Introduction
This is a compact home virtual production stage — a scaled-down version of the LED wall setups used in film and broadcast. Built from a mix of consumer and prosumer gear, it’s designed to test multi-display routing, keying, and monitoring workflows without the footprint (or price tag) of a full studio volume.
Goals & Features
Some of the goals I had when putting this stage together:
▸ Multi-display playback — drive a wall of TVs as a single stage background.
▸ Basic chroma key — using the ATEM’s built-in keyer for quick composites.
▸ Confidence monitoring — ensuring the operator sees what the wall is displaying.
▸ Flexible routing — feed both raw laptop outputs and switched program signals into the Matrix.
▸ Room to grow — keep a path open to 4K switching, multi-user setups, and dedicated render heads.
Simplified Wiring
Hardware Spotlight: ATEM Mini Pro
Blackmagic Design ATEM Mini Pro
Compact live switcher designed for streaming and multicam. Supports up to 4 HDMI inputs (1080p max). Includes built-in chroma keying, picture-in-picture effects, transitions, and media playback. Outputs via HDMI or USB-C, and can stream directly. In this setup, it provides both the switching function and the chroma key feature for real-time composites.
Hardware Spotlight: Targus DOCK190
Targus DOCK190 Dual-Video 4K Docking Station
Uses DisplayLink technology to deliver dual HDMI outputs from a single USB-C input. Spec’d to handle dual 4K monitors (with driver compression and bandwidth limits). Provides power delivery up to 100W, plus USB/ethernet expansion. In this setup, it allows the Predator Helios 300 laptop to drive two HDMI feeds for routing into the ATEM and Matrix.
Full Routing
Summary
Even at 2K, this stage demonstrates how small-scale routing can mimic the flow of professional virtual production setups. By layering docks, splitters, routing, and monitoring, the system can drive a four-panel wall while keeping flexibility for program feeds and expansion.
Bottlenecks & Limitations
ATEM Mini Pro: limited to 1080p; hard ceiling on resolution.
Targus DOCK190 (DisplayLink): spec’d for dual 4K, but USB bandwidth and compression often reduce it to 1080p in practice.
Laptop GPU: Acer Predator Helios 300 (Intel i7, RTX 2060, 16GB RAM) is still capable, but aging, and bottlenecked by USB-C/DisplayLink.
Displays: mixed models (Hisense and Samsung), not uniform in color/latency.
Concerns about matrix clamping values;
Cost Estimate (<$3k Approximate, USD)
Acer Predator Helios 300 Laptop: $800–1,000
Targus DOCK190: $125
Blackmagic ATEM Mini Pro: $295
OREI 4×4 HDMI Matrix/Wall Processor: $160
HP Z8 Frankenstein: ~$600 (rebuilt from salvaged parts)
Hisense 50” QD6 Series (2025 QLED 4K UHD Smart) ×2: $250 each = $500
Samsung CU8000 50” UHD TVs ×2: $250 each = $500
Confidence Monitor (generic HDMI): $20
HDMI splitters, cables, odds & ends: $200
Total (as built): ~$2,700–2,900, USD)
4K-Capable Variant
A future upgrade path would be replacing the Mini Pro with an ATEM Constellation 4K (starting around $995 for a 1 M/E model) or similar. This would provide true 4K input/output, more inputs for both the Laptop and HP Z8 Frankenstein, and multiple aux outs. The video-wall processor would still be required to tile across the four TVs.
Plans Going Forward
4K Switching & Routing: Evaluate Constellation 4K or similar switchers. Confirm DisplayLink Bandwidth:
Test USB-C throughput vs direct GPU HDMI/DP output to verify if DisplayLink is capping me at 1080p.
Secondary Computer Integration: The HP Z8 Frankenstein is currently 2K; long-term, it could become part of a multi-user workflow, likely requiring a KVM switch and rerouting desk peripherals. Eventually, it could serve as a dedicated render head.
Display Wall Consistency: Move toward matched panels for consistent performance.
Display Wall expansion : adding 3x more 50” or one larger screen if I need larger coverage
Experiment with adding projectors
