optipng

Optimize .png images. Smaller size, no quality loss.

optipng -o7 *.png

png2mp4

Convert a folder with enumerated .png files into a x264 Video i a .mp4 container with a given frame rate.

ffmpeg -f image2 -pattern_type glob -framerate 60 -i "img*.png" -vcodec libx264 vid.mp4

svg2png

Convert .svg into .png with white background.

inkscape -z -b \"#fff\" -e img.png -h 1080 img.svg

Or a complete folder:

for i in *.svg
    do inkscape -z -b \"#fff\" -e $(basename -s .svg $i).png -h 1080 $i
done