video overlay in linux

Question

linux

Good afternoon.
There are two video files. You have to put one on top of the other.
For a better understanding, here is an example:
Video #1 (telemetry): youtu.be/4y_N3mNqvmY
Video #2 (onboard): youtu.be/fgl6Cjurruk
Result: youtu.be/cIw--IxvsM0

Now I'm doing this in Pinnacle Studio by hand.
What are the ways to do this in the Linux console?
An ideal tool would be a console application that receives two video files in the parameters, the background color to be removed (for example, a green background in telemetry) and a shift in seconds to correctly combine the time on the video.
Are there ready made tools?
If there are no ready-made ones, perhaps there are libraries that allow you to do this?

Answer 1

Mencoder, ffmpeg?
Mencoder I know can overlay a picture. Of the video processing libraries, I used ffmpeg under C. Under python it should be easier.
BUT! You can also opencv - it should be quite simple here.