ffmpeg -i IMG_0170.MOV IMG_0170.mp4; rm IMG_0170.MOV
ffmpeg -i IMG_0181.MOV IMG_0181.mp4; rm IMG_0181.MOV
ffmpeg -i IMG_0182.MOV IMG_0182.mp4; rm IMG_0182.MOV
ffmpeg -i IMG_0183.MOV IMG_0183.mp4; rm IMG_0183.MOV