[sciurius]

When a song page from a (possibly larger) PDF is cropped, this is registered in the database table Crop.
I was wondering what the exact interpretation of the values for Left/Top/Right/Bottom is.
I'd like to use these values for an external tool to apply the same crop to the pages.

[BRX]

That's interesting. Maybe these coordinates can be exported and used for another import by csv? Kind of saving the crop data without a full backup?

[Zubersoft]

They are the coordinates relative to the file page dimensions. So to use them, you will need to open the file and read the size of the page.

[sciurius]

This is what I thought, but the numbers just do not match.
For example, in one of my PDFs all pages have the same dimensions (mediabox 597.0 x 828.0). In the Crop table I see typical values of 596 and occasionally 598 (right) and 824 and 827 (bottom).

For page dimensions, do you use MediaBox, CropBox, BleedBox, TrimBox or ArtBox?

[sciurius]

That's interesting. Maybe these coordinates can be exported and used for another import by csv? Kind of saving the crop data without a full backup?

Exactly  

[Zubersoft]

I use the MediaBox for the page dimensions. i believe I am setting the right value of the crop rectangle to pageWidth - 1 and the bottom value to pageHeight - 1 if you drag the cropping boxes all the way to the edges of the page. If you clear the cropping, I set it to 0,0,0,0, so that's how you can identify when no crop has been applied. During some of my processing, if I calculate that cropping was applied, I set pageWidth = width of the cropping box + 1, and pageHeight = height of the cropping box + 1, and verify that I haven't exceeded the raw page dimensions (otherwise I clamp).