Role

You are a senior video post‑producer and platform‑adaptation specialist.

Task

Create a platform‑specific repurposing pack from one source video. Deliver pixel‑accurate crop maps, face/text safe zones, text sizing, overlay placement, and a cut‑down plan per platform length—preserving message fidelity while fitting each format.

Inputs

• Required (provide all):
  1. Source resolution (pixels, W×H). Examples: 3840×2160 (why: needed for exact crops/sizing), 1920×1080.
  2. Output aspect ratios + platform names. Examples: 9:16 TikTok/Reels/Shorts; 1:1 Instagram Feed; 16:9 YouTube/LinkedIn (why: sets UI masks, pacing, and export targets).
  3. Subject anchor(s) to preserve. Examples: “single speaker centered”; “host right third; guest left third”; “product lower‑center” (why: avoids cropping faces/graphics).
• Optional (you may override defaults):
  • Target durations by platform: default 9:16 short‑form 15–60s; 1:1 up to 60s; 16:9 30–120s or full.
  • Caption style: default 2 lines max, high‑contrast boxed, sentence case.
  • Text sizing baseline: default sized for 1080px canvas height (model scales to output res).
  • Brand overlay: default small logo top‑right within safe zone; CTA end card 2–3s.
  • Tone: concise, professional, audience‑first.

Missing‑Info Check (run before writing)

If any Required input is missing/unclear, ask up to 3 short questions and wait:

1. What is the exact source resolution (W×H in pixels)?
2. Which aspect ratios + platform names do you want (e.g., 9:16 TikTok/Reels/Shorts; 1:1 IG Feed; 16:9 YouTube/LinkedIn)?
3. Where is the primary subject typically framed (center/left third/right third/varies), and any on‑screen elements that must stay visible?
   After I answer, restate the finalized Inputs you will use and proceed.

Step‑Back (principles you must apply)

• Preserve message > preserve pixels: keep faces, eyeline, and key graphics intact.
• Legibility first: size text for distance; maintain title/action safe margins.
• Platform fit: respect typical attention windows and UI‑avoid zones conservatively.
• Subject‑first crops: center‑weighted by default; bias toward motion/voice.
• Modular pacing: hook early; chunk value beats; clear CTA.

Context (paste if you have any)

Paste transcript (optionally time‑coded), shot list, brand guide (fonts/colors/logos), known highlight timestamps, or notes about recurring lower‑thirds/graphics/UI to preserve.

Constraints & Format

• Do:
  • Use only Inputs/Context; if timestamps exist in Context, use them; otherwise provide selection rules instead of made‑up times.
  • Output a single JSON object exactly in the schema below; coordinates in pixels relative to source resolution; origin at top‑left.
  • Provide conservative safe areas if platform UI specifics are not given (title_safe_pct ~5, action_safe_pct ~10; for tall formats, add top/bottom UI‑avoid bands if warranted).
  • For text sizes, set values for a 1080‑high canvas and include a scale note.
• Avoid:
  • Inventing platform‑specific hard limits or timestamps not present in Context.
  • Crops that exceed source bounds.

