media-composer

name: media-composer description: Turn photos, images, audio, and simple text overlays into shareable videos, especially YouTube-ready MP4 files. Use when Fermin wants to combine one or more images with audio, make a slideshow, export a video for YouTube, create a simple talking/static-image video, or prepare media in horizontal or vertical video formats.

Use this skill to build lightweight videos from still images and audio.

Default output

Prefer:

• MP4 container
• H.264 video codec
• AAC audio codec
• 1080p output
• 30 fps

Workflow

1. Confirm inputs: image(s), audio, optional title/captions, and target format.
2. Choose aspect ratio:
   • YouTube standard: 1920x1080
   • Shorts / Reels: 1080x1920
3. Choose render mode:
   • single still image + audio
   • slideshow from multiple images
   • still image + title overlay + audio
4. Build a simple video from the image timeline and audio.
5. Export as MP4 unless the user explicitly wants something else.
6. Return the output path and summarize the render settings.

Built-in expansion targets

• vertical preset
• multiple-image slideshow
• title overlay

Good use cases

• single photo + audio = MP4
• multiple photos + audio slideshow
• podcast-style static cover video
• simple background image with voice/audio
• YouTube upload preparation

Rules

• Prefer MP4 for final delivery.
• Keep the first version simple and reliable before adding advanced effects.
• Match the video duration to the audio duration.
• Avoid unnecessary transitions unless the user asks.

Read references when needed

• references/presets.md
• references/workflow.md
• references/ffmpeg-notes.md