Hi f77,

I took some photos in JPEG rather than RAW and they display fine straight from the camera (using USB). I need to run a cable to the TV to test them through Mezzmo. I'll do that this evening and let you know what I find.
I just had a look on the Sony Australia site and they do mention that YCbCr 4:4:4 is not supported for the CX but it's not mentioned on the support page for my earlier Sonys so it looks like you may be correct.

Looks like some more testing to do.

Thanks for the suggestion.