diff --git a/main-windows.py b/main-windows.py
deleted file mode 100644
index 35b5780..0000000
--- a/main-windows.py
+++ /dev/null
@@ -1,622 +0,0 @@
-import os
-import sys
-import subprocess
-import signal
-
-from concurrent.futures import ThreadPoolExecutor, as_completed
-
-import argparse
-import time
-
-parser = argparse.ArgumentParser(add_help=False)
-
-parser.add_argument("-h", "--help", action="store_true", help="Show this help message and exit")
-parser.add_argument("-c", "--session-cookie", help="Session Cookie", required=False)
-parser.add_argument("-y", "--ykt-host", help="RainClassroom Host", required=False, default="pro.yuketang.cn")
-parser.add_argument("--video", action="store_true", help="Download Video")
-parser.add_argument("--ppt", action="store_true", help="Download PPT")
-parser.add_argument("--ppt-to-pdf", action="store_true", help="Convert PPT to PDF", default=True)
-parser.add_argument("--ppt-problem-answer", action="store_true", help="Store PPT Problem Answer", default=True)
-parser.add_argument("--course-name-filter", action="store", help="Filter Course Name", default=None)
-parser.add_argument("--lesson-name-filter", action="store", help="Filter Lesson Name", default=None)
-
-args = parser.parse_args()
-
-if args.help:
-    print("""RainClassroom Video Downloader
-
-requirements:
-    - Python >= 3.12
-    - requests
-    - websocket-client (qrcode login)
-    - qrcode (qrcode login)
-    - Pillow (Add answer to problem; Convert PPT to PDF)
-    
-required system binaries:
-    - aria2c (Download files multi-threaded & resume support)
-    - ffmpeg with nvenc support (Concatenate video segments and convert to HEVC)
-""")
-
-    print(parser.format_help())
-
-    exit()
-
-import requests
-import json
-
-# --- --- --- Section Init --- --- --- #
-# Login to RainClassroom
-userinfo = {}
-rainclassroom_sess = requests.session()
-
-YKT_HOST = args.ykt_host
-DOWNLOAD_FOLDER = "data"
-CACHE_FOLDER = "cache"
-
-os.makedirs(DOWNLOAD_FOLDER, exist_ok=True)
-os.makedirs(CACHE_FOLDER, exist_ok=True)
-
-
-def ask_for_input():
-    while True:
-        user_input = input("Do you want to continue/abort/skip_current? (y/n/s): ").lower()
-        if user_input == 'y':
-            print("Proceeding...")
-            return 0  # Don't skip
-        elif user_input == 'n':
-            print("Aborting the program.")
-            sys.exit()  # Exit the program if 'n' is chosen
-        elif user_input == 's':
-            print("Skipping current...")
-            return 1  # Set skip_flag to 1
-        else:
-            print("Invalid input, please enter 'y', 'n', or 's'.")
-
-
-def ask_for_allin():
-    while True:
-        confirmation = input(
-            "All in Means download everything at once.\n"
-            "This may take a long time and require over 100G of disk space.\n"
-            " Are you sure? (y/n): ").lower()
-        if confirmation == 'y':
-            print("All in! Ensure more than 100G disk space available in current directory!!!")
-            print("May take a looooooong time to finish!!!")
-            return 1  # Set allin_flag to 1
-        elif confirmation == 'n':
-            print("Cancelled 'All in' operation.")
-            return 0
-        else:
-            print("Invalid input, please enter 'y' or 'n'.")
-
-
-# --- --- --- Section Load Session --- --- --- #
-
-if args.session_cookie is not None:
-    rainclassroom_sess.cookies['sessionid'] = args.session_cookie
-
-# --- --- --- Section Login --- --- --- #
-else:
-    import websocket
-    import qrcode
-
-
-    def on_message(ws, message):
-        global userinfo
-        userinfo = json.loads(message)
-        if 'subscribe_status' in userinfo:
-            ws.close()
-            return
-
-        qr = qrcode.QRCode()
-        qr.add_data(userinfo["qrcode"])
-        # Flush screen first
-        print("\033c")
-        qr.print_ascii(out=sys.stdout)
-        print("请扫描二维码登录")
-
-
-    def on_error(ws, error):
-        print(error)
-
-
-    def on_open(ws):
-        ws.send(data=json.dumps({"op": "requestlogin", "role": "web", "version": 1.4, "type": "qrcode", "from": "web"}))
-
-
-    # websocket数据交互
-    ws = websocket.WebSocketApp(f"wss://{YKT_HOST}/wsapp/",
-                                on_message=on_message,
-                                on_error=on_error)
-    ws.on_open = on_open
-    ws.run_forever()
-
-    # 登录
-    req = rainclassroom_sess.get(f"https://{YKT_HOST}/v/course_meta/user_info")
-    rainclassroom_sess.post(f"https://{YKT_HOST}/pc/web_login",
-                            data=json.dumps({'UserID': userinfo['UserID'], 'Auth': userinfo['Auth']}))
-
-    # Store session
-    with open(f"{DOWNLOAD_FOLDER}/session.txt", "w") as f:
-        f.write(rainclassroom_sess.cookies['sessionid'])
-
-# --- --- --- Section Get Course List --- --- --- #
-
-# 获取自己的课程列表
-shown_courses = rainclassroom_sess.get(f"https://{YKT_HOST}/v2/api/web/courses/list?identity=2").json()
-
-hidden_courses = rainclassroom_sess.get(f"https://{YKT_HOST}/v2/api/web/classroom_archive").json()
-
-for course in hidden_courses['data']['classrooms']:
-    course['classroom_id'] = course['id']
-
-courses = shown_courses['data']['list'] + hidden_courses['data']['classrooms']
-
-if args.course_name_filter is not None:
-    courses = [c for c in courses if args.course_name_filter in c['name']]
-
-rainclassroom_sess.cookies['xtbz'] = 'ykt'
-
-
-# --- --- --- Section Get Lesson List --- --- --- #
-# {
-#     "university_name": "",
-#     "term": 202401,
-#     "university_logo_pic": "",
-#     "name": "NAME",
-#     "type_count": [],
-#     "students_count": 7,
-#     "color_system": 3,
-#     "course": {
-#         "update_time": "",
-#         "name": "",
-#         "admin_id": 0,
-#         "university_id": 0,
-#         "type": 0,
-#         "id": 0
-#     },
-#     "teacher": {
-#         "user_id": 0,
-#         "name": "",
-#         "avatar": ""
-#     },
-#     "create_time": "",
