1. Reboot the device to see if it will return to normal;
2. Whether the memory card is often hot plugging and unplugging, plugging and unplugging the memory card needs to be operated in the case of camera power failure, often hot plugging and unplugging will cause the performance of the memory card to degrade, resulting in abnormal problems in the recorded video;
3. Whether the memory card reading rate is too low;
4. Replace the memory card.
