Reconstructing a Mixbook Movie with ffmpeg Mixbook emailed me to say my animated project was ready: a short movie built from my photos and set to music. I could watch it in the browser or order a printed copy. I could not download it. There is no download button, and Mixbook's help docs say one does not exist. I wanted the file. Getting it became a small reverse-engineering exercise, because the reason there's no download button is more interesting than a missing feature. There is no video file...