-#     "university_id": 0,
-#     "time": "",
-#     "course_id": 0,
-#     "university_logo": "0",
-#     "university_mini_logo": "0",
-#     "id": 0,
-#     "is_pro": true,
-#     "color_code": 0
-# }
-
-
-def get_lesson_list(course: dict, name_prefix: str = ""):
-    lesson_data = rainclassroom_sess.get(
-        f"https://{YKT_HOST}/v2/api/web/logs/learn/{course['classroom_id']}?actype=14&page=0&offset=500&sort=-1").json()
-
-    folder_name = f"{course['name']}-{course['teacher']['name']}"
-
-    # Rename old folder
-    if os.path.exists(f"{DOWNLOAD_FOLDER}/{course['name']}"):
-        os.rename(f"{DOWNLOAD_FOLDER}/{course['name']}", f"{DOWNLOAD_FOLDER}/{folder_name}")
-
-    if os.path.exists(f"{CACHE_FOLDER}/{course['name']}"):
-        os.rename(f"{CACHE_FOLDER}/{course['name']}", f"{CACHE_FOLDER}/{folder_name}")
-
-    os.makedirs(f"{DOWNLOAD_FOLDER}/{folder_name}", exist_ok=True)
-    os.makedirs(f"{CACHE_FOLDER}/{folder_name}", exist_ok=True)
-    name_prefix += folder_name + "/"
-
-    if args.lesson_name_filter is not None:
-        lesson_data['data']['activities'] = [l for l in lesson_data['data']['activities'] if
-                                             args.lesson_name_filter in l['title']]
-
-    length = len(lesson_data['data']['activities'])
-
-    if args.video:
-        for index, lesson in enumerate(lesson_data['data']['activities']):
-            # Lesson
-            try:
-                download_lesson_video(lesson, name_prefix + str(length - index))
-            except Exception as e:
-                print(e)
-                print(f"Failed to download video for {name_prefix} - {lesson['title']}", file=sys.stderr)
-
-    if args.ppt:
-        for index, lesson in enumerate(lesson_data['data']['activities']):
-            # Lesson
-            try:
-                download_lesson_ppt(lesson, name_prefix + str(length - index))
-            except Exception as e:
-                print(e)
-                print(f"Failed to download PPT for {name_prefix} - {lesson['title']}", file=sys.stderr)
-
-
-# --- --- --- Section Download Lesson Video --- --- --- #
-# {
-#      "type": 14,
-#      "id": 7153416,
-#      "courseware_id": "909642544544463488",
-#      "title": "R8-三相-周期非正弦",
-#      "create_time": 1686274642000,
-#      "attend_status": true,
-#      "is_finished": true
-# }
-
-
-def download_lesson_video(lesson: dict, name_prefix: str = ""):
-    lesson_video_data = rainclassroom_sess.get(
-        f"https://{YKT_HOST}/api/v3/lesson-summary/replay?lesson_id={lesson['courseware_id']}").json()
-    name_prefix += "-" + lesson['title']
-
-    if 'live' not in lesson_video_data['data']:
-        print(f"Skipping {name_prefix} - No Video", file=sys.stderr)
-        return
-
-    if os.path.exists(f"{DOWNLOAD_FOLDER}/{name_prefix}.mp4"):
-        print(f"Skipping {name_prefix} - Video already present")
-        time.sleep(0.5)
-        return
-
-    has_error = False
-
-    for order, segment in enumerate(lesson_video_data['data']['live']):
-
-        # Segment
-        try:
-            # download_segment(segment['url'], order, name_prefix)
-            download_segments_in_parallel(lesson_video_data, name_prefix)
-        except Exception as e:
-            print(e)
-            print(f"Failed to download {name_prefix} - {segment['order']}", file=sys.stderr)
-            has_error = True
-
-    if not has_error and len(lesson_video_data['data']['live']) > 0:
-        print(f"Concatenating {name_prefix}")
-
-        with open(f"{CACHE_FOLDER}/concat.txt", "w", encoding='utf-8') as f:
-            f.write("\n".join(
-                [f"file '{name_prefix}-{i}.mp4'" for i in range(len(lesson_video_data['data']['live']))]
-            ))
-
-        video_concatenating_command = (
-            f"ffmpeg -f concat -safe 0 -hwaccel cuda -hwaccel_output_format cuda -i {CACHE_FOLDER}/concat.txt"
-            f" -c:v hevc_nvenc -b:v 175k -maxrate 350k -bufsize 3200k -r 8 -rc-lookahead 58 "
-            f"-c:a aac -ac 1 -rematrix_maxval 1.0 -b:a 64k '{DOWNLOAD_FOLDER}/{name_prefix}.mp4' -n "
-            f"-hide_banner -loglevel warning -stats")
-
-        print(video_concatenating_command)
-        # os.system(cmd)
-
-        chcp_command = "chcp 65001"
-
-        video_concatenating_command_total = f"{chcp_command}; {video_concatenating_command}"
-
-        subprocess.run(['powershell', '-Command', video_concatenating_command_total], text=True)
-
-    if has_error:
-        with open(f"{DOWNLOAD_FOLDER}/error.log", "a") as f:
-            f.write(f"{name_prefix}\n")
-
-
-# --- --- --- Section Download Segment --- --- --- #
-# {
-#     "id": "743834725938342272",
-#     "code": "kszt_DdQU9sOod7o",
-#     "type": 2,
-#     "source": "th",
-#     "url": "https://kszt-playback.xuetangx.com/gifshow-xuetangx/73466bdb387702307504996781/f0.mp4?auth_key=1729778852-4128559473511008914-0-e0c959d1504f92ef5a5d45000f46330d",
-#     "start": 1666508813000,
-#     "end": 1666510612000,
-#     "duration": 1799000,
-#     "hiddenStatus": 0,
-#     "order": 0,
-#     "replayOssStatus": 0,
-#     "recordFileId": "",
-#     "recordType": "",
-#     "subtitlePath": ""
-# }
-
-
-def download_segment(url: str, order: int, name_prefix: str = ""):
-    print(f"Downloading {name_prefix} - {order}")
-
-    video_download_command = (f"aria2c -o '{CACHE_FOLDER}/{name_prefix}-{order}.mp4'"
-                              f" -x 4 -s 4 '{url}' -c -l aria2c_video.log --log-level warn")
-    result = subprocess.run(['powershell', '-Command', video_download_command], text=True)
-
-    return result
-
-    # ret = os.system(
-    #     f"aria2c -o '{CACHE_FOLDER}/{name_prefix}-{order}.mp4' -x 4 -s 4 '{url}' -c")
-    # if ret != 0:
-    #     raise Exception(f"Failed to download {name_prefix}-{order}")
-
-
-def download_segments_in_parallel(lesson_video_data, name_prefix):
-    has_error = False
-
-    # Create a ThreadPoolExecutor to manage parallel downloads
