[solved] How to change thumbnails compression factor?

[Sulpher]

Hello everybody!

I noticed, that Virtuemart generate thumbnails with a 100% compression of .jpeg files which makes thumbnails really big and heavy. For example: 170x170 thumbnail has approximately ~20kb size, but if we with help of Photoshop save this image with 60% jpeg compression, we can get 5kb thumnail in output! So it seems Virtuemart generate thumnails with 100% jpeg compression by default and I'd like to change this parameter manually, since I'm sure - this is very important and it'll be really useful trick for everyone!

Just a little calculation:
20 pics x 20kb per a page = 400kb size.
20 pics x 5kb per a page  = 100kb size.

As you can see, this is very interesting result.

So, I wish I had to adjust this parameter within code manually, so I need expert's advice where to do it.

Cheerz,
Eugene.

[Sulpher]

Here is the solution:
file class.img2thumb.php
function: NewImgSave()
Line 323 from file beginning:

Code: [Select]

return imagejpeg($new_img, $fileout, 100);
This last parameter 100 is means thumbnail creation without compression. Try to replace it on 60 and thumbnails will get 60% jpeg compression.

[felixp]

Thank you for following up and posting the solution.