athina-ai/product-reel-generator

Product Reel Generator

You are a video production skill that takes an e-commerce product page URL and produces an Instagram-ready reel. The reel features AI-animated model clips (or Ken Burns product showcases), text overlays, and background music.

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Requirements

• FFmpeg installed and available in PATH (brew install ffmpeg on macOS, apt install ffmpeg on Linux)
• Python 3 with Pillow and python-dotenv packages (pip install Pillow python-dotenv)
• Higgsfield API credentials — HIGGSFIELD_API_KEY_ID and HIGGSFIELD_API_KEY_SECRET in a .env file (project root or any parent directory)

Before starting: Verify dependencies are available. If FFmpeg or Python packages are missing, instruct the user to install them before proceeding.

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Input

The user provides:

1. Product page URL (required) — any e-commerce product page (Shopify, Zara, DaMENSCH, etc.)
2. Music file (optional) — path to an MP3. If not provided, use a royalty-free track.
3. Style preset (optional) — one of: minimal, luxury, bold, editorial, clean. Defaults to auto-detect based on brand.
4. Brand name (optional) — for watermark. If not provided, extract from the page.

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Pipeline

Step 1: Scrape Product Images

Try these methods in order until one works:

1. Shopify JSON — append .json to the product URL and extract images from the response
2. HTML scraping with referrer — curl with -H "Referer: <site-domain>" and a browser user-agent
3. Chrome DevTools — navigate to page, extract image URLs via JavaScript, download

For each image, download at the highest available resolution.

Step 2: Classify Images (Heuristic)

Use image position on the product page as the primary signal:

| Position | Likely Type | Use In Reel | |----------|-------------|------------| | Image 1 (first on page) | Hero / front-facing model | Walk forward (AI) | | Image 2 | Alternate angle (side/back) | Turn or side walk (AI) | | Image 3-4 | Close-up or detail | Detail insert (Ken Burns) | | Last image | Size guide or back view | Back turn (AI) or product card |

Model detection heuristic: If image height > 1.5× width AND file size > 100KB → likely a model photo → use AI animation pipeline. Otherwise → product-only → use Ken Burns pipeline.

Step 3: Generate AI Video Clips

Use the Higgsfield API via this skill's scripts/higgsfield_video.py script or direct curl calls.

API details:

• Base URL: https://platform.higgsfield.ai
• Auth header: Authorization: Key {HIGGSFIELD_API_KEY_ID}:{HIGGSFIELD_API_KEY_SECRET}
• Always set "aspect_ratio": "9:16" for Instagram Reels

Model selection:

• Seedance (bytedance/seedance/v1/pro/image-to-video) — for hero/walk scenes. Higher quality, ~45 credits. Use for the most important clip.
• Kling (kling-video/v2.1/pro/image-to-video) — for secondary scenes. Good quality, ~6 credits. Use for turns, side angles.

Prompt guidelines:

• Always mention the clothing color and type in the prompt
• Specify direction of motion ("walks forward", "turns from front to side")
• Add "clean studio background" or describe the actual background
• Add "smooth cinematic motion" at the end
• For walk prompts, add "does not stop or turn around" to prevent reversal

Duration: Use "duration": 5 for each clip. Kling only supports 5 or 10.

Polling: After submission, poll GET /requests/{request_id}/status every 15 seconds until status: "completed". Then download the video from response.video.url.

Step 4: Create Ken Burns Scenes

For detail/texture shots where AI animation adds no value, use FFmpeg Ken Burns:

ffmpeg -y -loop 1 -i "detail.jpg" \
  -vf "scale=2160:3840,zoompan=z='1+0.06*in/75':x='iw/2-(iw/zoom/2)':y='ih/2-(ih/zoom/2)':d=75:s=1080x1920:fps=25" \
  -t 3 -c:v libx264 -pix_fmt yuv420p -r 25 "scene-detail.mp4"

Vary the zoom type: zoom-in, zoom-out, pan-left, pan-right, pan-up, pan-down.

Step 5: Create Text Overlays

Use Python Pillow to generate transparent PNG overlays, then composite with FFmpeg.

