Cover art on Sony BD player?

Hi. I have a Sony BDP-S570, and despite adding artwork to my video files in Mezzmo, I can't seem to get the artwork to appear when browsing the files on the BD player.

The files are encoded as M4V, and Mezzmo remuxes them when I play them (file type in BDP is shown as M2TS).

Does anyone know if the Sony supports displaying artwork?

I have the same lack of artwork with MP3s too

Ah, apologies, appears to be a limitation of the player....sorry for even thinking that it might be Mezzmo's fault!