Can I save pixiv & *booru tags to the image file?

[waka-wa]

Not sure if this is possible with gallery-dl, been messing around and reviewing the documentation and can't seem to figure it out.

Basically, I want the tags to be saved to the image data so if I use something like XnView I can just search by a tag.

I found out how to save the tag data to a text file but that doesn't help much unfortunately. I know I could use something like exiftool to merge the text file to the image, but ideally gallery-dl will just handle this all by itself.

This is my current pixiv config:

"pixiv":
	{
		"archive": "H:/Pics/gallery-dl/archive-pixiv.sqlite3",
		"directory": ["Pixiv", "Artists", "{rating}", "{user[id]}"],
		"refresh-token": "xxx",
		"include": "artworks",
		"embeds": false,
		"metadata": true,
		"metadata-bookmark": false,
		"tags": "original",
		"ugoira": true,
		"skip": "abort:10",
		"filename": "{id}—{title}—{num}.{extension}",
		"postprocessors": [{
			"name": "ugoira",
			"ffmpeg-args": ["-c:v", "libvpx", "-crf", "4", "-b:v", "5000k"],
			"ffmpeg-twopass": true,
			"keep-files": false
		}]
	},

[mikf]

It is certainly possible, but you'll have to use external tools with an exec post processor.
There is no builtin functionality to add tags to downloaded files.

[waka-wa]

Ended up getting it working, just not within gallery-dl exclusively.

I have a .bat file to run gallery-dl, and after that's done it runs a powershell script to write the text file of tags to the XMP Subject and IPTC Keyword fields.

In case it helps anyone else, this is the powershell script I'm using:

#$directory = "H:\My\Directory\"

Get-ChildItem -Path $directory -Recurse -Filter "*.png.txt", "*.jpg.txt" | ForEach-Object {
    $txtFile = $_.FullName
    $imgFile = $txtFile -replace '\.txt$', ''

    $tagData = (Get-Content $txtFile) | ForEach-Object { 
        "-IPTC:Keywords=$_"
        "-XMP:Subject=$_"
    }

    & exiftool -overwrite_original $tagData $imgFile
}