Work with input-overlay on obs studio.

Preview:

License: CC0

Notes about input-overlay v5.0: use zxc-arrows.json.

Notes about input-overlay v4.8: If you are using this version, go edit the zxc-arrows.ini:

1. Rename all 1_ at begin-of-line to 0_.
2. Rename all 2_ at begin-of-line to 1_.

Notes to myself: record a gif using obs, ffmpeg and gifsicle

ffmpeg -y -i a.flv a.mp4
ffmpeg -y -i a.mp4 -ss 00:00:19.50 -t 00:00:02 b.mp4 # -t / -to
ffmpeg -i b.mp4 -vf palettegen palette.png
ffmpeg -y -i b.mp4 -i palette.png -lavfi "fps=15,scale=640:360,paletteuse" b.gif
gifsicle -i b.gif --scale 0.5 -O3 -o c.gif