Consider using Google's Guetzli Encoder when posting images. ;-)

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 From:  futagoza (STEFAN)
8363.1 
Hi all,

because we all like to post our images in high-quality, i assume, i came a while ago
Google's new Guetzli jpeg Encoder, which helps us all to save a lot of bytes, without
loosing to much, if any, visual quality of an image.

Here's a short test of mine:

bw_final.png = 878.279 Byte (OS X preview)


bw_final2.png = 647.629 Byte (run through pngcrush)


bw_final3.jpg = 188.445 Byte (pngcrushed image run through Guetzli)


Article:
http://www.theverge.com/2017/3/17/14957272/google-jpeg-encoder-new-guetzli-smaller-faster

Source Code:
https://github.com/google/guetzli

Note: Guetzli consumes lot's of memory and takes also time to encode an image, but the results
are imho worthwhile.

Regards
Stefan

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 From:  futagoza (STEFAN)
8363.2 In reply to 8363.1 
...and for squeezing other attachments like .zip we could also consider Google's
Brotli or Zopfli file compressors. ;-)

Regards
Stefan
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 From:  Frenchy Pilou (PILOU)
8363.3 
Something i don't undersand
I load your first image and save as JPG old fashion (90 %)
I obtain an image 75.000 KB against your 188.445
1 first April ?

EDITED: 31 Mar by PILOU

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 From:  futagoza (STEFAN)
8363.4 
Hi Pilou,

i was talking about "high-quality"... So please try again with 100% instead of 90%.

When i use 100%, depending on the software i use, i get between 300+K and 500+K.

Regards
Stefan
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 From:  Frenchy Pilou (PILOU)
8363.5 In reply to 8363.4 
for your image at 100% : 292.167 ;)
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 From:  futagoza (STEFAN)
8363.6 
Cool, that sounds good.

O.k. another test with Google's Zopfli, in case people
don't like jpeg...

Same image with Photoshop as .png = 736.661 Byte
then pngcrush = 660.358 Byte
and pngcrushed image used with Zopfli = 631.517 Byte

Source Code: https://github.com/google/zopfli

Regards
Stefan
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 From:  futagoza (STEFAN)
8363.7 
Hi Pilou,

i wonder if you or anybody else can open also
my attachment without any problems. I used also
Google's Zopfli to compress the file instead
of .zip. Maybe i use it too in the future for
attachments if everybody can open it.

Zip file = 909.779 Byte
Zopfli = 895.999 Byte

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 From:  futagoza (STEFAN)
8363.8 
O.k. Pilou, i checked the --help entry and Guetzli defaults to 95%...

With 100% it would be 476.217 Byte
and with 90%, like you did, it would be 84.770 Byte.

I'm curious now what you would have with 95%?

You must have a very good encoder for Windows! :-)

P.S. just found ImageOptim for Mac, wich contains
Zopfli too. https://imageoptim.com/mac

Regards
Stefan
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 From:  Frenchy Pilou (PILOU)
8363.9 In reply to 8363.8 
With my old one i have 122.016 at 95 %

If you speak about BatWing attachment no problem to uncompress with 7Zip! :)

EDITED: 1 Apr by PILOU

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 From:  futagoza (STEFAN)
8363.10 
Thanks for the info Pilou, much appreciated!

Regards
Stefan
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