diff --git a/main.py b/main.py
index 55209ad..47a7a65 100644
--- a/main.py
+++ b/main.py
@@ -169,7 +169,7 @@ def main():
     prev_frame_path = None
     frame_count = 0
     for frame_paths in video_frames_to_disk_generator(video_path, output_dir):
-        logging.info(f"Processing frames: {frame_paths}")
+        logging.info(f"Processing frames: {len(frame_paths)}")
 
         if prev_frame_path is not None:
             img1 = prev_frame_path[-1]
@@ -193,12 +193,47 @@ def main():
 def builder():
     frames_dir = "output/frames"
     interpolated_dir = "output/interpolated"
-    list_path = "file_list.txt"
+    moved_dir = "output/moved"
     video_path = "source/video.mp4"
     output_video = "output/interpolated_video.mp4"
-    build_file_list('output/moved_frames', list_path)
-    merge_with_ffmpeg(video_path, list_path, output_video)
+    move_images(frames_dir, interpolated_dir, moved_dir)
 
+    cap = cv2.VideoCapture(video_path)
+
+    if not cap.isOpened():
+        raise ValueError("Cannot open original video")
+
+    fps = cap.get(cv2.CAP_PROP_FPS)
+    cmd = [
+        "ffmpeg",
+        "-y",
+        "-framerate", str(fps * 2),
+        "-i", f"{moved_dir}/img_%08d.png",
+        "-i", video_path,
+        "-c:v", "libx264",
+        "-c:a", "copy",
+        "-shortest",
+        output_video,
+    ]
+    logging.info("Running ffmpeg command to build final video: " + " ".join(cmd))
+    subprocess.run(cmd, check=True)
+
+
+def cleanup():
+    import os
+    import shutil
+    frames_dir = "output/frames"
+    interpolated_dir = "output/interpolated"
+    moved_dir = "output/moved"
+    os.makedirs(frames_dir, exist_ok=True)
+    os.makedirs(interpolated_dir, exist_ok=True)
+    os.makedirs(moved_dir, exist_ok=True)
+    shutil.rmtree(frames_dir)
+    shutil.rmtree(interpolated_dir)
+    shutil.rmtree(moved_dir)
 
 if __name__ == "__main__":
+    cleanup()
     main()
+    builder()
+    cleanup()