Raspberry Pi Forums

Hi learned peeps!

Is it possible to use both HDMI outputs and the composite at the same time?

HDMI1 and Composite will be mirrored at 576i and HDMI0 will be separate at 1080p.

I'm building a retro-box and want to be able to use several output methods without too much in the way of tinkering to make it happen.

Acheronus wrote: ↑

Sat Feb 29, 2020 10:37 am

Is it possible to use both HDMI outputs and the composite at the same time?

No, if you activate composite you loose 1 HDMI output.

Memory says enabling composite disables BOTH HDMI as it enforces a very specific clocking structure that compromises performance elsewhere. That is why it isn't enabled by default, and you have to provide enable_tvout=1 in config.txt.

So will have to use an HDMI to scart AND a scart splitter AND a scart to composite.... That's a lot of little annoying boxes in my build.....

Actually, looking at it again, can be done with 1 box and some creative cabling...