MobileRead Forums - View Single Post - k2pdfopt: optimizes PDFs for viewing on e-readers

japinder · 09-24-2014, 10:37 AM

Yikes doesn't even remotely express my take when, on my new M96, this was the first PDF I tried & imagine my frustration when it took ages to render each page & even then rendering it horribly. I thought I had purchased the biggest mistake of my life.

It was only later, when I tried some 'normal' PDFs, that I was able to appreciate my latest acquisition.

Thanks a ton for your advice Will & Mark. I was just stumbling along in the 'k2pdfopt' dark, till you shone some light to show me the way...

Update:
Now I'm using the combined option:
-rt 0 -cbox .95,.95,6.63,9.1 -mode crop -c- -n- -idpi 400 -cmax 4

And the results are perfectly usable. Using the cmax option also brings down the size of the generated grayscale PDF from 12.5 to 10.5 MB (from the original 4.2 MB).

A new problem, I don't know whether I like '-cmax 3' or '-cmax 4' more. The black text really pops on an almost white background with 4, but the diagrams look washed out. 3 gives somewhat more realistic diagrams, but I miss that pop. Looks like I have a problem of plenty.

09-24-2014, 10:37 AM	#908
japinder jp Posts: 139 Karma: 12834 Join Date: Aug 2014 Location: Singapore Device: Onyx Boox Note Air, Remarkable 1, Kindle Oasis 2	Yikes doesn't even remotely express my take when, on my new M96, this was the first PDF I tried & imagine my frustration when it took ages to render each page & even then rendering it horribly. I thought I had purchased the biggest mistake of my life. It was only later, when I tried some 'normal' PDFs, that I was able to appreciate my latest acquisition. Thanks a ton for your advice Will & Mark. I was just stumbling along in the 'k2pdfopt' dark, till you shone some light to show me the way... Update: Now I'm using the combined option: -rt 0 -cbox .95,.95,6.63,9.1 -mode crop -c- -n- -idpi 400 -cmax 4 And the results are perfectly usable. Using the cmax option also brings down the size of the generated grayscale PDF from 12.5 to 10.5 MB (from the original 4.2 MB). A new problem, I don't know whether I like '-cmax 3' or '-cmax 4' more. The black text really pops on an almost white background with 4, but the diagrams look washed out. 3 gives somewhat more realistic diagrams, but I miss that pop. Looks like I have a problem of plenty. Last edited by japinder; 09-24-2014 at 11:47 AM.