How to join two stream and remove repeated parts automatically?

[masimon]

Hello everyone. I have no experience, I would like your help to resolve this issue. I have two files with the following characteristics:


[Attachment 37962 - Click to enlarge]

First video:
Only content of first video: 0 to 11 seconds.
Equal parts of video in first and second: 12 to 27 seconds.

Second video:
Equal parts of video in first and second: 1 to 16 seconds.
Only content of second video: 17 to 27 seconds.

How can I automatically combine these two videos in one content without parts of repeated video? [A + B - (A ∩ B)] ? I would like to do this automatically for a larger set of parts, because when I capture one stream with vlc it saves only random pieces containing between 20 and 30 seconds and generating videos containing equal parts to each other. Thank you all for attention and help if possible.