just remember you can’t just make up quality / resolution that isn’t there.
converters will do the best they can but there is always a tradeoff somewhere.
I wasn’t super familiar with the V8 I looked it up
Is this the mixer you are talking about?
so I assume you are taking the Svid out > HDMI as your main out and then bringing in a HDMI source > svid > one of the svid inputs.
your better quality option will be using the PC inputs if they work with component and getting a HDMI > component box there are lots of options some laid out at the link below
this is a wiki I put together like 3 years ago or so and while it hasn’t been updated in a little while still has lots of good info.
at the same time there will always be “better” options…So don’t let that stop you from creating!