IMPORTANT: Many FFmpeg installations do NOT have the drawtext filter. Always use Pillow to create PNG text images, then overlay with:

ffmpeg -y -i video.mp4 -loop 1 -t <duration> -i overlay.png \
  -filter_complex "[1:v]format=rgba[txt];[0:v][txt]overlay=0:0" \
  -t <duration> -c:v libx264 -pix_fmt yuv420p -r 25 output.mp4

Style Presets

Fonts are provided as shared files in the pack's fonts/ directory (copied into each skill on install). Fall back to system fonts if custom fonts are not found.

| Preset | Title Font | Body Font | Text Color | Treatment | |--------|-----------|-----------|------------|-----------| | minimal | Montserrat-Light.ttf | Montserrat-Light.ttf | White (255,255,255) | No background, subtle shadow | | luxury | System Didot (/System/Library/Fonts/Supplemental/Didot.ttc) | Cormorant-Regular.ttf | Cream (245,235,210) | Thin gold stroke | | bold | System Futura (/System/Library/Fonts/Supplemental/Futura.ttc) | Montserrat-Bold.ttf | White | Dark backdrop bar, uppercase | | editorial | Cormorant-Italic.ttf | Cormorant-Regular.ttf | White | Minimal, italic titles | | clean | System Helvetica (/System/Library/Fonts/Helvetica.ttc) | System Helvetica | White | Simple shadow, professional |

Overlays to create:

1. Brand watermark — small text, top-right corner, persistent on all video scenes
2. Product info card — product name, price, CTA ("Shop now → website"), placed on the final scene with gradient background

Step 6: Compose the Reel

Model Reel Structure (when model photos detected)

| Time | Scene | Type | Duration | |------|-------|------|----------| | 0-5s | Hero — walk forward or full body | AI (Seedance) | 5s | | 5-10s | Alternate angle — side/back | AI (Kling) or Ken Burns | 5s | | 10-13s | Detail — texture, fabric, accessories | Ken Burns | 3s | | 13-16s | Third angle — back turn or close-up | AI (Kling) | 3s | | 16-20s | Product card + CTA | Static + text overlay | 4s |

Target: 80% video, 20% static. The product card at the end is fine as static.

If a generated AI clip looks bad (distortion, wrong face, backward motion), replace with Ken Burns from the same source image.

Product-Only Reel Structure (no model photos)

| Time | Scene | Type | Duration | |------|-------|------|----------| | 0-3s | Hero reveal | Ken Burns zoom-out | 3s | | 3-6s | Detail 1 | Ken Burns zoom-in | 3s | | 6-9s | Alternate angle | Ken Burns pan | 3s | | 9-12s | Detail 2 | Ken Burns zoom | 3s | | 12-15s | Product card + CTA | Static + text | 3s |

Stitching

Concatenate all scenes with FFmpeg:

cat > concat.txt << EOF
file 'scene1.mp4'
file 'scene2.mp4'
...
EOF
ffmpeg -y -f concat -safe 0 -i concat.txt -c:v libx264 -pix_fmt yuv420p -r 25 reel-silent.mp4

Step 7: Add Audio

Mix background music with the silent reel:

ffmpeg -y -i reel-silent.mp4 -i music.mp3 \
  -filter_complex "[1:a]atrim=<start>:<end>,asetpts=PTS-STARTPTS,afade=t=in:st=0:d=1.5,afade=t=out:st=<fade_start>:d=2,volume=0.5[aud]" \
  -map 0:v -map "[aud]" -c:v copy -c:a aac -shortest output.mp4

If no music file is provided, ask the user to supply one or search for a royalty-free track (e.g., Kevin MacLeod's library at incompetech.com). The user should provide a local file path or URL.

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Output

Save the final reel to a user-specified directory (or the current working directory).

Output specs:

• Format: MP4 (H.264)
• Resolution: 1080×1920 (9:16 portrait)
• Frame rate: 25fps
• Duration: 15-20 seconds
• Audio: AAC

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Known Limitations

1. Multi-clip cohesion — independently generated AI clips may have slightly different faces or clothing details. Mitigate by using different source images (not same image with different prompts) and keeping clips short (3-5s each).
2. AI motion reversal — Kling sometimes reverses motion (walk forward then backward). Seedance handles this better. Use Seedance for walk scenes.
3. Enterprise CDN blocking — sites like Zara require Referer header. Always include -H "Referer: <site-domain>" in curl downloads.
4. Flat-lay animation — AI animation adds no visible value to flat-lay/product-on-surface photos. Use Ken Burns instead (free, equally effective).
5. No drawtext in FFmpeg — many FFmpeg installations lack the drawtext filter. Always use Pillow for text → PNG → overlay.

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Cost Estimate Per Reel

| Component | Credits | Approx Cost | |-----------|---------|-------------| | 1× Seedance clip (hero) | ~45 | ~$2.50 | | 1-2× Kling clips (secondary) | ~6-12 | ~$0.60-1.20 | | Ken Burns + text overlays | 0 | Free | | Total per reel | ~51-57 | ~$3-4 |