diff --git a/core/utils.py b/core/utils.py
index a8e2407..cae9bb8 100644
--- a/core/utils.py
+++ b/core/utils.py
@@ -3,7 +3,14 @@ import shutil
 
 sep = "/"
 if os.name == "nt":
-    sep = "/"
+    sep = "\\"
+
+
+def path(string):
+    if sep == "\\":
+        return string.replace("/", "\\")
+    return string
+
 
 def run_command(command, mode="silent"):
     if mode == "debug":
@@ -11,6 +18,7 @@ def run_command(command, mode="silent"):
     return os.popen(command).read()
 
 def detect_fps(input_path):
+    input_path = path(input_path)
     output = os.popen(f'ffprobe -v error -select_streams v -of default=noprint_wrappers=1:nokey=1 -show_entries stream=r_frame_rate "{input_path}"').read()
     if "/" in output:
         try:
@@ -21,24 +29,28 @@ def detect_fps(input_path):
 
 
 def set_fps(input_path, output_path, fps):
+    input_path, output_path = path(input_path), path(output_path)
     os.system(f'ffmpeg -i "{input_path}" -filter:v fps=fps={fps} "{output_path}"')
 
 
 def create_video(video_name, fps, output_dir):
+    output_dir = path(output_dir)
     os.system(f'ffmpeg -framerate {fps} -pattern_type glob -i "{output_dir}{sep}*.png" -c:v libx264 -pix_fmt yuv420p -y "{output_dir}{sep}output.mp4"')
 
 
 def extract_frames(input_path, output_dir):
+    input_path, output_dir = path(input_path), path(output_dir)
     os.system(f'ffmpeg -i "{input_path}" "{output_dir}{sep}%04d.png"')
 
 
 def add_audio(output_dir, target_path, keep_frames, output_file):
     video = target_path.split(sep)[-1]
     video_name = video.split(".")[0]
-    save_to = output_file if output_file else output_dir + f"{sep}swapped-" + video_name + ".mp4"
-    os.system(f'ffmpeg -i "{output_dir}{sep}output.mp4" -i "{output_dir}{sep}{video}" -c:v copy -map 0:v:0 -map 1:a:0 -y "{save_to}"')
+    save_to = output_file if output_file else output_dir + f"/swapped-" + video_name + ".mp4"
+    save_to_ff, output_dir_ff = path(save_to), path(output_dir)
+    os.system(f'ffmpeg -i "{output_dir_ff}{sep}output.mp4" -i "{output_dir_ff}{sep}{video}" -c:v copy -map 0:v:0 -map 1:a:0 -y "{save_to_ff}"')
     if not os.path.isfile(save_to):
-        shutil.move(output_dir + f"{sep}output.mp4", save_to)
+        shutil.move(output_dir + f"/output.mp4", save_to)
     if not keep_frames:
         shutil.rmtree(output_dir)
 
diff --git a/run.py b/run.py
index e9d172a..3f143e8 100644
--- a/run.py
+++ b/run.py
@@ -35,9 +35,6 @@ parser.add_argument('--keep-frames', help='keep frames directory', dest='keep_fr
 for name, value in vars(parser.parse_args()).items():
     args[name] = value
 
-sep = "/" # used for filepaths e.g. /root/path/output.mp4
-if sys.platform.startswith("win") or os.name == 'nt':
-    sep = "/" # for windows
 
 def start_processing():
     if args['gpu']:
@@ -89,27 +86,25 @@ def start():
     if is_img(target_path):
         process_img(args['source_img'], target_path)
         return
-    video_name = target_path.split(sep)[-1].split(".")[0]
-    output_dir = target_path.replace(target_path.split(sep)[-1], "") + sep + video_name
-    if sep == "\\":
-        output_dir = output_dir.lstrip("\\").rstrip("\\")
+    video_name = target_path.split("/")[-1].split(".")[0]
+    output_dir = target_path.replace(target_path.split("/")[-1], "") + "/" + video_name
     Path(output_dir).mkdir(exist_ok=True)
     fps = detect_fps(target_path)
     if not args['keep_fps'] and fps > 30:
-        this_path = output_dir + sep + video_name + ".mp4"
+        this_path = output_dir + "/" + video_name + ".mp4"
         set_fps(target_path, this_path, 30)
         target_path, fps = this_path, 30
     else:
         shutil.copy(target_path, output_dir)
     extract_frames(target_path, output_dir)
     args['frame_paths'] = tuple(sorted(
-        glob.glob(output_dir + f"{sep}*.png"),
-        key=lambda x: int(x.split(sep)[-1].replace(".png", ""))
+        glob.glob(output_dir + f"/*.png"),
+        key=lambda x: int(x.split("/")[-1].replace(".png", ""))
     ))
     start_processing()
     create_video(video_name, fps, output_dir)
     add_audio(output_dir, target_path, args['keep_frames'], args['output_file'])
-    save_path = args['output_file'] if args['output_file'] else output_dir + sep + video_name + ".mp4"
+    save_path = args['output_file'] if args['output_file'] else output_dir + "/" + video_name + ".mp4"
     print("\n\nVideo saved as:", save_path, "\n\n")