On this page I record some handy commands I use in Ubuntu that aren’t easy to remember off the top of my head.

Turn a folder of PNGs into a video (requires mencoder):

1. cd into the image directory
2. mencoder mf://*.png -mf type=png:w=800:h=600:fps=1 -ovc lavc -lavcopts vcodec=mpeg4 -oac copy -o output.avi

This command makes a video 800×600 pixels at one frame per second. You can omit the dimensions or change file names, and change the framerate. Taken from ubuntuforums.