Colorchange during jpg->webp conversion

Przemysław Sobala <[email protected]>
Newsgroups gmane.comp.video.graphicsmagick.help
Message-ID <[email protected]>
Hi
I'm using GraphicsMagick 1.3.25 and libwebp 0.5.2 and I've noticed color 
change when converting images from JPG to WEBP, eg.:

gm convert http://d.wpimg.pl/1972545173--1156527689/paulina-sykut.jpg 
gm.webp

Please compare skin color in source jpg and target webp 
(http://pasteboard.co/50Q0V8llI.png).
FFmpeg that uses the same libwebp doesn't make such noticeable color change.

Please comment.
--
Best regards
Przemysław Sobala

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