An image processor and an operating method thereof are provided. The image processor includes: an audio data processing unit having a timer for providing audio data and information about time increment thereof; an image capturing unit for generating a number of video frames through photographing; a video data processing unit for generating each of video data and information about time increment thereof using the number of video frames, and providing the video data and the information about the time increments thereof; and a memory for storing the audio data and the information about the audio time increment, the video data and the information about the video time increment.