-    with ThreadPoolExecutor(max_workers=6) as executor:
-        # Dictionary to hold future results
-        future_to_order = {
-            executor.submit(download_segment, segment['url'], order, name_prefix): order
-            for order, segment in enumerate(lesson_video_data['data']['live'])
-        }
-
-        # Iterate over the completed futures
-        for future in as_completed(future_to_order):
-            order = future_to_order[future]
-            try:
-                future.result()  # Get the result (will raise exception if there was one)
-                print(f"Successfully downloaded {name_prefix} - {order}")
-            except Exception as e:
-                print(e)
-                print(f"Failed to download {name_prefix} - {order}", file=sys.stderr)
-                has_error = True
-
-    return has_error
-
-# --- --- --- Section Download Lesson PPT --- --- --- #
-# {
-#     "code": 0,
-#     "msg": "OK",
-#     "data": {
-#         "lesson": {
-#             "id": "1267751345493205504",
-#             "title": "计算机网络原理  课堂提问（2）",
-#             "startTime": 1728964537223,
-#             "endTime": 1728965834350,
-#             "teacherIdentityId": "15753469",
-#             "classroom": {
-#                 "id": "3134428",
-#                 "name": "2024秋-计算机网络原理-2",
-#                 "pro": true
-#             },
-#             "course": {
-#                 "id": "1360043",
-#                 "name": "计算机网络原理"
-#             }
-#         },
-#         "fileSharing": {
-#             "count": 0,
-#             "cover": null
-#         },
-#         "teacher": {
-#             "identityId": "15753469",
-#             "avatar": "0",
-#             "name": "徐明伟",
-#             "number": "1998990267"
-#         },
-#         "replayType": 0,
-#         "replayOssStatus": 0,
-#         "presentations": [
-#             {
-#                 "id": "1267751453966295552",
-#                 "title": "计算机网络原理  课堂提问",
-#                 "cover": "https://thu-private-qn.yuketang.cn/slide/11789532/cover435_20241015115349.jpg?e=1729790227&token=IAM-gs8ue1pDIGwtR1CR0Zjdagg7Q2tn5G_1BqTmhmqa:CkT5RMnhXFxcVUWoxVU2xxjA6ac=",
-#                 "slidesCount": 21,
-#                 "totalSlidesCount": 59,
-#                 "doubtCount": 0,
-#                 "collectCount": 0,
-#                 "conf": "{\"show_presentation\":\"film\",\"slides\":[\"1267751453966295553\",\"1267751453974684160\",\"1267751453974684162\",\"1267751453974684164\",\"1267751453983072768\",\"1267751453983072770\",\"1267751453983072772\",\"1267751453983072774\",\"1267751453991461376\",\"1267751453991461378\",\"1267751453991461379\",\"1267751453999849984\",\"1267751453999849985\",\"1267751453999849986\",\"1267751453999849987\",\"1267751454008238592\",\"1267751454008238593\",\"1267751454008238594\",\"1267751454008238595\",\"1267751454016627200\",\"1267751454016627201\"],\"hide_slides\":[]}"
-#             }
-#         ],
-#         "user": {
-#             "identityId": "21640720",
-#             "avatar": "http://qn-sx.yuketang.cn/tougao_pic_AFzVVZcN5p9.png",
-#             "name": "董业恺",
-#             "number": "2022010426"
-#         },
-#         "activityId": "7970721",
-#         "memoContent": "",
-#         "liveViewed": false,
-#         "doubtSlides": [],
-#         "collectSlides": [],
-#         "checkIn": {
-#             "lessonId": "1267751345493205504",
-#             "identityId": "21640720",
-#             "score": 1000,
-#             "source": 5,
-#             "time": 1728964549329,
-#             "valid": 1,
-#             "problemScore": 1000,
-#             "quizScore": -1,
-#             "duration": 0,
-#             "addScore": null,
-#             "redEnvelope": 0,
-#             "correctCount": 10,
-#             "incorrectCount": 4,
-#             "unMarkCount": 0
-#         },
-#         "quizzes": [],
-#         "danmuList": [],
-#         "tougaoList": [],
-#         "toastType": 0,
-#         "problems": [
-#             {
-#                 "problemId": "1267751453974684162",
-#                 "problemType": 1,
-#                 "problemScore": 100,
-#                 "index": 3,
-#                 "cover": "https://thu-private-qn.yuketang.cn/slide/11789532/cover433_20241015115349.jpg?e=1729790227&token=IAM-gs8ue1pDIGwtR1CR0Zjdagg7Q2tn5G_1BqTmhmqa:hLi2EEWUQHgVeKyP9y4bi7neaYQ=",
-#                 "presentationId": "1267751453966295552",
-#                 "answer": [
-#                     "D"
-#                 ],
-#                 "ans_type": "",
-#                 "comment": {},
-#                 "correctAnswer": [
-#                     "D"
-#                 ],
-#                 "score": 100,
-#                 "submitTime": 1728964586371,
-#                 "scoreTime": 0,
-#                 "correct": true,
-#                 "blankStatus": [],
-#                 "anonymous": null,
-#                 "remarkDetail": {},
-#                 "teamInfo": null
-#             }
-#         ]
-#     }
-# }
-
-
-def download_lesson_ppt(lesson: dict, name_prefix: str = ""):
-    lesson_data = rainclassroom_sess.get(
-        f"https://{YKT_HOST}/api/v3/lesson-summary/student?lesson_id={lesson['courseware_id']}").json()
-    name_prefix += "-" + lesson['title']
-
-    if 'presentations' not in lesson_data['data']:
-        print(f"Skipping {name_prefix} - No PPT", file=sys.stderr)
-        return
-
-    for index, ppt in enumerate(lesson_data['data']['presentations']):
-        # PPT
-        try:
-            download_ppt(lesson["courseware_id"], ppt['id'], name_prefix + f"-{index}")
-        except Exception as e:
-            print(e)
-            print(f"Failed to download PPT {name_prefix} - {ppt['title']}", file=sys.stderr)
-
-
-# --- --- --- Section Download PPT --- --- --- #
-# {
-#     "code": 0,
-#     "msg": "OK",
-#     "data": {
-#         "presentation": {
-#             "id": "714674183600571776",
-#             "title": "L1_课程介绍",
