ai-video-gen（AI 视频生成器）

AI Video Generation Skill

Generate complete videos from text descriptions using AI.

Capabilities

1. Image Generation - DALL-E 3, Stable Diffusion, Flux
2. Video Generation - LumaAI, Runway, Replicate models
3. Voice-over - OpenAI TTS, ElevenLabs
4. Video Editing - FFmpeg assembly, transitions, overlays

Quick Start

# Generate a complete video
python skills/ai-video-gen/generate_video.py --prompt "A sunset over mountains" --output sunset.mp4

# Just images to video
python skills/ai-video-gen/images_to_video.py --images img1.png img2.png --output result.mp4

# Add voiceover
python skills/ai-video-gen/add_voiceover.py --video input.mp4 --text "Your narration" --output final.mp4

Setup

Required API Keys

Add to your environment or .env file:

# Image Generation (pick one)
OPENAI_API_KEY=sk-...              # DALL-E 3
REPLICATE_API_TOKEN=r8_...         # Stable Diffusion, Flux

# Video Generation (pick one)
LUMAAI_API_KEY=luma_...           # LumaAI Dream Machine
RUNWAY_API_KEY=...                # Runway ML
REPLICATE_API_TOKEN=r8_...        # Multiple models

# Voice (optional)
OPENAI_API_KEY=sk-...             # OpenAI TTS
ELEVENLABS_API_KEY=...            # ElevenLabs

# Or use FREE local options (no API needed)

Install Dependencies

pip install openai requests pillow replicate python-dotenv

FFmpeg

Already installed via winget.

Usage Examples

1. Text to Video (Full Pipeline)

python skills/ai-video-gen/generate_video.py \
  --prompt "A futuristic city at night with flying cars" \
  --duration 5 \
  --voiceover "Welcome to the future" \
  --output future_city.mp4

2. Multiple Scenes

python skills/ai-video-gen/multi_scene.py \
  --scenes "Morning sunrise" "Busy city street" "Peaceful night" \
  --duration 3 \
  --output day_in_life.mp4

3. Image Sequence to Video

python skills/ai-video-gen/images_to_video.py \
  --images frame1.png frame2.png frame3.png \
  --fps 24 \
  --output animation.mp4

Workflow Options

Budget Mode (FREE)

• Image: Stable Diffusion (local or free API)
• Video: Open source models
• Voice: OpenAI TTS (cheap) or free TTS
• Edit: FFmpeg

Quality Mode (Paid)

• Image: DALL-E 3 or Midjourney
• Video: Runway Gen-3 or LumaAI
• Voice: ElevenLabs
• Edit: FFmpeg + effects

Scripts Reference

• generate_video.py - Main end-to-end generator
• images_to_video.py - Convert image sequence to video
• add_voiceover.py - Add narration to existing video
• multi_scene.py - Create multi-scene videos
• edit_video.py - Apply effects, transitions, overlays

API Cost Estimates

• DALL-E 3: ~$0.04-0.08 per image
• Replicate: ~$0.01-0.10 per generation
• LumaAI: $0-0.50 per 5sec (free tier available)
• Runway: ~$0.05 per second
• OpenAI TTS: ~$0.015 per 1K characters
• ElevenLabs: ~$0.30 per 1K characters (better quality)

Examples

See examples/ folder for sample outputs and prompts.