How do I stream a DJI drone directly to OBS Studio without lag?

Use CastZero Engine on your Windows PC. It converts incoming wireless RTMP video from the DJI Fly app or DJI RC 2 into a local UDP WebRTC stream (http://localhost:8889/streamkey) that decodes in OBS Studio under 50ms.

What is the best zero latency RTMP server for Windows?

CastZero Engine is purpose-built for low latency local RTMP and WebRTC video ingestion, offering sub-50ms delay for DJI drones, GoPro Hero cameras, and smartphone rigs.

FREE STREAMING TOOL

OBS STREAM DELAY & AUDIO SYNC CALCULATOR

Calculate precise frame delays, audio sync offset in milliseconds, and latency comparisons for your OBS Studio live production.

Video Frame Rate (FPS)

Frames Delayed / Out of Sync

REQUIRED OBS AUDIO OFFSET / SYNC DELAY

50 MS

3 frames at 60 FPS equals exactly 50ms delay. Set Sync Offset: 50ms in OBS Advanced Audio Properties.

LATENCY PROTOCOL COMPARISON

Protocol / Method	Average Latency	OBS Frame Delay (60fps)
CastZero WebRTC Bridge	Sub-50 ms	1 to 3 frames
Local TCP RTMP	150 - 300 ms	9 to 18 frames
Cloud RTMP (YouTube / Twitch Relay)	5,000 - 10,000 ms	300+ frames