-#             "cover": "https://qn-st0.yuketang.cn/FudgWS2XoU3bXLxReeSBBhYTWJsX",
-#             "width": 720,
-#             "height": 540,
-#             "conf": {
-#                 "show_presentation": "all",
-#                 "slides": [
-#                     "714674183617348992"
-#                 ],
-#                 "hide_slides": []
-#             }
-#         },
-#         "slides": [
-#             {
-#                 "id": "714674183617348992",
-#                 "index": 1,
-#                 "doubtCount": 0,
-#                 "collectCount": 0,
-#                 "cover": "https://qn-st0.yuketang.cn/FudgWS2XoU3bXLxReeSBBhYTWJsX",
-#                 "problem": null,
-#                 "result": null
-#             }
-#         ]
-#     }
-# }
-
-
-def download_ppt(lesson_id: str, ppt_id: str, name_prefix: str = ""):
-    print(f"Downloading {name_prefix}")
-    ppt_raw_data = rainclassroom_sess.get(
-        f"https://{YKT_HOST}/api/v3/lesson-summary/student/presentation?presentation_id={ppt_id}&lesson_id={lesson_id}").json()
-    name_prefix += "-" + ppt_raw_data['data']['presentation']['title']
-
-    # If PDF is present, skip
-    if os.path.exists(f"{DOWNLOAD_FOLDER}/{name_prefix}.pdf"):
-        print(f"Skipping {name_prefix} - PDF already present")
-        time.sleep(0.5)
-        return
-
-    os.makedirs(f"{DOWNLOAD_FOLDER}/{name_prefix}", exist_ok=True)
-
-    images = []
-
-    with open(f"{CACHE_FOLDER}/ppt_download.txt", "w") as f:
-        for slide in ppt_raw_data['data']['slides']:
-            if not slide.get('cover'):
-                continue
-
-            f.write(f"{slide['cover']}\n out={DOWNLOAD_FOLDER}/{name_prefix}/{slide['index']}.jpg\n")
-            images.append(f"{DOWNLOAD_FOLDER}/{name_prefix}/{slide['index']}.jpg")
-
-        # if os.path.exists(f"{DOWNLOAD_FOLDER}/{name_prefix}/{slide['index']}.jpg"):
-        #     print(f"Skipping {name_prefix} - {slide['index']}")
-        #     continue
-        #
-        # with open(f"{DOWNLOAD_FOLDER}/{name_prefix}/{slide['index']}.jpg", "wb") as f:
-        #     f.write(requests.get(slide['cover']).content)
-
-    ppt_download_command = (f"aria2c -i {CACHE_FOLDER}/ppt_download.txt -x 16 -s 16 -c "
-                            f"-l aria2c_ppt.log --log-level warn")
-    # os.system(f"aria2c -i {CACHE_FOLDER}/ppt_download.txt -x 16 -s 16 -c")
-    subprocess.run(['powershell', '-Command', ppt_download_command], text=True)
-
-    from PIL import Image
-
-    if args.ppt_problem_answer:
-        from PIL import ImageDraw, ImageFont
-
-        for problem in ppt_raw_data['data']['slides']:
-            if problem['problem'] is None:
-                continue
-
-            if not problem.get('cover'):
-                continue
-
-            answer = "Answer: " + "; ".join(problem['problem']['content']['answer'])
-
-            image = Image.open(f"{DOWNLOAD_FOLDER}/{name_prefix}/{problem['index']}.jpg").convert("RGB")
-
-            draw = ImageDraw.Draw(image)
-
-            # Load the font
-            font = ImageFont.load_default(size=40)
-            text_bbox = draw.textbbox(xy=(20, 20), text=answer, font=font)
-
-            # Add semi-transparent black rectangle
-            draw.rectangle([text_bbox[0] - 10, text_bbox[1] - 10, text_bbox[2] + 10, text_bbox[3] + 10], fill="#bbb")
-
-            # Draw the text on top (white)
-            draw.text((text_bbox[0], text_bbox[1]), answer, anchor="lt", font=font, fill="#333")
-
-            image.save(f"{DOWNLOAD_FOLDER}/{name_prefix}/{problem['index']}-ans.jpg")
-
-            # Replace the image in the list
-            images[images.index(
-                f"{DOWNLOAD_FOLDER}/{name_prefix}/{problem['index']}.jpg")] = f"{DOWNLOAD_FOLDER}/{name_prefix}/{problem['index']}-ans.jpg"
-
-            print(f"Added Answer to {name_prefix} - {problem['index']}")
-
-    if not args.ppt_to_pdf:
-        return
-
-    print(f"Converting {name_prefix}")
-
-    images = [Image.open(i) for i in images]
-    images[0].save(f"{DOWNLOAD_FOLDER}/{name_prefix}.pdf", "PDF", resolution=100.0, save_all=True,
-                   append_images=images[1:])
-
-    print(f"Converted {name_prefix}")
-
-
-# --- --- --- Section Main --- --- --- #
-
-allin_flag = ask_for_allin()
-
-for course in courses:
-    skip_flag = 0
-    try:
-        print(course)
-        if not(allin_flag):
-            skip_flag = ask_for_input()
-            if (skip_flag):
-                continue
-            else:
-                get_lesson_list(course)
-        else:
-            get_lesson_list(course)
-    except Exception as e:
-        print(e)
-        print(f"Failed to parse {course['name']}", file=sys.stderr)
diff --git a/main_windows.py b/main_windows.py
new file mode 100644
index 0000000..e9a747c
--- /dev/null
+++ b/main_windows.py
@@ -0,0 +1,257 @@
+import os
+import sys
+import argparse
+import time
+
+parser = argparse.ArgumentParser(add_help=False)
+
+parser.add_argument("-h", "--help", action="store_true", help="Show this help message and exit")
+parser.add_argument("-c", "--session-cookie", help="Session Cookie", required=False)
+parser.add_argument("-y", "--ykt-host", help="RainClassroom Host", required=False, default="pro.yuketang.cn")
+parser.add_argument("--video", action="store_true", help="Download Video")
+parser.add_argument("--ppt", action="store_true", help="Download PPT")
+parser.add_argument("--ppt-to-pdf", action="store_true", help="Convert PPT to PDF", default=True)
+parser.add_argument("--ppt-problem-answer", action="store_true", help="Store PPT Problem Answer", default=True)
+parser.add_argument("--course-name-filter", action="store", help="Filter Course Name", default=None)
+parser.add_argument("--lesson-name-filter", action="store", help="Filter Lesson Name", default=None)
+
+# Check for no arguments and display help if none are given
+if len(sys.argv) == 1:
+    parser.print_help()
+    print('\nYOU SHALL RUN THIS EXECUTABLE FROM POWERSHELL WITH ARGUMENT!!')
