The troubles of lacking a cost-effective DVE device for source scaling and picture in picture. (cc +Alex Lindsay
So our current setup has us trying to scour for a software based DVE that can process native interlaced (1080i) and output back a Blackmagic card. Turns out, there are none that are available that do what we want cause they're hardware based (AND RARE for our budget range) or they lack native interlaced processing, OR if you do it via the graphics card, no control of vertical sync to eliminate screen tearing...
Our problem lies in that we currently have the lowest end model of the Blackmagic Production Studio 4K that lacks 2D DVE hardware inside, so the most cost efficient way is to do it through software, but passing it through Wirecast will remove the native interlaced processing and differentiate the motion.
The closest one that is under continued development is OBS studio. It has options to work in drop-frame formats and I already pitched to the developer our workaround for native interlaced workflow, being you de-interlace with Yadif2x on Blackmagic input, process in 1080p59.94 (60p) and then send back to another Blackmagic card as 1080i. The Blackmagic does the Vsync for you, or if you want to use the GPU in projector mode, there should be a "Alternate Vsync" option like in Media Player Classic - Home Cinema to get the Vsync to a proper spot.
This is for an upcoming convention which is happening in 2 weeks. I will have a very hard time to convince my team a hardware swap should be done and right now all solutions I've seen are all so close, yet so far. We may be unable to do DVE effects at all.
What's so easy in Xsplit and OBS to go to a stream is not so easy to do with SDI hardware in a cost efficient way. THERE HAS TO BE A SOLUTION that doesn't sacrifice native interlaced processing.