https://bugzilla.wikimedia.org/show_bug.cgi?id=31944
Derk-Jan Hartman <hart...@videolan.org> changed:
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CC| |hart...@videolan.org
--- Comment #1 from Derk-Jan Hartman <hart...@videolan.org> 2011-10-25 19:02:12
UTC ---
PNG does not support Exif. exiftool will try to convert as much as possible to
PNG text comments or to XMP, but most of the information is lost.
As exiftool explains: http://www.sno.phy.queensu.ca/~phil/exiftool/
A special ExifTool option allows copying tags from one file to another. The
command-line syntax for doing this is "-tagsFromFile SRCFILE". Any tags
specified after this option on the command line are extracted from source file
and written to the destination file. If no tags are specified, then all
writable tags are copied. This option is very simple, yet very powerful.
Depending on the formats of the source and destination files, some of tags read
may not be valid in the destination file, in which case they aren't written.
It might be that exiftool is writing the whole exif block into some PNG part,
but then that is not standard, and might not be recognizable by our software.
bawolff might now. I'll see if he can take a look.
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