+    print('YOU SHALL RUN THIS EXECUTABLE FROM POWERSHELL WITH ARGUMENT!!')
+    print('YOU SHALL RUN THIS EXECUTABLE FROM POWERSHELL WITH ARGUMENT!!')
+    sys.exit()
+
+args = parser.parse_args()
+
+# Check if no arguments are provided or only --help is provided
+if args.help or len(vars(args)) == 0:
+    print("""RainClassroom Video Downloader
+
+requirements:
+    - Python >= 3.12
+    - requests
+    - websocket-client (qrcode login)
+    - qrcode (qrcode login)
+    - Pillow (Add answer to problem; Convert PPT to PDF)
+
+required system binaries:
+    - aria2c (Download files multi-threaded & resume support)
+    - ffmpeg with nvenc support (Concatenate video segments and convert to HEVC)
+""")
+    print(parser.format_help())
+    exit()
+
+import requests
+import json
+
+# --- --- --- Section Init --- --- --- #
+# Login to RainClassroom
+userinfo = {}
+rainclassroom_sess = requests.session()
+
+YKT_HOST = args.ykt_host
+DOWNLOAD_FOLDER = "data"
+CACHE_FOLDER = "cache"
+
+os.makedirs(DOWNLOAD_FOLDER, exist_ok=True)
+os.makedirs(CACHE_FOLDER, exist_ok=True)
+
+
+# --- --- --- Section Load Session --- --- --- #
+
+if args.session_cookie is not None:
+    rainclassroom_sess.cookies['sessionid'] = args.session_cookie
+
+# --- --- --- Section Login --- --- --- #
+else:
+    import websocket
+    import qrcode
+
+    def on_message(ws, message):
+        global userinfo
+        userinfo = json.loads(message)
+        if 'subscribe_status' in userinfo:
+            ws.close()
+            return
+
+        qr = qrcode.QRCode()
+        qr.add_data(userinfo["qrcode"])
+        # Flush screen first
+        print("\033c")
+        qr.print_ascii(out=sys.stdout)
+        print("请扫描二维码登录")
+
+
+    def on_error(ws, error):
+        print(error)
+
+
+    def on_open(ws):
+        ws.send(data=json.dumps({"op": "requestlogin", "role": "web", "version": 1.4, "type": "qrcode", "from": "web"}))
+
+
+    # websocket数据交互
+    ws = websocket.WebSocketApp(f"wss://{YKT_HOST}/wsapp/",
+                                on_message=on_message,
+                                on_error=on_error)
+    ws.on_open = on_open
+    ws.run_forever()
+
+    # 登录
+    req = rainclassroom_sess.get(f"https://{YKT_HOST}/v/course_meta/user_info")
+    rainclassroom_sess.post(f"https://{YKT_HOST}/pc/web_login",
+                            data=json.dumps({'UserID': userinfo['UserID'], 'Auth': userinfo['Auth']}))
+
+    # Store session
+    with open(f"{DOWNLOAD_FOLDER}/session.txt", "w") as f:
+        f.write(rainclassroom_sess.cookies['sessionid'])
+
+# --- --- --- Section Get Course List --- --- --- #
+
+# 获取自己的课程列表
+shown_courses = rainclassroom_sess.get(f"https://{YKT_HOST}/v2/api/web/courses/list?identity=2").json()
+
+hidden_courses = rainclassroom_sess.get(f"https://{YKT_HOST}/v2/api/web/classroom_archive").json()
+
+for course in hidden_courses['data']['classrooms']:
+    course['classroom_id'] = course['id']
+
+courses = shown_courses['data']['list'] + hidden_courses['data']['classrooms']
+
+if args.course_name_filter is not None:
+    courses = [c for c in courses if args.course_name_filter in c['name']]
+
+rainclassroom_sess.cookies['xtbz'] = 'ykt'
+
+
+# --- --- --- Section Get Lesson List --- --- --- #
+
+
+def get_lesson_list(course: dict, name_prefix: str = ""):
+    lesson_data = rainclassroom_sess.get(
+        f"https://{YKT_HOST}/v2/api/web/logs/learn/{course['classroom_id']}?actype=14&page=0&offset=500&sort=-1").json()
+
+    folder_name = f"{course['name']}-{course['teacher']['name']}"
+
+    # Rename old folder
+    if os.path.exists(f"{DOWNLOAD_FOLDER}/{course['name']}"):
+        os.rename(f"{DOWNLOAD_FOLDER}/{course['name']}", f"{DOWNLOAD_FOLDER}/{folder_name}")
+
+    if os.path.exists(f"{CACHE_FOLDER}/{course['name']}"):
+        os.rename(f"{CACHE_FOLDER}/{course['name']}", f"{CACHE_FOLDER}/{folder_name}")
+
+    os.makedirs(f"{DOWNLOAD_FOLDER}/{folder_name}", exist_ok=True)
+    os.makedirs(f"{CACHE_FOLDER}/{folder_name}", exist_ok=True)
+    name_prefix += folder_name + "/"
+
+    if args.lesson_name_filter is not None:
+        lesson_data['data']['activities'] = [l for l in lesson_data['data']['activities'] if
+                                             args.lesson_name_filter in l['title']]
+
+    length = len(lesson_data['data']['activities'])
+
+    if args.video:
+        for index, lesson in enumerate(lesson_data['data']['activities']):
+            # Lesson
+            try:
+                download_lesson_video(lesson, name_prefix + str(length - index))
+            except Exception as e:
+                print(e)
+                print(f"Failed to download video for {name_prefix} - {lesson['title']}", file=sys.stderr)
+
+    if args.ppt:
