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Without using timthumb, does anyone know of a way to set jpeg_quality for certain post-types or posts?

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You can hook into the jpeg_quality filter and do a check for the post type you want to apply the filter to.

add_filter( 'jpeg_quality', 'my_jpeq_quality' );
function my_jpeg_quality( $quality ) { 
if ((isset($_GET['post_type']) && $_GET['post_type'] == 'your_post_type') || (isset($post_type) && $post_type == 'your_post_type')) :

return 100;  //Set quality here

endif;

 }
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hmmm... this code works, however all images that aren't 'your_post_type' are now being generated with extremely low quality. (a 444k image is now 4k!) I tried adding an "else return 90" but this seems to get ignored... ` add_filter( 'jpeg_quality', 'my_jpeq_quality' ); function my_jpeg_quality( $quality ) { if ((isset($_GET['post_type']) && $_GET['post_type'] == 'work') || (isset($post_type) && $post_type == 'work')) { return 100; //Set quality }else return 90; } –  Lane Feb 14 '12 at 5:28
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