diff --git a/README.md b/README.md
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+Take a video and replace the face in it with a face of your choice. You only need one image of the desired face. No dataset, no training.
+
+That's it, that's the software.
+
+![demo-gif](demo.gif)
+
+## Installation
+> Do not create any issues regarding installation problems. I am only responsible for issues in this program, use google for help.
+
+1. install `python`, `pip` and `git`
+2. install `ffmpeg`
+3. run the following commands in terminal:
+```
+git clone https://github.com/s0md3v/roop
+cd roop
+pip3 install -r requirements.txt
+```
+
+### Do you have a decent GPU?
+If you have a good enough GPU, you can use it to speed up the face-swapping process by running `run.py` with `--gpu` flag.
+If you plan on doing, you will need to install the appropriate `onnxruntime-*` package as follows:
+
+#### NVIDIA
+```
+pip3 install onnxruntime-gpu
+```
+#### AMD
+```
+git clone https://github.com/microsoft/onnxruntime
+cd onnxruntime
+./build.sh --config Release --build_wheel --update --build --parallel --cmake_extra_defines CMAKE_PREFIX_PATH=/opt/rocm/lib/cmake ONNXRUNTIME_VERSION=$ONNXRUNTIME_VERSION onnxruntime_BUILD_UNIT_TESTS=off --use_rocm --rocm_home=/opt/rocm
+pip install build/Linux/Release/dist/*.whl
+```
+
+## Usage
+> Note: When you run this program for the first time, it will download some models ~300MB in size.
+
+Executing `python run.py` command will launch this window:
+
+Choose a face (image with desired face) and the target image/video (image/video in which you want to replace the face) and click on `Start`. The output will be saved in `output.mp4` file.
+
+Don't touch the FPS checkbox unless you know what you are doing.
+
+Additional command line arguments are given below:
+```
+-h, --help            show this help message and exit
+-f SOURCE_IMG, --face SOURCE_IMG
+                        use this face
+-t TARGET_PATH, --target TARGET_PATH
+                        replace this face
+--keep-fps            keep original fps
+--gpu                 use gpu
+--keep-frames         don't delete frames directory
+```
+
+Looking for a CLI mode? Using the -f/--face argument will make the program in cli mode.
+
+## Future plans
+- [ ] Replace a selective face throughout the video
+- [ ] Support for replacing multiple faces
+
+## Credits
+- [ffmpeg](https://ffmpeg.org/): for making video related operations easy
+- [deepinsight](https://github.com/deepinsight): for their [insightface](https://github.com/deepinsight/insightface) project which provided a well-made library and models.
+- and all developers behind libraries used in this project.
diff --git a/core/__init__.py b/core/__init__.py
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+ 
diff --git a/core/config.py b/core/config.py
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+import insightface
+
+face_analyser = insightface.app.FaceAnalysis(name='buffalo_l', providers=['CUDAExecutionProvider', 'ROCMExecutionProvider', 'CPUExecutionProvider'])
+face_analyser.prepare(ctx_id=0, det_size=(640, 640))
+
+
+def get_face(img_data):
+    analysed = face_analyser.get(img_data)
+    return sorted(analysed, key=lambda x: x.bbox[0])[0]
diff --git a/core/processor.py b/core/processor.py
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+++ b/core/processor.py
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+import cv2
+import insightface
+from core.config import get_face
+from core.utils import rreplace
+
+face_swapper = insightface.model_zoo.get_model('inswapper_128.onnx', providers=['CUDAExecutionProvider', 'ROCMExecutionProvider', 'CPUExecutionProvider'])
+
+
+def process_video(source_img, frame_paths):
+    source_face = get_face(cv2.imread(source_img))
+    for frame_path in frame_paths:
+        frame = cv2.imread(frame_path)
+        try:
+            face = get_face(frame)
+            result = face_swapper.get(frame, face, source_face, paste_back=True)
+            cv2.imwrite(frame_path, result)
+        except Exception as e:
+            pass
+
+
+def process_img(source_img, target_path):
+    frame = cv2.imread(target_path)
+    face = get_face(frame)
+    source_face = get_face(cv2.imread(source_img))
+    result = face_swapper.get(frame, face, source_face, paste_back=True)
+    target_path = rreplace(target_path, "/", "/swapped-", 1) if "/" in target_path else "swapped-"+target_path
+    print(target_path)
+    cv2.imwrite(target_path, result)
diff --git a/core/utils.py b/core/utils.py
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+++ b/core/utils.py
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+import os
+import shutil
+
+def run_command(command, mode="silent"):
+    if mode == "debug":
+        return os.system(command)
+    return os.popen(command).read()
+
+def detect_fps(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:
+            return int(output.split("/")[0]) // int(output.split("/")[1])
+        except:
+            pass
+    return 60
+
+
+def set_fps(input_path, output_path, fps):
+    os.system(f"ffmpeg -i {input_path} -filter:v fps=fps={fps} {output_path}")
+
+
