One, two, three, roll VTR. Brrrrrr. Here be a long, detailed tutorial on how to use ffmpeg, a powerful, multi-purpose audio and video processing software, including conversion and transcoding, scaling and quality, image extraction, combination and GIF creation, splitting and joining of videos, timestamps, subtitle extraction and embedding, video speedup and slowdown, smoothing effect and interpolation, and more. Unleash your inner Eisenstein. Or something.