CI: Validation tool to identify JPG files saved in progressive format

[kai-li-wop]

To identify JPG files accidentality saved as progressive format it could be helpful to have a validation tool for this to test all used jpg files. Progressive JPGs are not supported by the q3map2 compiler and the engine.

[mgerhardy]

not sure if this would work:

exiftool -r -p "$filename" -if "$EncodingProcess =~ /Progressive/ or $Photoshopformat =~ /Progressive/" -ext jpg .

[kai-li-wop]

Can you implement it into the validation tool or is there something I can do?