Search found 4 matches

by jmann
Mon Jul 11, 2016 9:15 pm
Forum: NConvert
Topic: Convert JPEG from 72 dpi to 300 dpi
Replies: 12
Views: 6189

Re: Convert JPEG from 72 dpi to 300 dpi

Okay I tried using this command ... -out jpeg -dpi 300 -subsampling 2 -q 96 -overwrite -no_auto_ext This gets me to just about the original file size. For the quality setting though ... what is the real difference from -q 85 as default at 2 MB to -q 96 at 6 MB. If related to an option in Photoshop w...
by jmann
Mon Jul 11, 2016 5:50 pm
Forum: NConvert
Topic: Convert JPEG from 72 dpi to 300 dpi
Replies: 12
Views: 6189

Re: Convert JPEG from 72 dpi to 300 dpi

I'm not sure what the q-factor is. Quality of the images are 100% from the camera and sub-sampling should be 2. I've adjusted the command line to: -out jpeg -dpi 300 -subsampling 2 -overwrite -no_auto_ext Now my test file instead of 1.84 MB is 2.28 MB which is closer to the 6.09 MB of the original f...
by jmann
Fri Jul 08, 2016 2:16 pm
Forum: NConvert
Topic: Convert JPEG from 72 dpi to 300 dpi
Replies: 12
Views: 6189

Re: Convert JPEG from 72 dpi to 300 dpi

In the Windows GUI when resizing an image there are multiple options but specifically one to change the DPI and a checkbox for Resample with a select box for types (ex. Lanczos). I want to be able to do this with nConvert command line. Currently I can successfully change the DPI to 300 using: -out j...
by jmann
Thu Jul 07, 2016 5:06 pm
Forum: NConvert
Topic: Convert JPEG from 72 dpi to 300 dpi
Replies: 12
Views: 6189

Convert JPEG from 72 dpi to 300 dpi

I've used ... -out jpeg -dpi 300 -keepdocsize -keepfiledate -overwrite -no_auto_ext ... to update my test image with success, kind of. I don't see an command to use with -keepdocsize that would keep the original size. When I convert my image from 6000x4000 72dpi it becomes 25000x16667 300dpi. What a...