Creating screen timelapse with ffmpeg (multiple videos)

I use obs to record my screen. I already have a few videos on youtube and was quite interested in experimenting with a bit different format.

I’ve uploaded the final video here (without any sound for now).

As usual I reached out to trusty ffmpeg for speeding up and combining the videos.

# this removes audio
ffmpeg -i input1.mkv -filter:v "setpts=PTS/60" -an output1.mkv
ffmpeg -i input2.mkv -filter:v "setpts=PTS/60" -an output2.mkv

Now we list all the videos we want to combine in a file:

cat > files.txt <<EOF
file 'output1.mkv'
file 'output2.mkv'

Then we combine it with the following command:

ffmpeg -f concat -safe 0 -i files.txt -c copy output-combined.mkv

That’s it. Quick and easy.

I use mkv container with OBS as it seems to be the most flexibile.