Can I use -sampling-factor option with ImageMagick?

[rince]

Hi, thanks for a great module. Now, I use ngx_small_light.

I have a question.
Can I use -sampling-factor option with ImageMagick using ngx_small_light?
As far as I saw the source code, I could not use this option.
Do you have plans to make it available?

I wanna optimize the JPEG images on the following page.
https://developers.google.com/speed/docs/insights/OptimizeImages?hl=ja#header_1

[cubicdaiya]

I don't have plans to do it. But we will be able to implement a equivalent feature by MagickSetSamplingFactors().