Request - MetaData

[ItJustFox]

Is your feature request related to a problem? Please describe.
Yes, I have a lot of image with MetaData, and for no reason I cant see it on png image. But the metadata are here because I can see it on analyser. (Ps I use ExifTool)

Describe the solution you'd like
A way to see the metadata on png like for jpg

[Railline]

i'm interresed by this fonctionnality too !

[bpatrik]

Once I update the metadaloader to a newer version #277 I hope png will be supported too.

[grasdk]

@ItJustFox , @Railline try with the lastest code (you need to build from source) or wait for the next release. There is better support for PNG metadata now.

[Railline]

@ItJustFox , @Railline try with the lastest code (you need to build from source) or wait for the next release. There is better support for PNG metadata now.

Perfect that ^^ i will wait for the next release i can't build it, i didn't know how to do xD

[bpatrik]

The edge should already contain it. It builds within 45 mins after merging the PRs.

…

-- Sorry for being brief, sent from my phone.

On Wed, 20 Mar 2024, 19:07 Railloune, ***@***.***> wrote: @ItJustFox <https://github.com/ItJustFox> , @Railline <https://github.com/Railline> try with the lastest code (you need to build from source) or wait for the next release. There is better support for PNG metadata now. Perfect that ^^ i will wait for the next release i can't build it, i didn't know how to do xD — Reply to this email directly, view it on GitHub <#471 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABZKA5RB2HRAQ2OJHC3GOPLYZHF7DAVCNFSM5TDGJV62U5DIOJSWCZC7NNSXTN2JONZXKZKDN5WW2ZLOOQ5TEMBRGAZDQNBUGY4Q> . You are receiving this because you commented.Message ID: ***@***.***>

[grasdk]

@Railline ah yes, forgot the edge builds. For example if you're using docker there are edge builds:
https://hub.docker.com/r/bpatrik/pigallery2/tags/

Maybe you followed these instructions earlier?
https://github.com/bpatrik/pigallery2/blob/master/docker/README.md
then all you have to do is to replace "latest" with "edge" in your docker config / command

[Railline]

Nice i will try it ^^
i just pull the new build i wait the end of the scan, it will be very long xD

[Railline]

i'm on edge version and keyword on png aren't there, i have reset gallery and launch a new scan but nothing appen

[grasdk]

i'm on edge version and keyword on png aren't there, i have reset gallery and launch a new scan but nothing appen

@Railline Sorry for the long wait. Can you upload a png with a keyword for me to test on?

[Railline]

i'm on edge version and keyword on png aren't there, i have reset gallery and launch a new scan but nothing appen

@Railline Sorry for the long wait. Can you upload a png with a keyword for me to test on?

No problem u have a life too xD

for the image

[grasdk]

Hey @Railline

Thanks for the upload. I took the image for a test and you are right. However, it's not an easy fix.
The keywords-tag is apparently non-standard, if one is to believe the exiftool output, when writing the value:

This is me adding the keyword test to test_png.png

$ exiftool -keywords=test test_png.png 
Warning: [minor] Creating non-standard IPTC in PNG - test_png.png
    1 image files updated

So it works. Is supported by exiftool, but not standard. And also no supported by the framework exifr used here in pigallery2.

So what you could do is copy the keywords to the Xmp-dc:Subject tag instead, as suggested here in the section of the same name: https://exiftool.org/gui/articles/where_what.html

With exiftool, you could run a command like this on *.png maybe using the -r parameter, to copy the keywords to subject. Here is an example of the command with a before and after extract:

$ exiftool -keywords -subject test_png.png 
Keywords                        : test2
Subject                         : test

$ exiftool '-XMP-dc:Subject+<IPTC:Keywords' test_png.png
    1 image files updated

$ exiftool -keywords -subject test_png.png 
Keywords                        : test2
Subject                         : test, test2

First Keywords has value "test2" and Subject has value "test".
Then the command to add keywords to subject
Finally Keywords has value "test2" and Subject has value "test", "test2".

Subject is supported by exifr and by pigallery.

Not what you were looking for, but maybe a bit of help anyway :)

[Railline]

Hey @Railline

Thanks for the upload. I took the image for a test and you are right. However, it's not an easy fix. The keywords-tag is apparently non-standard, if one is to believe the exiftool output, when writing the value:

This is me adding the keyword test to test_png.png

$ exiftool -keywords=test test_png.png 
Warning: [minor] Creating non-standard IPTC in PNG - test_png.png
    1 image files updated

So it works. Is supported by exiftool, but not standard. And also no supported by the framework exifr used here in pigallery2.

So what you could do is copy the keywords to the Xmp-dc:Subject tag instead, as suggested here in the section of the same name: https://exiftool.org/gui/articles/where_what.html

With exiftool, you could run a command like this on *.png maybe using the -r parameter, to copy the keywords to subject. Here is an example of the command with a before and after extract:

$ exiftool -keywords -subject test_png.png 
Keywords                        : test2
Subject                         : test

$ exiftool '-XMP-dc:Subject+<IPTC:Keywords' test_png.png
    1 image files updated

$ exiftool -keywords -subject test_png.png 
Keywords                        : test2
Subject                         : test, test2

First Keywords has value "test2" and Subject has value "test". Then the command to add keywords to subject Finally Keywords has value "test2" and Subject has value "test", "test2".

Subject is supported by exifr and by pigallery.

Not what you were looking for, but maybe a bit of help anyway :)

i have make a little script for looking all png on my file and put tag directly on the db that work correctly xD