Is there an easy way to insert a big countdown clock after a given time position of a video file in linux? The countdown clock should count down in seconds from n to 0.

Edit:

I don't want to insert manually pictures showing the nth second. It is clear to me how to do that. What I want is an automatic way to do this:

• Set the number of seconds for the countdown (e.g. 64 or 80 seconds)


• Set the time where to insert the countdown in a given video

And finally get the video with inserted countdown at specified position as a result.

It would be nice if this would be possible in a graphical video editor like openshot. However it would also be ok to have a command line solution for this.