The number "4" is the most intriguing part of this filename. In the sequential logic of a camera, mov00001.avi was usually a test—pointing the lens at the floor or a blinding sun, testing the microphone with a tentative "Hello? Is this recording?"
MOV: An Apple format that's compatible across Mac/iOS platforms. AVI: A once universal PC format that's now less widely used. MP4: Lightworks Sony A7S III, A7IV, FX3, FX30 - Custom File Names mov00004 avi new
video_writer = create_new_avi_file(file_path, fps, frame_size) The number "4" is the most intriguing part of this filename
Use ffmpeg for a quick analysis: