Discord Sticker ffmpeg APNG command

discord-sticker-ffmepg-apng.md

$ ffmpeg -r 26 -i <file>%05d.png -plays 0 -pred 5 -f apng -vf "scale=320:320" -pix_fmt monob output.png

-r        framerate
-i        input (%05d = zero-padded digit)
-plays    APNG loop mode
              0         = infinite loop
              1         = no loop
              2-65535   = n loops
-pred     PNG filter algorithm
              0         = none - the scanline is transmitted unmodified
              1         = sub - transmits the difference between each byte and the value of the corresponding byte of the prior pixel
              2         = up - just like the Sub filter except that the pixel immediately above the current pixel, is used
              3         = avg - uses the average of the two neighboring pixels (left and above) to predict the value of a pixel
              4         = paeth - computes a simple linear function of the three neighboring pixels
              5         = mixed - uses the best filter algorithm for each line (usually has better compression)
-f        format
-vf       video filter (comma-separated) - scale=widht:height
-pix_fmt  pixel format / color depth
              monob     = 8-bit monochrome