{
  "asset_id": "mermaid_wild",
  "tool": "Seedance via Anijam (ByteDance)",
  "tool_version": "1.x",
  "model_native_resolution": "1440x1440",
  "model_native_fps": 24,
  "source_image": "../../sources/mermaid_wild__source.png",
  "prompt_used": "../../prompts/RICA_ANIME_PROMPT_v3.md",
  "prompt_iteration": "v3 (anime 3)",
  "date_utc": "2026-05-16",
  "duration_seconds": 5,
  "background_color_intended": "neon green chroma key",
  "background_color_actual": "solid black (model ignored chroma green request)",
  "chroma_key_method": "ffmpeg colorkey black removal in post-process",
  "transparent_output": "seedance_v3_30fps_TRANSPARENT_hevc.mov (HEVC alpha, yuva420p, Safari/iOS friendly)",
  "outputs": {
    "native_24fps.mp4": "raw Seedance output",
    "30fps_mci.mp4": "ffmpeg minterpolate 24→30",
    "60fps_mci.mp4": "ffmpeg minterpolate 24→60",
    "30fps_loop_pingpong.mp4": "forward+reverse seamless loop 10s",
    "30fps_TRANSPARENT_hevc.mov": "chroma-key black removed, HEVC alpha",
    "sprite_atlas.png": "121 frames in 12x11 grid @256px each"
  },
  "user_feedback": "Generated for chroma green test but model still output black BG",
  "next_steps": "Try Anijam with explicit BG=green hardcoded if UI supports it, or accept black + chroma-key remove"
}