a new display slicer product
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Alec Sparks
Sep 4, 2025, 11:32:26 AM (yesterday) Sep 4
to QLab
Hello everyone!
I've developed a somewhat opinionated display slicer product designed for use on Mac (and specifically for QLab). It assumes you want a very dumb box to do the slicing and will use mapping software like QLab to handle bezels/warping/etc.
You can check it out here!
Slice4 connects to your Mac as a 3840x2400 display with a unique EDID that will not confuse your Mac or QLab. It does not attempt to negotiate resolution with the attached projectors, it simply spits out 4 outputs which are all permanently locked to WUXGA 1920x1200. Pretty much any display or projector 1080p or above will happily accept that signal.
Slice4 connects to your Mac as a 3840x2400 display with a unique EDID that will not confuse your Mac or QLab. It does not attempt to negotiate resolution with the attached projectors, it simply spits out 4 outputs which are all permanently locked to WUXGA 1920x1200. Pretty much any display or projector 1080p or above will happily accept that signal.
I decided to make it because of the following observations:
- Apple Silicon is very capable of driving more projectors than the number of displays the Mac officially supports.
- There are cheap display slicers available that are tempting but they have very low quality output.
- The QuadHead2Go cannot be configured at all from a Mac, and it isn't easy on Windows either.
- Most projectors are WUXGA 1920x1200. No video wall controllers support that out of the box, so you often wind up scaling or cropping.
- Blackmagic outputs are fantastic, but they're restricted to broadcast resolutions, so you often wind up scaling or cropping.
- HDBaseT input is available on most projectors, uses cheap ethernet cables, supports WUXGA, and provides useful diagnostic indicators on the transmitter end. I prefer it over SDI.
Fatima Black
Sep 4, 2025, 1:31:20 PM (yesterday) Sep 4
to ql...@googlegroups.com
Great Job! I'll have to check this out.
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