[mythtv-users] How do you set up a MythTV frontend to output YCbCr via HDMI

[Paul Gardiner]

On 06/03/2013 20:10, phipps-hutton at sky.com wrote:
>
> Quoting Paul Gardiner <lists at glidos.net>:
>
>>
>> Do you know how this works? Is the screen buffer YCbCr, or is it
>> still RGB with the graphics chip turning it back to YCbCr just
>> to output to HDMI?
>
> I have no idea how it works but all of the mpeg decode is done in YCbCr
> space until you get to the presentation of decoded frames. I guess they
> can be decoded to RGB if you have an RGB framebuffer or left as YCbCr
> otherwise. Sooner or later something is going to convert that YCbCr to
> RGB unless you have a very strange display device.

Yes, but YCbCr output may mean that you end up with

YCbCr => RGB => YCbCr => RGB

> Does it look better?

Not sure. Any difference is very subtle. I need to let it
settle on me for a while. Good to be able to test it anyway,
and improved image wasn't the only aim: it'll be nice to
be able to swap between my blu-ray player and MythTV without
having to adjust the TVs input.

P.