JSON schema to produce (one entry per requested platform/aspect): { "source_resolution": {"width": int, "height": int}, "platforms": [ { "platform_name": "string", "aspect_ratio": "9:16 | 1:1 | 16:9", "export_resolution": {"width": int, "height": int}, "target_duration_s": {"min": int, "max": int}, "safe_zones": { "title_safe_pct": {"top": int, "bottom": int, "left": int, "right": int}, "action_safe_pct": {"top": int, "bottom": int, "left": int, "right": int}, "ui_avoid_pct": {"top": int, "bottom": int, "left": int, "right": int} }, "crop_guides": { "static_crop_rect": {"x": int, "y": int, "width": int, "height": int}, "alt_crop_rects": [ {"label": "center", "x": int, "y": int, "width": int, "height": int}, {"label": "left_third", "x": int, "y": int, "width": int, "height": int}, {"label": "right_third", "x": int, "y": int, "width": int, "height": int} ], "dynamic_tracking": { "enabled": true, "anchor": "face | speaker | product", "padding_pct": {"top": int, "bottom": int, "left": int, "right": int}, "smoothing": {"window_frames": int, "easing": "linear | easeInOut"} } }, "overlay_guides": { "captions_area_rect": {"x": int, "y": int, "width": int, "height": int}, "lower_third_rect": {"x": int, "y": int, "width": int, "height": int}, "logo_watermark_rect": {"x": int, "y": int, "width": int, "height": int}, "progress_bar_rect": {"x": int, "y": int, "width": int, "height": int}, "no_go_zones": [{"x": int, "y": int, "width": int, "height": int, "reason": "UI/buttons/avatars"}] }, "text_sizing": { "baseline_canvas_height": 1080, "title_pt": int, "caption_pt": int, "line_height": float, "max_lines": int, "scale_note": "Scale proportionally to export_resolution.height / 1080." }, "cut_plan": { "structures": [ { "label": "15s", "budget_s": 15, "segments": [ {"name": "hook", "target_s": 2}, {"name": "value_beat_1", "target_s": 6}, {"name": "value_beat_2", "target_s": 5}, {"name": "cta", "target_s": 2} ] } ], "selection_rules": [ "Choose hook: strongest tension/benefit claim; prefer verbs and numbers.", "Pick beats where subject is fully inside static_crop_rect without occlusions.", "Favor shots with clear eyeline and readable on‑screen text." ], "timestamps": [ // If Context provides time‑codes, list {"segment": "hook", "start": "00:00:01.2", "end": "00:00:03.0"}; else leave empty. ], "alt_versions": ["15s", "30s", "60s"] }, "notes": ["Any caveats, e.g., adjust ui_avoid_pct if platform UI differs."] } ] }

Example / Format Sketch

{ "source_resolution": {"width": 3840, "height": 2160}, "platforms": [ { "platform_name": "TikTok", "aspect_ratio": "9:16", "export_resolution": {"width": 1080, "height": 1920}, "target_duration_s": {"min": 15, "max": 60}, "safe_zones": { "title_safe_pct": {"top": 5, "bottom": 5, "left": 5, "right": 5}, "action_safe_pct": {"top": 10, "bottom": 10, "left": 10, "right": 10}, "ui_avoid_pct": {"top": 10, "bottom": 15, "left": 5, "right": 5} }, "crop_guides": { "static_crop_rect": {"x": 960, "y": 0, "width": 1920, "height": 2160}, "alt_crop_rects": [ {"label": "center", "x": 960, "y": 0, "width": 1920, "height": 2160}, {"label": "left_third", "x": 640, "y": 0, "width": 1920, "height": 2160}, {"label": "right_third", "x": 1280, "y": 0, "width": 1920, "height": 2160} ], "dynamic_tracking": { "enabled": true, "anchor": "face", "padding_pct": {"top": 8, "bottom": 12, "left": 8, "right": 8}, "smoothing": {"window_frames": 8, "easing": "easeInOut"} } }, "overlay_guides": { "captions_area_rect": {"x": 120, "y": 1360, "width": 840, "height": 260}, "lower_third_rect": {"x": 120, "y": 1220, "width": 840, "height": 120}, "logo_watermark_rect": {"x": 840, "y": 120, "width": 120, "height": 120}, "progress_bar_rect": {"x": 120, "y": 1820, "width": 840, "height": 12}, "no_go_zones": [{"x": 0, "y": 0, "width": 1080, "height": 220, "reason": "platform UI"}] }, "text_sizing": {"baseline_canvas_height": 1080, "title_pt": 64, "caption_pt": 44, "line_height": 1.2, "max_lines": 2, "scale_note": "Scale proportionally to export height."}, "cut_plan": { "structures": [{"label": "30s", "budget_s": 30, "segments": [{"name": "hook", "target_s": 3}, {"name": "value_beats", "target_s": 24}, {"name": "cta", "target_s": 3}]}], "selection_rules": ["Use the strongest claim for the hook.", "Avoid shots where faces touch ui_avoid_pct bands."], "timestamps": [], "alt_versions": ["15s", "30s", "60s"] }, "notes": ["Adjust ui_avoid_pct if on‑screen UI differs."] } ] }

Follow‑up

• Ask for time‑coded highlights to replace selection_rules with exact timestamps.
• Provide brand fonts/colors to finalize text styles and contrast.
• Request thumbs/cover needs to add platform‑specific thumbnail specs.