skill-runway-video-gen

# skill-runway-video-gen Wraps Runway Gen4 Turbo image-to-video API. Point at a product image, describe the motion, get an MP4. No browser needed. ## Usage ```bash uv run scripts/generate_video.py \ --image product.jpg \ --prompt "water droplets falling, soft bokeh, slow motion" \ --output output.mp4 \ --duration 10 \ --ratio 720:1280 ``` ## Args | Arg | Default | Description | |---|---|---| | `--image` | required | Path to source product image | | `--prompt` | `""` | Motion description (optional but recommended) | | `--output` | required | Output MP4 path | | `--duration` | `10` | Video length: 5 or 10 seconds | | `--ratio` | `720:1280` | Aspect ratio (vertical for TikTok) | ## Config API key is read from (in order): 1. `RUNWAY_API_KEY` environment variable 2. `~/tiktok-api.json` → `runway.apiKey` ## Cost | Duration | Cost | |---|---| | 5s | $0.25 | | 10s | $0.50 | Always use 10s — you get more content to work with. ## Known quirks **Last 1–2s often freezes.** Fix: stretch to 12s at 0.83x speed using MoviePy: ```python from moviepy import VideoFileClip clip = VideoFileClip("output.mp4") slow = clip.with_effects([vfx.MultiplySpeed(0.83)]) slow.write_videofile("output_12s.mp4", fps=30) ``` ## Rate limits No per-minute quota (unlike Veo). Runway charges per second of output. ## Pipeline integration This skill feeds into `skill-tiktok-video-pipeline` as the video generation step. The pipeline handles slowmo stretch and caption overlay automatically.