Re: Loosing metatags from png to jpg

Am Mo, 20 Sep 2010 11:25:13 CEST schrieb John Culleton:

> On Sunday 19 September 2010 12:08:44 Al Bogner wrote:
> > Version: ImageMagick 6.6.1-0 2010-06-22 Q16
> > http://www.imagemagick.org Copyright: Copyright (C) 1999-2010
> > ImageMagick Studio LLC
> > Features: OpenMP
> >
> > I wondered, that I loose most of the metatags, when I convert from
> > png to jpg. Is this a problem with my version from Opensuse 11.2?

> Just curious, what advantage do you see in jpg over png? Most
> browsers will handle png fine.

PNG is lossless and is better if you have to do conversions later, eg.
downsizing to different sizes.

I am sure I didn't loose metatags years ago with IM and png. Jpg to jpg
doesn't loose metadata.

I managed the loss of the metadata with exiftool -tagsfromfile, but I
hope this will be corrected with IM. Simply copying _all_ tags with
exiftool is not perfect, because the dimensions of the orignal image
are copied too.

Al