Add .gitignore to exclude all node packages and lock files

skills/remotion-prompt-video/render.mjs

@@ -0,0 +1,89 @@
+/**
+ * render.mjs - Renders a video from a VideoScript JSON file.
+ *
+ * Usage: node render.mjs <script.json> [output.mp4]
+ */
+import { bundle } from "@remotion/bundler";
+import { renderMedia, selectComposition } from "@remotion/renderer";
+import path from "path";
+import fs from "fs";
+import { fileURLToPath } from "url";
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+async function main() {
+  const args = process.argv.slice(2);
+
+  if (args.length < 1) {
+    console.error("Usage: node render.mjs <script.json> [output.mp4]");
+    process.exit(1);
+  }
+
+  const scriptPath = path.resolve(args[0]);
+  const outputPath = args[1]
+    ? path.resolve(args[1])
+    : path.join(__dirname, "out", "video.mp4");
+
+  // Ensure output directory exists
+  const outputDir = path.dirname(outputPath);
+  if (!fs.existsSync(outputDir)) {
+    fs.mkdirSync(outputDir, { recursive: true });
+  }
+
+  console.log("Loading script:", scriptPath);
+  const script = JSON.parse(fs.readFileSync(scriptPath, "utf-8"));
+
+  console.log(`Video: "${script.title}"`);
+  console.log(`  Scenes: ${script.scenes.length}`);
+  console.log(`  Duration: ${script.totalDurationInSeconds}s`);
+  console.log(`  Resolution: ${script.width}x${script.height}`);
+  console.log(`  FPS: ${script.fps}`);
+
+  const totalFrames = script.totalDurationInSeconds * script.fps;
+
+  console.log("\nBundling Remotion project...");
+  const bundleLocation = await bundle({
+    entryPoint: path.resolve(__dirname, "src/index.ts"),
+    webpackOverride: (config) => config,
+  });
+
+  console.log("Selecting composition...");
+  const composition = await selectComposition({
+    serveUrl: bundleLocation,
+    id: "PromptVideo",
+    inputProps: { script },
+  });
+
+  // Override composition metadata with our script values
+  composition.durationInFrames = totalFrames;
+  composition.fps = script.fps;
+  composition.width = script.width;
+  composition.height = script.height;
+
+  console.log(`Rendering ${totalFrames} frames to ${outputPath} ...`);
+
+  let lastProgress = 0;
+  await renderMedia({
+    composition,
+    serveUrl: bundleLocation,
+    codec: "h264",
+    outputLocation: outputPath,
+    inputProps: { script },
+    onProgress: ({ progress }) => {
+      const pct = Math.floor(progress * 100);
+      if (pct >= lastProgress + 10) {
+        lastProgress = pct;
+        process.stdout.write(`  ${pct}%\r`);
+      }
+    },
+  });
+
+  const stats = fs.statSync(outputPath);
+  console.log(`\nDone! ${outputPath} (${(stats.size / 1024 / 1024).toFixed(2)} MB)`);
+}
+
+main().catch((err) => {
+  console.error("Render failed:", err.message || err);
+  process.exit(1);
+});