vidgif.sh

#!/bin/sh

youtube-dl -o "_%(id)s.%(ext)s" $1

infile=$(ls | head -n1)

palette="/tmp/palette.png"

filters="fps=12,scale=500:-1:flags=lanczos"

ffmpeg -v warning -ss $2 -t $3 -i $infile -vf "$filters,palettegen=stats_mode=diff" -y $palette
ffmpeg -v warning -ss $2 -t $3 -i $infile -i $palette -lavfi "$filters [x]; [x][1:v] paletteuse=dither=none" -y anim.gif

rm $infile

other adjustable params (hard-coded, sry):

• fps: frames per second, value directly correlated with gif quality
• scale: width, in pixels, will scale gif proportionally

you gotta pip install youtube-dl also