Re: making thumbnails

[Alex Mestiashvili <alex@biotec.tu-dresden.de>]

On 04/28/2015 06:42 PM, Bob Proulx wrote:

Steve Greig wrote:

I have about 60 large jpg files in a directory. They are almost all over
2MB in size. I want to put them on the internet but wanted to make a
thumbnail version and a small version (about 75KB) of each one so the web
page does not take too long to load.

+1 Bob's answer. Also you can speedup the process by using xargs or parallel tool.
So if you have 4 cores on your machine you can do the job much faster:


  for k in *.jpg ; do echo $k ; done |xargs -I{} -P4 convert -quality 95 {} -geometry 1280 /tmp/{}

or

  find /adir_with_pngs -name "*.png" | parallel -P4 convert -quality 95 {} -geometry 1280 /tmp/{.}.jpg

The last one will also convert png to jpg and substitute the extensions on the fly.
The result files will end up in /tmp/.