Loosing metatags from png to jpg

[Al Bogner]

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?

Al

[John Culleton]

Post by Al Bogner
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?
Al
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Just curious, what advantage do you see in jpg over png? Most browsers
will handle png fine.

[Al Bogner]

Post by John Culleton

Post by Al Bogner
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