Render a local product video you can edit and rerun.

BEFORE YOU RUN IT

Keep the boundary visible.

• Use a local PNG, JPEG, WebP, PPM or an FFmpeg-readable product video.
• Keep the title within 60 characters. Write three short English blocks: hook, body and cta. Each must be 84 characters or fewer; long words are wrapped.
• Choose 15–30 seconds. Add your own voiceover only when you have a local audio file; the Skill has no text-to-speech path.
• Render into a new output directory for every revision. Existing output files are never silently replaced.

01 / VERIFIED SAMPLE

Run the same input that produced the public preview.

These commands make a clean folder, download the v0.1.1 package and use the public sample image. The sample is an original synthetic interface illustration. It is not a recording of the current FeedSkills website or a customer result.

mkdir -p feedskills-video-demo/assets
cd feedskills-video-demo
curl -fL https://feedskills.com/downloads/product-video-starter-0.1.1.zip -o product-video-starter.zip
unzip -q product-video-starter.zip
curl -fL https://feedskills.com/examples/product-video-starter/alpha-revision/product-media.png -o assets/product-media.png

Save this input as input.json in feedskills-video-demo/:

{
  "title": "Make the next revision easier to review",
  "product_media": "./assets/product-media.png",
  "duration_seconds": 15,
  "copy": {
    "hook": "Compare the message before you publish.",
    "body": "Keep the same product view while the copy changes.",
    "cta": "Edit the project, then render another cut."
  }
}

Render from the extracted Skill folder and inspect the technical result:

node product-video-starter/scripts/render-video.mjs ./input.json --output ./output-verified
ffprobe -v error -show_entries format=duration:stream=codec_type,width,height -of default=noprint_wrappers=1 ./output-verified/video.mp4

The expected output is a 15-second silent MP4 plus captions.srt, project.json, render-report.json and README.md. Compare it with the verified public sample and its inspectable files; the recorded review passed FFmpeg decode and FFprobe checks, while the preview remains silent and does not claim narration acceptance.

02 / YOUR INPUT

Replace the media and copy without touching the Skill.

Put your own file beside the sample asset, then save this as my-input.json in the project root. Keep the paths relative to that JSON file. Remove voiceover_audio when the intended result is silent.

{
  "title": "A useful product detail",
  "product_media": "./assets/my-product.png",
  "duration_seconds": 15,
  "copy": {
    "hook": "Make the first detail easy to see.",
    "body": "Move through the product in one clear step.",
    "cta": "Try the workflow with your own asset."
  },
  "voiceover_audio": "./assets/my-voiceover.wav"
}

Render the revision into a different directory:

node product-video-starter/scripts/render-video.mjs ./my-input.json --output ./output-01

The command rejects missing files, unsupported audio, non-English caption blocks and overlong captions before rendering. A passing technical check means the file decoded and the declared streams exist; watch the complete MP4 and listen through any supplied narration before publishing.