As Ofnuts, how many pages ? If you get ImageMagick (IM) from https://imagemagick.org/script/download.php you can get a bang up-to-date portable (appimage) version 7.1 This in a kubuntu 20.04 / Gimp 2.10.28
I found a pdf roughly the same size in kb and trying to open in Gimp with 6000 ppi get exactly the same error message. (and for smaller values as well)
Using IM top to bottom
The pdf
Find the pdf properties (IM identify)
Try a conversion to jpg @ 6000 ppi which crashes
Try a conversion to jpg @ 3000 ppi and get a result - 2 pages as jpegs.
For this particular pdf, that is a big file both in pixel size and size opened in Gimp. Remember 3000 ppi is a quarter the size (in pixels) of a 6000 ppi image.
You might get something out that way. The IM command is
I found a pdf roughly the same size in kb and trying to open in Gimp with 6000 ppi get exactly the same error message. (and for smaller values as well)
Using IM top to bottom
The pdf
Find the pdf properties (IM identify)
Try a conversion to jpg @ 6000 ppi which crashes
Try a conversion to jpg @ 3000 ppi and get a result - 2 pages as jpegs.
For this particular pdf, that is a big file both in pixel size and size opened in Gimp. Remember 3000 ppi is a quarter the size (in pixels) of a 6000 ppi image.
You might get something out that way. The IM command is
Code:
./magick -density xxxppi in.pdf -quality (value) out.jpg