I did following in the opened large dialog window: Then I enabled Use advanced options (for bulk resize.) and clicked on button Advanced.
I clicked first inside IrfanView in menu File on menu item Batch Conversion/Rename. However, it is also possible to proportional resize images to 1840 x 1840 pixels with canvas the resized image for example with white border on top/bottom or left/right depending on width and height of original image using advanced batch conversion mode. If the images are needed for a web gallery in 1840 x 1840 pixels, reference each image from within a DIV or TD element with a width and height of 1840 pixels and define that the image is displayed centered horizontally and vertically within the element. I do not recommend to resize each image with a too low height or width to 1840 x 1840 pixels to get only square images with "blank" area on top and bottom side on an image with a too low height or "blank" area on left and right side on a too small width. "C:\IrfanView\i_view32.exe" "C:\photo\C0692B\*.jpg" /resize_long=1840 /aspectratio /resample /convert="C:\photo\C0692B\test\*.jpg"Īn image with 1920 x 1200 pixels has an aspect ratio of 1920 / 1200 = 1.6 and therefore the resized image has 1840 x 1150 pixels. There are the options /resize_long=x and /aspectratio for this purpose.
width is higher (or equal) than height.įor images in portrait format it is most likely better to resize the height to 1840 pixels with keeping the aspect ratio of each image. It looks like you want to resize each JPEG image in a folder to a width of 1840 pixels with keeping aspect ratio for images in landscape format, i.e. The text file i_options.txt in program files folder of IrfanView lists and explains all options supported by IrfanView on the command line.
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