As one of Vuo's developers, I work on Vuo's engine (the thing that makes compositions run), work on nodes, and write documentation. You'll see me on the forums answering people's questions about Vuo.
I enjoy using Vuo to make live music visuals. My hope for Vuo is that it will grow into a community of people of diverse backgrounds and identities making lots of different artistic, useful, unique, goofy, beautiful, crafty, wonderful compositions.
Estoy practicando para ser competente en español. Si publicas en el foro en español, trataré de responder en la misma manera.
It seems to be working as expected in our testing, but let me know if you see something different.
For both H.264 and H.265, between quality 0 and 1 there's a clear size difference. Between 0.5 and 1, there's not necessarily much difference.
Vuo translates the quality slider into a bitrate value it passes to AV Foundation. If the movie can be fully encoded using a certain bitrate, then increasing the slider beyond that shouldn't increase the quality or size.
If you used image filter/generator compositions in Vuo 1.x, then you might recall that you had to be really careful about using triggers, because there had to be a one-to-one correspondence between events entering and events exiting the composition. We changed that in Vuo 2.0 so that the burden is no longer on you to be cautious. The behavior you're seeing is related to that. It also prevents certain kinds of infinite feedback loops.