FFMPEG GIF with transparency from png image sequence

code:gif

ffmpeg -i %03d.png -vf palettegen=reserve_transparent=1 palette.png

ffmpeg -framerate 5 -stream_loop 10 -i %03d.png -i palette.png -lavfi paletteuse=alpha_threshold=128 -gifflags -offsetting -r 60 out.gif

code: git

ffmpeg -y -i %03d.png -lavfi fps=50,palettegen palette.png

ffmpeg -framerate 5 -i %03d.png -i palette.png -lavfi "fps=50,paletteuse" -r 60 -y output.gif