How to convert videos to GIF and then to animated JPEG XL

Steps to convert a part of a video to gif and then to animated jxl (JPEG XL):

ffmpeg -y -i movie.webm -ss 1:20 -to 1:26 -c copy clip.webm
mkdir output
ffmpeg -i clip.webm -vf scale=640:-1 -r 10 output/ffout%3d.png
convert -delay 8 -loop 0 output/ffout*.png clip-coarse.gif
convert -layers Optimize clip-coarse.gif clip.gif
cjxl clip.gif clip.jxl
rm -rf output clip-coarse.gif

Links

• Convert MOV to GIF using FFmpeg and ImageMagick
• How do I convert a video to GIF using ffmpeg, with reasonable quality?
• How can I get ffmpeg to convert a .mov to a .gif?