I suspect this is an easy answer but i’ve been crawling the net for some time and haven’t managed to find anything clear.
I’ve got 8 Projectors hooked up via SDI from a Blackmagic Decklink Quad2, everything running through Touchdesigner. The Projectors are mapped to seamlessly cover a large sculpture that’s then populated with various video. The system is running plenty of other features but performance remains solid and consistent (frame time <16ms).
However, after a few hours of run time, the projections appear to be out of sync. For example, a video of a vertical line becomes “unmapped” when it is run up the projection raster. The video is not lagging, it is just playing a few frames behind at various moments.
The input video is a single 4k Frame cropped to the different sources via touch.
Restarting the server fixes the problem until the drift sets back in a few hours later.
My question is: would a Sync Generator (Mini Converters – Tech Specs | Blackmagic Design)
Hooked up to the Decklink’s Reference port potentially lock the sync?
(This also assumes the problem is the Decklink)
Quadro RTX 5000,
128gb of RAM,
Some Flavor of Intel (iSeries) Processor clocked at 4.5Ghz.
Touch version: 2021.14360
I would attach .TOX but I am unfortunately under NDA until Mid September.