+def create_video(video_name, fps, output_dir):
+    os.system(f"ffmpeg -framerate {fps} -pattern_type glob -i '{output_dir}/*.png' -c:v libx264 -pix_fmt yuv420p -y {output_dir}/output.mp4")
+
+
+def extract_frames(input_path, output_dir):
+    os.system(f"ffmpeg -i {input_path} '{output_dir}/%04d.png'")
+
+
+def add_audio(current_dir, output_dir, target_path, keep_frames):
+    video = target_path.split("/")[-1]
+    video_name = video.split(".")[0]
+    os.system(f"ffmpeg -i {output_dir}/output.mp4 -i {output_dir}/{video} -c:v copy -map 0:v:0 -map 1:a:0 -y {current_dir}/swapped-{video_name}.mp4")
+    if not os.path.isfile(current_dir + "/swapped-" + video_name + ".mp4"):
+        shutil.move(output_dir + "/output.mp4", current_dir + "/swapped-" + video_name + ".mp4")
+    if not keep_frames:
+        shutil.rmtree(output_dir)
+
+
+def is_img(path):
+    return path.lower().endswith(("png", "jpg", "jpeg", "bmp"))
+
+def rreplace(s, old, new, occurrence):
+    li = s.rsplit(old, occurrence)
+    return new.join(li)
diff --git a/demo.gif b/demo.gif
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Binary files /dev/null and b/demo.gif differ
diff --git a/requirements.txt b/requirements.txt
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+++ b/requirements.txt
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+numpy
+opencv-python
+onnx
+insightface
diff --git a/run.py b/run.py
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+++ b/run.py
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+import glob
+import argparse
+import multiprocessing as mp
+import os
+from pathlib import Path
+import tkinter as tk
+from tkinter import filedialog
+from core.processor import process_video, process_img
+from core.utils import is_img, detect_fps, set_fps, create_video, add_audio, extract_frames
+import webbrowser
+import psutil
+import shutil
+
+pool = None
+args = {}
+
+parser = argparse.ArgumentParser()
+parser.add_argument('-f', '--face', help='use this face', dest='source_img')
+parser.add_argument('-t', '--target', help='replace this face', dest='target_path')
+parser.add_argument('--keep-fps', help='maintain original fps', dest='keep_fps', action='store_true', default=False)
+parser.add_argument('--gpu', help='use gpu', dest='gpu', action='store_true', default=False)
+parser.add_argument('--keep-frames', help='keep frames directory', dest='keep_frames', action='store_true', default=False)
+
+for name, value in vars(parser.parse_args()).items():
+    args[name] = value
+
+def start_processing():
+    if args['gpu']:
+        process_video(args['source_img'], args["frame_paths"])
+        return
+    frame_paths = args["frame_paths"]
+    n = len(frame_paths)//(psutil.cpu_count()-1)
+    processes = []
+    for i in range(0, len(frame_paths), n):
+        p = pool.apply_async(process_video, args=(args['source_img'], frame_paths[i:i+n],))
+        processes.append(p)
+    for p in processes:
+        p.get()
+    pool.close()
+    pool.join()
+
+
+def select_face():
+    args['source_img'] = filedialog.askopenfilename(title="Select a face")
+
+
+def select_target():
+    args['target_path'] = filedialog.askopenfilename(title="Select a target")
+
+
+def toggle_fps_limit():
+    args['keep_fps'] = limit_fps.get() != True
+
+
+def start():
+    global pool
+    pool = mp.Pool(psutil.cpu_count()-1)
+    current_dir = os.getcwd()
+    target_path = args['target_path']
+    if is_img(target_path):
+        process_img(args['source_img'], target_path)
+        return
+    video_name = target_path.split("/")[-1].split(".")[0]
+    output_dir = current_dir + "/" + 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 + "/" + 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 + "/*.png"),
+        key=lambda x: int(x.split("/")[-1].replace(".png", ""))
+    ))
+    start_processing()
+    create_video(video_name, fps, output_dir)
+    add_audio(current_dir, output_dir, target_path, args['keep_frames'])
+
+
+if __name__ == "__main__":
+    if args['source_img']:
+        start()
+        quit()
+    window = tk.Tk()
+    window.geometry("600x200")
+    window.title("roop")
+
+    # Contact information
+    support_link = tk.Label(window, text="Support the project ^_^", fg="red", cursor="hand2")
+    support_link.pack(padx=10, pady=10)
+    support_link.bind("<Button-1>", lambda e: webbrowser.open("https://github.com/sponsors/s0md3v"))
+
+    # Select a face button
+    face_button = tk.Button(window, text="Select a face", command=select_face)
+    face_button.pack(side=tk.LEFT, padx=10, pady=10)
+
+    # Select a target button
+    target_button = tk.Button(window, text="Select a target", command=select_target)
+    target_button.pack(side=tk.RIGHT, padx=10, pady=10)
+
+    # FPS limit checkbox
+    limit_fps = tk.IntVar()
+    fps_checkbox = tk.Checkbutton(window, text="Limit FPS to 30", variable=limit_fps, command=toggle_fps_limit, font=("Arial", 8))
+    fps_checkbox.pack(side=tk.BOTTOM)
+    fps_checkbox.select()
+
+    # Start button
+    start_button = tk.Button(window, text="Start", bg="green", command=start)
+    start_button.pack(side=tk.BOTTOM, padx=10, pady=10)
+    window.mainloop()