+        for index, lesson in enumerate(lesson_data['data']['activities']):
+            # Lesson
+            try:
+                download_lesson_ppt(lesson, name_prefix + str(length - index))
+            except Exception as e:
+                print(e)
+                print(f"Failed to download PPT for {name_prefix} - {lesson['title']}", file=sys.stderr)
+
+
+# --- --- --- Section Download Lesson Video --- --- --- #
+
+from video_processing import download_segments_in_parallel, concatenate_segments
+
+
+def download_lesson_video(lesson: dict, name_prefix: str = ""):
+    lesson_video_data = rainclassroom_sess.get(
+        f"https://{YKT_HOST}/api/v3/lesson-summary/replay?lesson_id={lesson['courseware_id']}").json()
+    name_prefix += "-" + lesson['title']
+
+    if 'live' not in lesson_video_data['data']:
+        print(f"Skipping {name_prefix} - No Video", file=sys.stderr)
+        return
+
+    if os.path.exists(f"{DOWNLOAD_FOLDER}/{name_prefix}.mp4"):
+        print(f"Skipping {name_prefix} - Video already present")
+        time.sleep(0.5)
+        return
+
+    has_error = False
+
+    # Download segments in parallel
+    try:
+        download_segments_in_parallel(CACHE_FOLDER, lesson_video_data, name_prefix)
+    except Exception as e:
+        print(e)
+        print(f"Failed to download {name_prefix}", file=sys.stderr)
+        has_error = True
+
+    # Start concatenation if downloads were successful
+    if not has_error and len(lesson_video_data['data']['live']) > 0:
+        print(f"Concatenating {name_prefix}")
+        concatenate_segments(CACHE_FOLDER, DOWNLOAD_FOLDER, name_prefix, len(lesson_video_data['data']['live']))
+
+    if has_error:
+        with open(f"{DOWNLOAD_FOLDER}/error.log", "a") as f:
+            f.write(f"{name_prefix}\n")
+
+
+from ppt_processing import download_ppt
+
+
+def download_lesson_ppt(lesson: dict, name_prefix: str = ""):
+    lesson_data = rainclassroom_sess.get(
+        f"https://{YKT_HOST}/api/v3/lesson-summary/student?lesson_id={lesson['courseware_id']}").json()
+    name_prefix += "-" + lesson['title']
+
+    if 'presentations' not in lesson_data['data']:
+        print(f"Skipping {name_prefix} - No PPT", file=sys.stderr)
+        return
+
+    for index, ppt in enumerate(lesson_data['data']['presentations']):
+        # PPT
+        try:
+            ppt_raw_data = rainclassroom_sess.get(
+                f"https://{YKT_HOST}/api/v3/lesson-summary/student/presentation?presentation_id={ppt['id']}&lesson_id={lesson["courseware_id"]}").json()
+            download_ppt(args.ppt_problem_answer, args.ppt_to_pdf, CACHE_FOLDER, DOWNLOAD_FOLDER, YKT_HOST, ppt_raw_data, name_prefix + f"-{index}")
+        except Exception as e:
+            print(e)
+            print(f"Failed to download PPT {name_prefix} - {ppt['title']}", file=sys.stderr)
+
+
+# --- --- --- Section Main --- --- --- #
+
+
+import option as opt
+
+allin_flag = opt.ask_for_allin()
+
+for course in courses:
+    skip_flag = 0
+    try:
+        print(course)
+        if not allin_flag:
+            skip_flag = opt.ask_for_input()
+            if skip_flag:
+                continue
+            else:
+                get_lesson_list(course)
+        else:
+            get_lesson_list(course)
+    except Exception as e:
+        print(e)
+        print(f"Failed to parse {course['name']}", file=sys.stderr)
diff --git a/option.py b/option.py
new file mode 100644
index 0000000..45c078f
--- /dev/null
+++ b/option.py
@@ -0,0 +1,34 @@
+import sys
+
+
+def ask_for_input():
+    while True:
+        user_input = input("Do you want to continue/abort/skip_current? (y/n/s): ").lower()
+        if user_input == 'y':
+            print("Proceeding...")
+            return 0  # Don't skip
+        elif user_input == 'n':
+            print("Aborting the program.")
+            sys.exit()  # Exit the program if 'n' is chosen
+        elif user_input == 's':
+            print("Skipping current...")
+            return 1  # Set skip_flag to 1
+        else:
+            print("Invalid input, please enter 'y', 'n', or 's'.")
+
+
+def ask_for_allin():
+    while True:
+        confirmation = input(
+            "All in Means download everything at once.\n"
+            "This may take a long time and require over 100G of disk space.\n"
+            " Are you sure? (y/n): ").lower()
+        if confirmation == 'y':
+            print("All in! Ensure more than 100G disk space available in current directory!!!")
+            print("May take a looooooong time to finish!!!")
+            return 1  # Set allin_flag to 1
+        elif confirmation == 'n':
+            print("Cancelled 'All in' operation.")
+            return 0
+        else:
+            print("Invalid input, please enter 'y' or 'n'.")
