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Add a line starting with - before the input file URL.

https://example.org/1.jpg

- image-filter = "FILTER_EXPR_HERE"
https://example.org/2.jpg

https://example.org/3.jpg

For details:

"""Process an input file.
Lines starting with '#' and empty lines will be ignored.
Lines starting with '-' will be interpreted as a key-value pair
separated by an '='. where
'key' is a dot-separated option name and
'value' is a JSON-parsable string.
These configuration options will be applied
while processing the next URL only.
Lines starting with '-G' are the same as above, except…

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2 replies
@freely2597
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@mikf
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mikf Nov 11, 2025
Maintainer

Answer selected by freely2597
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