Raspi3 Video Demultiplexer?

Question

I'm currently tinkering with 3D video using a Raspberry Pi 3 and I'll be using an interlaced composite video output.

However, I need to split the upper and lower fields between two CRT viewfinders (I know that the Raspi can't do that).

So, does anyone know of a circuit or module that can demultiplex interlaced video?

I'm choosing to do Field Sequential 3D, because the CRT viewfinders I'll be using are low resolution and a fixed frame rate.

Using the advantage of interlaced video, I can hopefully "double my frame rate" and achieve a flicker free experience.

shabaz · Answer

You could also consider streaming one channel to a second Raspberry Pi, so that you can use both composite video outputs. That might be more flexible, and would possibly cost a similar amount compared to any circuit to demultiplex.

RovertScott · Answer

I'm now considering if placing an LCD shutter between the CRT and the lens would be easier. I would like to keep everything as simple as possible, without need for additional Pis.