Blackmagic Key & Fill - SDI Playout
I'm using mimoLive solely for graphics insertion into a Blackmagic ATEM workflow.
- Blackmagic UltraStudio 4K
- Blackmagic ATEM Television Studio Pro 4K
When I activate the ATEM's Downstream Key 1, the multiview indicates the inputs on both SDI links from the UltraStudio 4K are active, and I see the key on the Program Out.
However, the key source from mimoLive is not 100% opacity -- the source video beneath the key, along with the key itself, are milky as if everything is overlaid with semi-transparent grey.
In the ATEM Software Control, I have Downstream Key 1 set to PreMultiplied as directed in mimoLive documentation. FillSource is set to UltraStudio SDI Output A, and Key Source is set to UltraStudio Output B. When I switch PreMultiplied off, the source video returns to normal, but the keyed graphic itself is still washed out as if overlaid with grey. mimoLive graphics remain milky and washed out whether DSK1 PreMultiplied is set on or off. Only the background source video seems to change by toggling the PreMultiplied Key.
I'm new to both mimoLive and Blackmagic. I don't know where to look for a solution: mimoLive, UltraStudio 4K, ATEM Television Studio Pro 4K, ATEM Software Control, or perhaps even physical cabling and signal routing through the Smart Videohub that is the patch point for all my SDI cables.