TIFF - comments lost after image resize

[luku]

Hi, I noticed that after resizing TIFF via imagemagick I can no longer extract some metadata.

sample.tif is the original file. It contains some metadata and your library extracted comments/imagedescription, comments/software and comments_html/imagedescription, comments_html/software.

sample-resized.tif is the resized file. It was created with imagemagick (ImageMagick 6.8.9-9 Q16 x86_64) cmd: convert sample.tif -resize 1900x1900> sample-resized.tif
It's not possible to extract the same metadata, but I can see in Adobe Bridge that the metadata are still there. Any idea what is the problem or difference between those 2 files or why it's not extracting the comments any more?

[JamesHeinrich]

Both files contain some <x:xmpmeta> XML metadata, presumably from Adobe Bridge. This data is not currently parsed by getID3.
The original file also contains a TIFF comment, but the resized file does not. I'm not sure if there is an ImageMagick option to copy/preserve TIFF comments.

I'll take a look when I have a moment to see how easy it would be to extract the Adobe metadata.

[luku]

Thanks for quick reply! I couldn't find any argument for preserving comments, but I found one post about similar issue, when converting tiff to jpg. I can also confirm, there're warnings from IM: Incompatible type for "RichTIFFIPTC"; tag ignored. 'TIFFFetchNormalTag' @ warning/tiff.c/TIFFWarnings/881.
So it's probably that those tags are not recognized by IM and stripped, nothing strange in getID3.

But it would be great feature, if it's possible to implement Adobe metadata extraction!

[JamesHeinrich]

I have improved TIFF parsing in 1e6b2ef

The XMP data, if available, is returned in [TIFF][XMP] but not parsed further; I leave that to the user if it's useful to them.

I also made a number of other small bugfixes in the TIFF module while I was there (unknown compression types, unhandled tag types, etc).