{
 "tier": "t3",
 "kind": "upscale-only (no generation)",
 "source": "week07-t1.mp4 (576x1024, 124 frames, 24 fps)",
 "pipeline": [
  {
   "step": 1,
   "tool": "ffmpeg",
   "args": [
    "-v",
    "error",
    "-y",
    "-i",
    "week07-t1.mp4",
    "work/_t3/in/%06d.png"
   ],
   "note": "拆帧，PNG 无损"
  },
  {
   "step": 2,
   "tool": "realesrgan-ncnn-vulkan",
   "args": [
    "-i",
    "work/_t3/in",
    "-o",
    "work/_t3/out",
    "-n",
    "realesr-animevideov3",
    "-s",
    "2",
    "-m",
    "edit/tools/realesrgan/models",
    "-f",
    "png"
   ],
   "note": "animevideov3 x2：576x1024 -> 1152x2048"
  },
  {
   "step": 3,
   "tool": "ffmpeg",
   "args": [
    "-v",
    "error",
    "-y",
    "-framerate",
    "24",
    "-i",
    "work/_t3/out/%06d.png",
    "-vf",
    "scale=1080:1920:flags=lanczos",
    "-an",
    "-c:v",
    "libx264",
    "-preset",
    "slow",
    "-crf",
    "<crf>",
    "-pix_fmt",
    "yuv420p",
    "-movflags",
    "+faststart",
    "week07-t3.mp4"
   ],
   "note": "LANCZOS 下采到 1080x1920；crf 26 起，>2.5 MB 降到 28"
  }
 ],
 "output": {
  "file": "week07-t3.mp4",
  "resolution": "1080x1920",
  "poster": "week07-t3.avif",
  "limit_mb": 2.5
 }
}