Using mencoder to join single images into a movie, in this example multiple still images (jpeg) are joined in a single .avi video

mencoder "mf://*.jpg" -o movie.avi -fps 5 -ovc lavc -x264encopts subq=6:frameref=6:bitrate:75:meumh:bframes=1:cabac:deblock -vf scale=640:480

mkv

mencoder mf://*.jpg -mf fps=25:type=jpg -ovc x264 -x264encopts bitrate=1200:threads=2 -o outputfile.mkv

• https://superuser.com/questions/249101/how-can-i-combine-30-000-images-into-a-timelapse-movie