When using the
f_auto parameter, the actual format to be fetched is determined on the CDN level. Therefore the
f_auto component must remain visible to the CDN and cannot be used within a named-transformation. More about the automatic format feature can be found here.
The automatic quality transformation parameter (
q_auto) is effective in named transformations, except in one situation.
q_auto is used in a delivery URL and the browser sets the
Save-Data HTTP header to
on in the request,
q_auto is translated to
q_auto:eco at the CDN level. If this parameter is hidden in a named transformation then it is not visible to the CDN, so the default level is applied,
To accommodate this situation, you may prefer to use
q_auto together with a named transformation by chaining the components, for example,