No, the DJI Mic Mini is not compatible with the GoPro Hero12 Black.
DJI Mic Mini's wired outputs are USB-C and 3.5mm TRS. GoPro Hero12 Black has no native 3.5mm or wired mic port -- GoPro's own tech specs list no 3.5mm jack, only Bluetooth Audio Support (not DJI Mic Mini's RF transmission system), and route wired mic input through the separate Media Mod accessory (explicitly listed as H12B-compatible). Requires GoPro's Media Mod.
What works instead
See all compatible microphone for the DJI Mic Mini →“Connector USB-C HDMI Port Media Mod (H9B/H10B/H11B/H12B)”
“DJI Mic Mini Camera Audio Cable (3.5mm TRS) × 1 DJI Mic Mini Mobile Phone Adapter (Type-C) × 1”
Last verified:
Confidence: high confidence