embedded-video-pip-smooth-playback

Prevent stutter and frozen frames when embedding a child video inside a parent in code-driven pipelines (Remotion, After Effects scripting, FFmpeg filter graphs). Explains why sparse keyframes break frame-accurate seek during per-frame export, and how re-encoding with H.264 all-intra GOP (-g 1) and yuv420p makes every frame independently decodable. Includes FFmpeg command, parameter notes, file-size tradeoffs, and a reusable rule for any seek-heavy programmatic video workflow.