ffmpeg -i 3d_dam_break.webm -vf "crop=trunc(iw/2)*2:trunc(ih/2)*2" 3d_dam_break.mp4
ffmpeg -i fifty_bodies_500_density_sph_representation.webm -vf "crop=trunc(iw/2)*2:trunc(ih/2)*2" fifty_bodies_500_density_sph_representation.gif
ffmpeg -i 3d_dam_break.webm -vf "crop=trunc(iw/2)*2:trunc(ih/2)*2" 3d_dam_break.mp4
ffmpeg -i fifty_bodies_500_density_sph_representation.webm -vf "crop=trunc(iw/2)*2:trunc(ih/2)*2" fifty_bodies_500_density_sph_representation.gif