keyframe n. a moment that felt innocuous at the time but ended up marking a diversion into a strange new era of your life—a chance meeting you’d think back on for years, a harmless comment that sparked an ongoing feud, an idle musing that would come to define your entire career—a monumental shift secretly buried among the tiny imperceptible differences between one ordinary day and the next. In video compression, a key frame defines major changes in a scene. Most frames in compressed video are in-betweens, marking subtle incremental changes, but key frames depict a whole new scene. This
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