Add filter for jpeg thumbnail quality

[ketsugi]

I would like to be able to specify how WordPress creates its thumbnail images. Some options I would like are:

• The minimum size above which thumbnails should be created
• The thumbnail image quality (for JPGs)
• The thumbnail size

This could be placed under Options > Writing.

[intoxination]

+1 on this idea from me. I would also like to see the option to turn off thumbail creation.

[mdawaffe]

[4751] makes some of this pluggable.

[Nazgul]

Maybe we should move wp_create_thumbnail to pluggable.php?

[pishmishy]

ketsugi. See wp_generate_attachment_metadata() in wp-admin/includes/image.php where wp_create_thumbnail() is used. It appears that the filters wp_thumbnail_creation_size_limit and wp_thumbnail_max_side_length do half of what you need. I'm attaching a patch that adds a filter for the quality.

[pishmishy]

Adds filter for thumbnail jpeg quality

[pishmishy]

Bumping milestone for feature freeze.

[pishmishy]

• Doesn't appear to be much demand for this feature
• No feedback from the reporter on the proposed fix

Closing as wontfix. Sorry.