Won't record video

Overview

Photo works but video won't record or files corrupt.

DJI gimbal, GoPro on FPV, HDZero/Walksnail, microSD V30+.

Symptoms

Typical "Won't record video" signs in flight, app or OSD:

• Record button greyed out
• 0 byte files
• Overheating stops recording
• Test record on ground before flight.

Common causes

Before replacing parts, rule out software, mechanical and environmental causes:

• SD too slow for bitrate
• Codec/H.265 device incompatible
• Camera overheating

Tools needed

Prepare before diagnostics — saves time in the field:

• microSD V30/U3
• Microfiber cloth
• Gimbal guard for transport

Step-by-step fix

Work safely: battery off when working on ESC/motors; props removed; after repair — VLOS test flight.

• Try H.264 instead of H.265.
• Allow cooldown after hot flight.
• Lower resolution/FPS for test.

Additional diagnostics

Test record on ground before flight.

Format SD in aircraft, not PC (FAT32/exFAT).

Shutter 2× FPS — reduces jello.

When to contact service

If any of the following apply — do not fly and contact authorised service:

• Gimbal motor overload after calibration.
• Physical SD slot damage.
• Camera won't focus after impact — service.

Prevention

Prevention reduces failure risk and supports EASA Open / VLOS compliance:

• Test record on ground

Frequently asked questions

Is it safe to fly with "Won't record video"?

No if the fault affects navigation, power, ESC or link. Fix on the ground first, then conduct a VLOS test flight in open area.

How long does diagnosis take?

Most “Won't record video” cases — 15–45 min on the ground. Complex ones (firmware, hardware) may need 1–2 h and service.

Must I register repair with the NAA?

No mandatory repair registration, but a maintenance log is recommended for commercial operations.