please answer the question. I shot MLV by small files for 30 seconds. 40 minutes later the camera began to record video at a very low speed, about 6 megabytes instead of 38. I tried another card, which had the same low speed and there were no records on it. After 4 hours, I came home and tried again a record. The speed is normal again! As I understand it, is to protect it from overheating. Yes? How do I disable it?