B-roll Avatar Camera (the avatar SEEN doing something)

The realistic action counterpart of the broll skills, starring our own avatar:

• broll-story → an illustrated 6-panel storyboard animated by seedance-2 (great for invented side-characters / stylized vignettes).
• broll-generator → presenter-free synthetic B-roll; broll-finder → real footage.
• broll-avatar-camera → OUR avatar, photoreal, DOING something — a single realistic action start frame (built like a camera angle) animated by prunaai/p-video-avatar, the same model as our talking-heads, driven by the beat's narration audio.

Why p-video-avatar (the same model as the talking-heads, not plain p-video): it keeps the avatar's face/wardrobe/room identical to the talking-head beats, and it's audio-driven — feed it the beat's narration slice and the avatar lip-syncs to it (when the mouth is visible) while the clip length matches the beat. The action itself is directed by the video_prompt param ("takes a book from a shelf while talking") and negative_prompt keeps unwanted stuff out. The clip is muted on disk; avatar-reel-composer re-lays the single master narration over it (so no double audio — the lip-sync visuals stay in sync because the same slice drove them).

When to use

The reel needs a beat where the avatar is seen DOING something in their own world while a narration line plays — to complement the words with action, where the movement matters more than the speech (the centered talking-head beats already carry the spoken delivery). Think: taking a book off a shelf, walking through the garden, tending the plants, building a sandcastle, lighting a candle, writing numbers, holding/handling an object — shot from varied angles. It's the "show, don't tell" insert between talking-head beats, the photoreal cousin of broll-story but starring the real avatar.

• Face/mouth visible in the action shot → the avatar lip-syncs the beat as a bonus (looks like them saying that line while doing the thing). This is the sweet spot for this skill.
• Face-free (true first-person POV of the hands, back-to-camera) or a precise object move with an exact start AND end pose → a talking-avatar model has no face to anchor; use seedance-2 with start+end frames instead (see REFERENCE.md).

Prerequisites

• gpt-image-2 ready (shared Replicate token) — builds the action start frame.
• Replicate token (shared, auto-discovered) for prunaai/p-video-avatar.
• The beat's narration audio slice (e.g. antiguo/reels/NNN_slug/scenes/chunk_sN.mp3, or a cut from narration.mp3) — this DRIVES the clip (lip-sync + length).
• ffmpeg on PATH — mutes the clip.
• pip3 install -r scripts/requirements.txt (replicate, pillow).
• A scene profile for the avatar (the same subject/wardrobe/scene/light JSON used by avatar-camera-angles; e.g. antiguo/scene.json) and an avatar reference image (antiguo/refs/antiguo_hero.png).

Pipeline

scene profile + avatar ref + an ACTION description
  │
1 build_frame.py  → gpt-image-2 → ONE action start frame (2:3 master + 9:16 crop, or 3:2 master + 16:9 crop with --crop169)
  │
2 make_broll_camera.py → prunaai/p-video-avatar
  │   inputs: image (start frame) + audio (beat slice) + video_prompt (action) + negative_prompt
  │   → download → mute (-an) → <avatar>/broll/camera/<NNN>_<slug>.mp4 + manifest.json
  │
3 hand off to avatar-reel-composer as a broll scene (broll_source: existing)

Hard rules (project)

• SHORT, positive ACTION in --video-prompt. This is the model's "how the person behaves while speaking" — put the action here, one short clause, positive: "takes a book from a shelf and looks at it while talking". Drop scene dressing/qualifiers and never write "hold still / static / no camera movement" — negative/static instructions confuse it. Name what the avatar DOES; lip-sync is automatic from the audio.
• Drive with the beat's narration audio. Pass --audio = the exact narration slice for this beat. It lip-syncs the avatar (if the mouth is visible) and sets the clip length to the beat, so the clip matches its slot. (--voice-script exists only as a generic built-in-TTS fallback for quick motion scouting — it is not the avatar's cloned voice.)
• Muted output. The clip is muted on disk; avatar-reel-composer re-lays the master narration. The same slice drove the lip-sync, so it stays in sync. (--keep-audio only for a standalone QA preview.)
• Identity stays locked because it's the same model as the talking-heads. Build the start frame from the avatar --ref + scene profile so the room/wardrobe match.
• Prefer clear gross-motor actions. Reaching, taking a book, walking, sweeping, planting read cleanly. p-video-avatar holds handled objects far better than plain p-video (a book stays coherent — cf. the old 006 page/​book flip), but still keep the action simple.
• Face-free or precise object move → use seedance-2 start+end instead. A talking-avatar model needs a face to anchor; for a true hands-only POV, a back-to-camera walk, or an exact start→end object move, generate a start and an end frame and interpolate with seedance-2 (--start-image / --end-image). See REFERENCE.md.
• No frozen frames / no Ken Burns. The clip length follows the audio, so pass the exact beat slice and the clip matches its slot (the composer trims, never freezes). Project rule since Cap. 6.
• Feed a 9:16 frame for a 9:16 reel clip, or a 16:9 frame (build_frame.py --crop169) for a 16:9 YouTube clip — p-video follows the input image's ratio.

