Ah, ok, You have a formuler 1. For which there are only experimental drivers that enable transcoding, which are not published by the manufacturer in the BSP. So as far as OpenPLi is concerned, the box doesn't support transcoding.
We can check again with the manufacturer what the status is. If it will be enabled, it requires autoinstall of the plugin, and code changes to the streamproxy (hardwar detection) and the webif.