Do we support recording veto signals? How?

[rerpha]

[Tom-Willemsen]

Not just recording them, but we may still need the concept of e.g. good & raw frames, so that people can still do g.waitfor_frames(1000) and get 1000 good frames (or equivalent for good uAh etc).

Or if we don't support that, then how to support a roughly equivalent workflow.