Generate video thumbnails (#4084)

* Generate video thumbnails

* import order

src/services/drive/generate-video-thumbnail.ts

@@ -0,0 +1,32 @@
+import * as fs from 'fs';
+import * as tmp from 'tmp';
+const ThumbnailGenerator = require('video-thumbnail-generator').default;
+
+export async function GenerateVideoThumbnail(path: string): Promise<Buffer> {
+	const [outDir, cleanup] = await new Promise<[string, any]>((res, rej) => {
+		tmp.dir((e, path, cleanup) => {
+			if (e) return rej(e);
+			res([path, cleanup]);
+		});
+	});
+
+	const tg = new ThumbnailGenerator({
+		sourcePath: path,
+		thumbnailPath: outDir,
+	});
+
+	await tg.generateOneByPercent(10, {
+		size: '498x280',
+		filename: 'output.png',
+	});
+
+	const outPath = `${outDir}/output.png`;
+
+	const buffer = fs.readFileSync(outPath);
+
+	// cleanup
+	fs.unlinkSync(outPath);
+	cleanup();
+
+	return buffer;
+}