In this example .mp4 video, I extracted the frames as 369 invidual PNG files, with a total size of 193MB.<p>Encoding those 369 PNG files to a LOSSLESS BPG animation (using bpgenc 0.9.6 with options -lossless -a) produces a .bpg file of about 50MB.<p>Encoding them to APNG (using apngasm 2.7) results in a 57MB animated PNG file.<p>The corresponding progressive FLIF animation is 20 MB.<p>Obviously it is not a good idea to losslessly encode lossy images&#x2F;movies, as a lot of bytes are wasted on encoding compression artifacts.