Cache audio waveforms and rescue oversized GIF previews

2026-09-16 23:48:17 +02:00
parent caf9b7db3a
commit 8f30ec14ad
7 changed files with 123 additions and 5 deletions
@@ -9,7 +9,14 @@ import { createHash } from "node:crypto";
 import { existsSync, mkdirSync, mkdtempSync, rmSync } from "node:fs";
 import { tmpdir } from "node:os";
 import { join } from "node:path";
-import { downloadOne, downloadPreview, gifPoster, previewUrlFor, videoPoster } from "../src/download.js";
+import {
+    downloadOne,
+    downloadPreview,
+    gifPoster,
+    previewUrlFor,
+    remoteFrame,
+    videoPoster
+} from "../src/download.js";
 import { ogImageFromHtml, resolveEmbedPreview } from "../src/embed-preview.js";
 import { ScrapeEngine, type FetchPage, type ScrapeBackend } from "../src/engine.js";
 import { extractMedia } from "../src/extract.js";
@@ -954,6 +961,33 @@ void (async () => {
        );
    });

+    await test("remoteFrame renders an audio waveform", async () => {
+        const dir = join(root, "waveform-test");
+        mkdirSync(dir, { recursive: true });
+        const wavPath = join(dir, "tone.wav");
+
+        try {
+            execFileSync("ffmpeg", [
+                "-v",
+                "error",
+                "-y",
+                "-f",
+                "lavfi",
+                "-i",
+                "sine=frequency=440:duration=1",
+                wavPath
+            ]);
+        } catch {
+            console.log("ok - remoteFrame skipped (no ffmpeg)");
+            return;
+        }
+
+        const frame = await remoteFrame(wavPath, dir, { waveform: true });
+        assert.ok(frame?.hash);
+        assert.ok((frame?.bytes ?? 0) > 0);
+        assert.equal(existsSync(join(dir, `${frame?.hash}.webp`)), true);
+    });
+
    await test("snowflake helpers round-trip dates", () => {
        const id = snowflakeFromIso("2026-09-16T00:00:00.000Z");
        assert.ok(id);