Adding a time stamp to a video
You can use ffmpeg to display current localtime:



ffmpeg -i input -vf "drawtext=fontfile=/usr/share/fonts/TTF/Vera.ttf: text='%{localtime}': x=(w-tw)/2: y=h-(2*lh): fontcolor=white: box=1: boxcolor=0x00000000@1" image%03d.png


See Can ffmpeg extract images from a video with timestamps? for more examples.