format) files on them.
One of the sub formats was the CD-I IMAG image format documented here: http://www.icdia.co.uk/authoring/IFF.docs.pdf

This always has a form type of IMAG and the first chunk will always be IHDR (not related to PNG IHDR).

Thus:
offset 0: "FORM"
offset 8: "IMAGIHDR"

Adding this definition to trid would be great.

Sample files here: https://telparia.com/fileFormatSamples/image/cdiIFFImage/

[Mark0]

Thanks for the info!