Initial commit: RHINE LAB · ANALYSIS OS：三维界面与动效实验（本仓库不含个人归档索引数据）

2026-09-19 13:04:56 +08:00
commit 3f422218a5
1098 changed files with 39410 additions and 0 deletions
@@ -0,0 +1,66 @@
+// Read the local source only; emit measured levels, not a subjective listening report.
+// node scripts/analyze-reference-audio.mjs path/to/ffmpeg.exe
+import fs from "node:fs";
+import { execFileSync } from "node:child_process";
+const video = fs.readdirSync(".").find((x) => x.endsWith(".mp4"));
+if (!video || !process.argv[2])
+  throw Error("Local reference video and ffmpeg path required");
+const rate = 24000;
+const pcm = execFileSync(
+  process.argv[2],
+  [
+    "-v",
+    "error",
+    "-ss",
+    "6.76",
+    "-i",
+    video,
+    "-t",
+    "33.24",
+    "-vn",
+    "-af",
+    "pan=mono|c0=0.5*c0+0.5*c1",
+    "-ac",
+    "1",
+    "-ar",
+    String(rate),
+    "-f",
+    "f32le",
+    "pipe:1",
+  ],
+  { maxBuffer: 16 * 1024 * 1024 },
+);
+const samples = new Float32Array(pcm.buffer, pcm.byteOffset, pcm.length / 4);
+const bounds = [6.76, 9.16, 11.12, 19.48, 22.76, 26.92, 30.68, 33.3, 40];
+const stages = bounds.slice(0, -1).map((start, i) => {
+  const data = samples.subarray(
+    Math.round((start - 6.76) * rate),
+    Math.round((bounds[i + 1] - 6.76) * rate),
+  );
+  let peak = 0,
+    sum = 0;
+  for (const x of data) {
+    peak = Math.max(peak, Math.abs(x));
+    sum += x * x;
+  }
+  return {
+    start,
+    end: bounds[i + 1],
+    peakDb: +(20 * Math.log10(peak)).toFixed(2),
+    rmsDb: +(10 * Math.log10(sum / data.length)).toFixed(2),
+  };
+});
+fs.writeFileSync(
+  "reference/audio-analysis.json",
+  JSON.stringify(
+    {
+      video,
+      scope:
+        "6.76–40 s, mono downmix; not a transcription or melody identification",
+      stages,
+    },
+    null,
+    2,
+  ) + "\n",
+);
+console.log(stages);