a new display slicer product

[Alec Sparks]

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. 

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. 
  

I made it for QLab users like myself so I hope it is appropriate to share in this group. Feel free to ask questions!

[Fatima Black]

Great Job! I'll have to check this out. 

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Fatima Imani Smith 

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[Jake Perrine]

Hello, I bought one of these, and it did not come with instructions.  I get the general idea of it, and I've made it work, but I feel like I'm not integrating it with Qlab to the best possible use.  I want four quadrants of 1080p video to the four outputs, but I currently have to crop and adjust the placement of everything video cue.  I'm not setting the Video Output / Stage tabs correctly.  Any advice?

[Alec Sparks]

Hiya!

Docs are available at https://www.stageblocks.co/slice4-user-guide. You're right that we provide no docs for the best way to configure QLab to use it, and QLab's docs are a bit light in this area too.

We'll update our docs with more specific QLab instructions. In the meantime, you'll want to set up your Output Routes like the attached image! That way you can treat each quadrant as totally separate output routes in QLab.