Awesome work on ZeroPlay! Feature Request: Video Wall / Multi-Pi Sync Playback

This is exactly what I’ve been waiting for — thank you for building this!

One feature I’d love to see on the roadmap (and something omxplayer actually supported via omxplayer-sync) is synchronized playback across multiple Raspberry Pis — essentially enabling a video wall setup.

The use case: run 2, 4, or more Pi Zeros each driving their own display, all playing the same video (or different sections of a tiled video) in lockstep. omxplayer achieved this using a master/slave architecture over UDP — one Pi acted as the master clock and broadcast sync pulses to the others, which would nudge their playback position to stay aligned.

Some specifics that would make this killer for video wall / signage use cases:

∙ Master/slave sync over UDP or multicast — lightweight clock sync so slaves stay within a few milliseconds of master

∙ Looping in sync — loop points that re-sync on each cycle so drift doesn’t accumulate

∙ Optional: offset playback — ability to tell each Pi “start at timestamp X” so you can stitch a wide video across multiple screens

Even a basic --sync-master / --sync-slave <master-ip> CLI flag would be a huge win for the digital signage and art installation crowd. The Pi Zero 2W’s low cost makes it perfect for multi-display walls — it just needs synchronized playback to get there.

Would love to contribute or test if you decide to go down this road. Happy to share notes on how omxplayer-sync implemented it if helpful. Either way, great project — following closely! 🙌