wjs-reframing-video

# wjs-reframing-video Convert a video's orientation by **cropping** a narrow band from the source — not by physically rotating it. The crop window follows the **active speaker** (the face whose mouth is *moving*), not just the largest or most-confident face. A `.crop.json` sidecar records the crop plan, the per-segment speaker decisions, and the parameters used. The original input is never modified. ## When to use - Repurposing a 16:9 podcast / interview / talk for vertical short-video platforms (WeChat Channels 视频号, Douyin 抖音, Xiaohongshu 小红书, YouTube Shorts, TikTok, Reels). - Repurposing a 9:16 phone recording for horizontal players (YouTube long-form, blog embeds). - Repurposing 4:3 archive footage for 3:4 mobile, or vice versa. The output aspect is the source aspect with width and height swapped — 16:9 → 9:16, not "letterboxed 16:9 in a 9:16 frame". ## When NOT to use - **Multi-person Q&A** where each face needs its own crop — this skill picks one crop track per video. For per-speaker split renders, use **wjs-editing-multicam** instead. - **Animated content / B-roll with no faces** — falls back to center crop, usually wrong for the intent. - **Heavy camera motion in the source** (handheld pan/zoom) — the face tracker amplifies camera shake. Stabilize first. - **Source already at target aspect** — no work to do. ## What this skill IS — and IS NOT | Is | Is not | |---|---| | **Visual active-speaker detection** via MAR (mouth-aspect-ratio) variance | Audio-visual fus...