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-rw-r--r--admin/include/image.class.php2
1 files changed, 2 insertions, 0 deletions
diff --git a/admin/include/image.class.php b/admin/include/image.class.php
index 53516f62d..8ab6d9384 100644
--- a/admin/include/image.class.php
+++ b/admin/include/image.class.php
@@ -601,6 +601,8 @@ class image_ext_imagick implements imageInterface
function write($destination_filepath)
{
$this->add_command('interlace', 'line'); // progressive rendering
+ // use 4:2:2 chroma subsampling (reduce file size by 20-30% with "almost" no human perception)
+ $this->add_command('sampling-factor', '4:2:2' );
$exec = $this->imagickdir.'convert';
$exec .= ' "'.realpath($this->source_filepath).'"';