Can you provide a brief how-to for developers (see examples)

[scoot-git]

Loving my new Pi5 digital pictureframe. I'd like to add some addtional features to the software. I'm a long time programmer and can more or less get around in Python.

1. I want to retrieve more of the tags/metadata on a picture. For example, on paintings I've populated Authors. For all I know, all metadata is retrieved and sitting there and I just need to get it into the proper structures. I'm looking for some guidance as to where I need to make changes to do this.

2. Return more values about the current picture via MQTT. Looking for the same, some guidance.

[helgeerbe]

Hi @scoot-git,

for playing around with metadata. Exiftool (https://exiftool.org) might be helpful. It's like a swiss knife for image metadata. But be aware, there is only a limited set on meta-infos which is used by alle camera manufactures.

1. In picframe you will find all meta data handling in get_image_meta.py
2. In configuration.ymlyou find the list of actual supported Keys. So you could extent get_image_meta.py and add the key in 'configuration.yml'. It should be exported by mqtt.

image_attr: [                           # image attributes send by MQTT, Keys are taken from exifread library, "PICFRAME GPS" is special to retrieve GPS lon/lat, "PICFRAME LOCATION" is special to retrieve geo reverse (load_geoloc hast to be True)
    "PICFRAME GPS",
    "PICFRAME LOCATION",
    "EXIF FNumber",
    "EXIF ExposureTime",
    "EXIF ISOSpeedRatings",
    "EXIF FocalLength",
    "EXIF DateTimeOriginal",
    "Image Model",
    "Image Make",
    "IPTC Caption/Abstract",
    "IPTC Object Name",
    "IPTC Keywords"]