thanks for confirming the test details — and for the well-thought-out proposal.
I agree with the direction on proxy dual-recording, and it’s now under evaluation. Beyond the three benefits you listed, our internal discussion surfaced one more reason it matters even more for Spark than for a conventional cinema camera:
The ideal rhythm for high-speed work is to keep shooting until you’ve got the moment (or filled the card) before offloading — mid-day offloads are slow and introduce DIT variables, as earlier replies in this thread pointed out. Supporting that rhythm requires instant, scrubbable review on set without pulling the card. RAW is too heavy for smooth in-camera scrubbing, but with a proxy, the playback engine only has to decode a lightweight H.265 — instant scrubbing, out to a big monitor via SDI with UI overlay, or streamed to a phone/iPad over Wi-Fi. And the same proxy files cut the wait at offload time.
On native PXBC support in NLEs: we’re in contact with Blackmagic and Adobe, and we’ll share updates as they come.
We’re currently confirming hardware feasibility for dual-recording with our engineering team — no version commitments yet, but this request is firmly on the table.