ffmpeg merging 3 different streams

[paul.deitch]

So I am making a composite video to project during a party.
I have copy of Macbeth, a horror video and an erotic video.
Using ffmpeg I have split each of them into 5 sec segments.
I want to splice them all together as one stream as video1 5 secs, video2 5 secs, video3 5 secs, and I want the horror video running backwards.
Anyone know how to do all that? Thinking about it here is probably not the best place to ask but it's a start.

[Hanslow]

Something like this should work:

ffmpeg -i concat:"<vid1>|<vid2>|....|<vidN>" <output filename>

You might run into issues if they're not the same res/bitrate so you might want to first transcode them all to the same standard. Have a look at the help for concat anyway, that should lead you in the right direction.

To reverse it, I assume you're happy the audio will be backwards too, just run:

ffmpeg -i <source video> -vf reverse <output filename> (if you don't want reverse audio)
ffmpeg -i <source video> -vf reverse -af areverse <output filename> (if you do want reverse audio)

[eltawater]

If you're not wedded to using ffmpeg on the command line, you can do this in something like OpenShot in about 30 seconds by dragging each of three video segments into the track timeline and then setting the "Time" submenu of the horror segment to "Normal" "Backward".

[paul.deitch]

Thanks for the feedback. I got it "working" but the variety of video formats used caused some bad output. In the end I used OBS with a plug in that cycles through the input media without problems. Can thoroughly recommend it for what I was trying to do.