Quickest way to reduce ~400 images to .05% of original size
I have around 400 images that are taken from a 8 megapixel camera. I want to reduce the image size to around 4k pixels. What is the fastest way to do this, I have access to both windows and linux systems.
Really only 4k pixels? Anyway, using GraphicsMagick you can run:
gm mogrify -output-directory 4k -resize 52x78 *.jpg
Or, if you prefer, ImageMagick has pretty much the same syntax.
Irfanview. Does it all and it's free.
On Windows I've always used nconvert:
nconvert -thumb 78 78 -o $\thumb\% *.jpg
XnView (on the same page) can do the same.