Workflow

1 — Build the action start frame (the creative step)

Author the ACTION shot and render it with gpt-image-2 (locks wardrobe/room/light from the scene profile, composes the action). For an action where the avatar lip-syncs, keep the face/mouth in frame (--face visible); for an over-the-shoulder use --face partial:

python3 .cursor/skills/broll-avatar-camera/scripts/build_frame.py \
  --ref antiguo/refs/antiguo_hero.png \
  --scene-file antiguo/scene.json \
  --face visible \
  --action "three-quarter shot of the old mystic standing at his bookshelf, reaching up to \
pull a thick leather-bound tome from an upper shelf; upper body visible, indigo robe, candlelight" \
  --crop916 -o antiguo/broll/camera/_frames/ --slug antiguo_shelf_reach

Review the printed reel_916 frame; re-roll (--count, or tweak --action) until it reads right. Preview the prompt first with --print-prompt.

2 — Animate it, driven by the beat audio (the mechanical step)

Put the action in --video-prompt (short, positive) and the beat slice in --audio:

python3 .cursor/skills/broll-avatar-camera/scripts/make_broll_camera.py \
  --avatar-dir antiguo \
  --image antiguo/broll/camera/_frames/antiguo_shelf_reach_916.png \
  --audio antiguo/reels/NNN_slug/scenes/chunk_s4.mp3 \
  --action "takes a book from a shelf and looks at it while talking" \
  --slug antiguo-shelf-book

Writes <avatar>/broll/camera/<NNN>_<slug>.mp4 (muted, length = the audio) + a manifest entry, and prints a JSON summary. Useful flags: --audio PATH (the beat slice — lip-sync + length), --negative-prompt "…" (override the action-broll preset) / --use-profile-negative (reuse the avatar's talking_profile.json), --strength-negative-prompt, --resolution 1080p, --seed, --disable-prompt-upsampling (verbatim action prompt), --keep-audio (QA preview), --voice-script "…" (generic built-in TTS, scouting only).

3 — Hand off to avatar-reel-composer

Drop the clip into a storyboard broll scene; the composer lays the single master narration over it (the same slice that drove the lip-sync → in sync):

{ "id": "s4", "type": "broll", "broll_source": "existing",
  "broll_clip": "antiguo/broll/camera/001_antiguo-shelf-book.mp4",
  "motion": "none",
  "text": "the contiguous slice of the narration spoken over this beat" }

Notes / troubleshooting

• Action goes in --video-prompt, short + positive. If the avatar only talks and doesn't act, name the gesture explicitly ("takes a book… ", "writes numbers…"). If it warps, shorten the prompt and drop scene dressing / any static-negative phrasing.
• The audio is the driver. Length follows the audio; pass the exact beat slice so the clip matches its slot. Lip-sync shows only where the mouth is visible — that's expected and fine for an action beat (the movement is the point).
• Held objects are much more coherent than with plain p-video, but a heavy object move is still safer as a seedance-2 start+end interpolation.
• Face-free beats (hands-only POV, back-to-camera): don't use this script (no face to anchor); use seedance-2 start+end (REFERENCE.md) or shoot the action with the face partially in frame.
• Cost: p-video-avatar is billed like the talking-heads (per second at 720p/1080p); the clip is as long as the beat audio.
• Quick scout without burning the cloned voice: --voice-script "…" uses the model's generic built-in TTS just to preview the motion, then re-run with the real --audio beat.

Additional resources

• Action-shot prompt internals, p-video-avatar schema, seedance-2 start+end recipe, examples: REFERENCE.md
• Frame builder reuses: ~/.cursor/skills/gpt-image-2 (image gen). Sibling: avatar-talking-video (centered talking-heads, same model) and avatar-camera-angles (talking-head re-frames). Consumer: avatar-reel-composer (broll_source: existing).