I updated to 17.9.1 drivers & software.
This solved two of my relive problems. First being overlay not working, the second being relive would create 0kb files.
Now it records, but relive is not capturing colour correctly. Its hard to describe, so here is a link of examples from the relive capture.
In the radeon setting, desktop is set to 4:4:4 RGB (Full Range) with 12-bit Color Depth
Thoughts on this one?