php 5.3 - Imagick setSamplingFactors in php -

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i using imagick in php create image property "chroma subsampling" 4:2:2 (2x1,1x1,1x1)

i use code:

$image = new imagick('test.jpg');  $factors = array("2,1,1");  $image->setsamplingfactors($factors);  $image->writeimage('test2.jpg');  $image->destroy();

but result is:

jpeg:sampling-factor: 2x2,1x1,1x1

to see image's properties; use:

$image = new imagick(test2.jpg'); $identify = $image->identifyimage(true); $data = $identify['rawoutput'];

i want set:

jpeg:sampling-factor: 2x1,1x1,1x1

thanks in advance , time

i found 1 solution using shell_exec,

<?php  $path = "e3.jpg"; $path2 = "e3.jpg"; $arr = array("-sampling-factor 4:2:2");  $properties = ""; foreach ($arr $property) {     $properties .= $property." "; }  $cmd = "convert ".$path." ".$properties." ".$path2;  shell_exec($cmd);  ?>

i hope find right solution using imagick methods.


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