#1 2013-03-29 11:59:28


Metadata in png-files

Hello everyone,

I have successfully installed piwigo, and first of all, thank you very much for this great piece of software!
After some tinkering I manged to get Exif and Iptc metadata to show up with the pictures.
My problem however is the following:
The Metadata is only shown for jpeg-files.

I have used a raw file, and exported it to jpeg as well as to png and stores the Metadata in them. DigiKam tells me that the Exif- and the Iptc-Metadata is exactly the same in both pictures.

However, when i upload them to my site, the Metadata is only shown for the jpeg version of the picture.

My looks like this:


date_default_timezone_set('Europe/Berlin'); // change it with your Timezone

$conf['file_ext'] = array('jpg','JPG','jpeg','JPEG',

// picture_ext : file extensions for picture file, must be a subset of
// file_ext
$conf['picture_ext'] = array('jpg','JPG','jpeg','JPEG',

$conf['show_iptc'] = true;
$conf['use_iptc'] = true;
$conf['use_iptc_mapping'] = array(
  'keywords'        => '2#025',

$conf['show_exif'] = true;
$conf['use_exif'] = true;
$conf['show_exif_fields'] = array(
$conf['use_exif_mapping'] = array(
  'date_creation' => 'DateTimeOriginal',


Right now, I have no idea what I am missing, any help is greatly appreciated.

Thank you very much in advance, and Happy Easter everyone


#2 2016-09-27 11:46:10


Re: Metadata in png-files

Happy Easter you too :-)

Is this situation the state of the art in 2016, too, or now is it possible to use 'exif' tags written in png files?


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