\ No newline at end of file
diff --git a/ppt_processing.py b/ppt_processing.py
new file mode 100644
index 0000000..ab15529
--- /dev/null
+++ b/ppt_processing.py
@@ -0,0 +1,91 @@
+import os
+import time
+import subprocess
+
+CACHE_FOLDER = 'cache'
+DOWNLOAD_FOLDER = 'data'
+
+def download_ppt(arg_ans, arg_pdf, CACHE_FOLDER, DOWNLOAD_FOLDER, YKT_HOST, ppt_raw_data, name_prefix: str = ""):
+
+    print(f"Downloading {name_prefix}")
+    # ppt_raw_data = rainclassroom_sess.get(
+    #     f"https://{YKT_HOST}/api/v3/lesson-summary/student/presentation?presentation_id={ppt_id}&lesson_id={lesson_id}").json()
+
+    name_prefix += "-" + ppt_raw_data['data']['presentation']['title']
+
+    # If PDF is present, skip
+    if os.path.exists(f"{DOWNLOAD_FOLDER}/{name_prefix}.pdf"):
+        print(f"Skipping {name_prefix} - PDF already present")
+        time.sleep(0.5)
+        return
+
+    os.makedirs(f"{DOWNLOAD_FOLDER}/{name_prefix}", exist_ok=True)
+
+    images = []
+
+    with open(f"{CACHE_FOLDER}/ppt_download.txt", "w", encoding='utf-8') as f:
+        for slide in ppt_raw_data['data']['slides']:
+            if not slide.get('cover'):
+                continue
+
+            f.write(f"{slide['cover']}\n out={DOWNLOAD_FOLDER}/{name_prefix}/{slide['index']}.jpg\n")
+            images.append(f"{DOWNLOAD_FOLDER}/{name_prefix}/{slide['index']}.jpg")
+
+        # if os.path.exists(f"{DOWNLOAD_FOLDER}/{name_prefix}/{slide['index']}.jpg"):
+        #     print(f"Skipping {name_prefix} - {slide['index']}")
+        #     continue
+        #
+        # with open(f"{DOWNLOAD_FOLDER}/{name_prefix}/{slide['index']}.jpg", "wb") as f:
+        #     f.write(requests.get(slide['cover']).content)
+
+    ppt_download_command = (f"aria2c -i {CACHE_FOLDER}/ppt_download.txt -x 16 -s 16 -c "
+                            f"-l aria2c_ppt.log --log-level warn")
+    # os.system(f"aria2c -i {CACHE_FOLDER}/ppt_download.txt -x 16 -s 16 -c")
+    subprocess.run(['powershell', '-Command', ppt_download_command], text=True)
+
+    from PIL import Image
+
+    if arg_ans:
+        from PIL import ImageDraw, ImageFont
+
+        for problem in ppt_raw_data['data']['slides']:
+            if problem['problem'] is None:
+                continue
+
+            if not problem.get('cover'):
+                continue
+
+            answer = "Answer: " + "; ".join(problem['problem']['content']['answer'])
+
+            image = Image.open(f"{DOWNLOAD_FOLDER}/{name_prefix}/{problem['index']}.jpg").convert("RGB")
+
+            draw = ImageDraw.Draw(image)
+
+            # Load the font
+            font = ImageFont.load_default(size=40)
+            text_bbox = draw.textbbox(xy=(20, 20), text=answer, font=font)
+
+            # Add semi-transparent black rectangle
+            draw.rectangle([text_bbox[0] - 10, text_bbox[1] - 10, text_bbox[2] + 10, text_bbox[3] + 10], fill="#bbb")
+
+            # Draw the text on top (white)
+            draw.text((text_bbox[0], text_bbox[1]), answer, anchor="lt", font=font, fill="#333")
+
+            image.save(f"{DOWNLOAD_FOLDER}/{name_prefix}/{problem['index']}-ans.jpg")
+
+            # Replace the image in the list
+            images[images.index(
+                f"{DOWNLOAD_FOLDER}/{name_prefix}/{problem['index']}.jpg")] = f"{DOWNLOAD_FOLDER}/{name_prefix}/{problem['index']}-ans.jpg"
+
+            print(f"Added Answer to {name_prefix} - {problem['index']}")
+
+    if not arg_pdf:
+        return
+
+    print(f"Converting {name_prefix}")
+
+    images = [Image.open(i) for i in images]
+    images[0].save(f"{DOWNLOAD_FOLDER}/{name_prefix}.pdf", "PDF", resolution=100.0, save_all=True,
+                   append_images=images[1:])
+
+    print(f"Converted {name_prefix}")
\ No newline at end of file
diff --git a/scrap_example.txt b/scrap_example.txt
new file mode 100644
index 0000000..8597018
--- /dev/null
+++ b/scrap_example.txt
@@ -0,0 +1,204 @@
+# --- --- --- Section Get Lesson List --- --- --- #
+# {
+#     "university_name": "",
+#     "term": 202401,
+#     "university_logo_pic": "",
+#     "name": "NAME",
+#     "type_count": [],
+#     "students_count": 7,
+#     "color_system": 3,
+#     "course": {
+#         "update_time": "",
+#         "name": "",
+#         "admin_id": 0,
+#         "university_id": 0,
+#         "type": 0,
+#         "id": 0
+#     },
+#     "teacher": {
+#         "user_id": 0,
+#         "name": "",
+#         "avatar": ""
+#     },
+#     "create_time": "",
+#     "university_id": 0,
+#     "time": "",
+#     "course_id": 0,
+#     "university_logo": "0",
+#     "university_mini_logo": "0",
+#     "id": 0,
+#     "is_pro": true,
+#     "color_code": 0
+# }
+
+
+# --- --- --- Section Download Lesson Video --- --- --- #
+# {
+#      "type": 14,
+#      "id": 7153416,
+#      "courseware_id": "909642544544463488",
+#      "title": "R8-三相-周期非正弦",
+#      "create_time": 1686274642000,
+#      "attend_status": true,
+#      "is_finished": true
+# }
+
+
+# --- --- --- Section Download Segment --- --- --- #
+# {
+#     "id": "743834725938342272",
+#     "code": "kszt_DdQU9sOod7o",
+#     "type": 2,
+#     "source": "th",
+#     "url": "https://kszt-playback.xuetangx.com/gifshow-xuetangx/73466bdb387702307504996781/f0.mp4?auth_key=1729778852-4128559473511008914-0-e0c959d1504f92ef5a5d45000f46330d",
+#     "start": 1666508813000,
+#     "end": 1666510612000,
+#     "duration": 1799000,
+#     "hiddenStatus": 0,
+#     "order": 0,
+#     "replayOssStatus": 0,
+#     "recordFileId": "",
+#     "recordType": "",
+#     "subtitlePath": ""
+# }
+
+
+# --- --- --- Section Download Lesson PPT --- --- --- #
+# {
+#     "code": 0,
+#     "msg": "OK",
+#     "data": {
+#         "lesson": {
+#             "id": "1267751345493205504",
+#             "title": "计算机网络原理  课堂提问（2）",
+#             "startTime": 1728964537223,
+#             "endTime": 1728965834350,
