Re: making thumbnails

[Gene Heskett <gheskett@wdtv.com>]

On Thursday 30 April 2015 03:28:13 Alex Mestiashvili wrote:
> 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/.

I use jigl for that.  Where you see a sceen full of thumbnails on my web 
page, clicking on any thumbnail brings it to about 3/4 screen size, a 
further click on that will give the viewer that original raw image that 
you can pan & tilt around in to see details.

Cheers, Gene Heskett
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