added and fix some of things

Signed-off-by: Kenneth Obsequio <k80308392@gmail.com>

services/ffmpeg.service.js

@@ -99,4 +99,52 @@ function remuxToFaststartMp4(inputUrl, { timeoutMs = 30 * 60 * 1000 } = {}) {
   });
 }
 
-module.exports = { needsRemux, remuxToFaststartMp4 };
+// Grabs a single frame from a video as a JPEG thumbnail — used when a video
+// asset lands with no client-provided thumbnail (see finalizeAssetFromStorage
+// in assets.controller.js). Unlike remuxToFaststartMp4 above, this is cheap
+// enough (one frame, not a full re-encode/copy) to run inline during the
+// upload-finalize request rather than as a background job.
+//
+// input:  presigned GET URL for the video, + its duration (seconds, from
+//         ffprobe) to pick a safe seek point.
+// output: local filesystem path to the extracted .jpg (caller owns cleanup).
+function extractFrameThumbnail(inputUrl, duration, { timeoutMs = 30 * 1000 } = {}) {
+  // Seek 1s in, or the midpoint for clips shorter than ~2s — avoids grabbing
+  // frame 0, which is often black/blank on screen recordings and slates.
+  const atSeconds = !duration || duration <= 0 ? 0 : Math.min(1, duration / 2);
+  const outputPath = path.join(os.tmpdir(), `thumb_${Date.now()}_${crypto.randomBytes(4).toString("hex")}.jpg`);
+
+  return new Promise((resolve, reject) => {
+    let settled = false;
+
+    const command = ffmpeg(inputUrl)
+      .seekInput(atSeconds) // input-side seek — fast, keyframe-based
+      .outputOptions(["-frames:v 1", "-q:v 2"]);
+
+    const timer = setTimeout(() => {
+      if (settled) return;
+      settled = true;
+      command.kill("SIGKILL");
+      fs.promises.unlink(outputPath).catch(() => {});
+      reject(new Error(`Thumbnail extraction timed out after ${timeoutMs}ms`));
+    }, timeoutMs);
+
+    command
+      .on("error", (err) => {
+        if (settled) return;
+        settled = true;
+        clearTimeout(timer);
+        fs.promises.unlink(outputPath).catch(() => {});
+        reject(err);
+      })
+      .on("end", () => {
+        if (settled) return;
+        settled = true;
+        clearTimeout(timer);
+        resolve(outputPath);
+      })
+      .save(outputPath);
+  });
+}
+
+module.exports = { needsRemux, remuxToFaststartMp4, extractFrameThumbnail };