AVMatrix DE21‑4K PRO 4K HDMI-NDI encoder / decoder

AVMatrix DE21-4K PRO

AVMatrix DE21-4K PRO – 4K60 HDMI-NDI Bi-Directional Converter: Full-bandwidth NDI|HX/NDI-HX2 encoding/decoding, YCbCr 4:2:2 8-bit, PoE + USB-C power, 3.5mm audio embed/de-embed, LCD + tally, web GUI, detachable bracket.

The AVMatrix DE21-4K PRO is a compact, professional-grade 4K60 HDMI-NDI converter that brings true full-bandwidth NDI to any HDMI workflow. Supporting both NDI|HX and full NDI (up to 250 Mbps), it delivers pristine YCbCr 4:2:2 8-bit video with zero perceptible compression artifacts—perfect for live production, IMAG, or studio integration.

Bi-directional operation lets you send 4K60 HDMI sources into the NDI ecosystem or pull any NDI stream (including 4K60) out to HDMI displays, switchers, or recorders. Power via PoE (802.3af/at) or 5-18V USB-C (great for battery rigs). The built-in 3.5mm jack handles analog audio embed/de-embed, while the bright LCD shows real-time tally, source name, resolution, and IP status. A detachable cold-shoe/mounting bracket and 1/4"-20 threads make rigging a breeze. Plug-and-play with zero drivers, plus a full web interface for advanced settings (bitrate, audio gain, tally color, etc.).

Whether you’re adding NDI to a cinema camera, feeding NDI to a 4K projector, or building a hybrid HDMI/NDI studio, the DE21-4K PRO delivers rock-solid, low-latency performance in a pocket-sized aluminum chassis.

Key Features

• True 4K60 NDI – Full NDI & NDI|HX2 encoding/decoding (up to 250 Mbps)
• YCbCr 4:2:2 8-bit – Broadcast-quality color sampling
• Bi-Directional Conversion – HDMI → NDI or NDI → HDMI simultaneously
• PoE + USB-C Power – 802.3af/at or 5-18V (perfect for V-mount battery plates)
• 3.5mm Analog Audio – Embed/de-embed line-level stereo audio
• LCD + Tally – On-device status and red/blue tally indicators
• Web GUI – Full configuration via browser (no software needed)
• Detachable Bracket – Cold shoe + 1/4"-20 threads for flexible mounting