+#             "teacherIdentityId": "15753469",
+#             "classroom": {
+#                 "id": "3134428",
+#                 "name": "2024秋-计算机网络原理-2",
+#                 "pro": true
+#             },
+#             "course": {
+#                 "id": "1360043",
+#                 "name": "计算机网络原理"
+#             }
+#         },
+#         "fileSharing": {
+#             "count": 0,
+#             "cover": null
+#         },
+#         "teacher": {
+#             "identityId": "15753469",
+#             "avatar": "0",
+#             "name": "徐明伟",
+#             "number": "1998990267"
+#         },
+#         "replayType": 0,
+#         "replayOssStatus": 0,
+#         "presentations": [
+#             {
+#                 "id": "1267751453966295552",
+#                 "title": "计算机网络原理  课堂提问",
+#                 "cover": "https://thu-private-qn.yuketang.cn/slide/11789532/cover435_20241015115349.jpg?e=1729790227&token=IAM-gs8ue1pDIGwtR1CR0Zjdagg7Q2tn5G_1BqTmhmqa:CkT5RMnhXFxcVUWoxVU2xxjA6ac=",
+#                 "slidesCount": 21,
+#                 "totalSlidesCount": 59,
+#                 "doubtCount": 0,
+#                 "collectCount": 0,
+#                 "conf": "{\"show_presentation\":\"film\",\"slides\":[\"1267751453966295553\",\"1267751453974684160\",\"1267751453974684162\",\"1267751453974684164\",\"1267751453983072768\",\"1267751453983072770\",\"1267751453983072772\",\"1267751453983072774\",\"1267751453991461376\",\"1267751453991461378\",\"1267751453991461379\",\"1267751453999849984\",\"1267751453999849985\",\"1267751453999849986\",\"1267751453999849987\",\"1267751454008238592\",\"1267751454008238593\",\"1267751454008238594\",\"1267751454008238595\",\"1267751454016627200\",\"1267751454016627201\"],\"hide_slides\":[]}"
+#             }
+#         ],
+#         "user": {
+#             "identityId": "21640720",
+#             "avatar": "http://qn-sx.yuketang.cn/tougao_pic_AFzVVZcN5p9.png",
+#             "name": "董业恺",
+#             "number": "2022010426"
+#         },
+#         "activityId": "7970721",
+#         "memoContent": "",
+#         "liveViewed": false,
+#         "doubtSlides": [],
+#         "collectSlides": [],
+#         "checkIn": {
+#             "lessonId": "1267751345493205504",
+#             "identityId": "21640720",
+#             "score": 1000,
+#             "source": 5,
+#             "time": 1728964549329,
+#             "valid": 1,
+#             "problemScore": 1000,
+#             "quizScore": -1,
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+#             "addScore": null,
+#             "redEnvelope": 0,
+#             "correctCount": 10,
+#             "incorrectCount": 4,
+#             "unMarkCount": 0
+#         },
+#         "quizzes": [],
+#         "danmuList": [],
+#         "tougaoList": [],
+#         "toastType": 0,
+#         "problems": [
+#             {
+#                 "problemId": "1267751453974684162",
+#                 "problemType": 1,
+#                 "problemScore": 100,
+#                 "index": 3,
+#                 "cover": "https://thu-private-qn.yuketang.cn/slide/11789532/cover433_20241015115349.jpg?e=1729790227&token=IAM-gs8ue1pDIGwtR1CR0Zjdagg7Q2tn5G_1BqTmhmqa:hLi2EEWUQHgVeKyP9y4bi7neaYQ=",
+#                 "presentationId": "1267751453966295552",
+#                 "answer": [
+#                     "D"
+#                 ],
+#                 "ans_type": "",
+#                 "comment": {},
+#                 "correctAnswer": [
+#                     "D"
+#                 ],
+#                 "score": 100,
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+#                 "correct": true,
+#                 "blankStatus": [],
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+#                 "remarkDetail": {},
+#                 "teamInfo": null
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+#         ]
+#     }
+# }
+
+
+# --- --- --- Section Download PPT --- --- --- #
+# {
+#     "code": 0,
+#     "msg": "OK",
+#     "data": {
+#         "presentation": {
+#             "id": "714674183600571776",
+#             "title": "L1_课程介绍",
+#             "cover": "https://qn-st0.yuketang.cn/FudgWS2XoU3bXLxReeSBBhYTWJsX",
+#             "width": 720,
+#             "height": 540,
+#             "conf": {
+#                 "show_presentation": "all",
+#                 "slides": [
+#                     "714674183617348992"
+#                 ],
+#                 "hide_slides": []
+#             }
+#         },
+#         "slides": [
+#             {
+#                 "id": "714674183617348992",
+#                 "index": 1,
+#                 "doubtCount": 0,
+#                 "collectCount": 0,
+#                 "cover": "https://qn-st0.yuketang.cn/FudgWS2XoU3bXLxReeSBBhYTWJsX",
+#                 "problem": null,
+#                 "result": null
+#             }
+#         ]
+#     }
+# }
+
diff --git a/video_processing.py b/video_processing.py
new file mode 100644
index 0000000..7b7da77
--- /dev/null
+++ b/video_processing.py
@@ -0,0 +1,55 @@
+from concurrent.futures import ThreadPoolExecutor, as_completed
+import subprocess,sys
+
+
+def download_segment(CACHE_FOLDER, url: str, order: int, name_prefix: str = "" ):
+
+    print(f"Downloading {name_prefix} - {order}")
+
+    video_download_command = (f"aria2c -o '{CACHE_FOLDER}/{name_prefix}-{order}.mp4'"
+                              f" -x 16 -s 16 '{url}' -c -l aria2c_video.log --log-level warn")
+    result = subprocess.run(['powershell', '-Command', video_download_command], text=True)
+
+    return result
+
+
+def download_segments_in_parallel(CACHE_FOLDER, lesson_video_data, name_prefix):
+    has_error = False
+
+    # Create a ThreadPoolExecutor to manage parallel downloads
+    with ThreadPoolExecutor(max_workers=6) as executor:
+        # Dictionary to hold future results
+        future_to_order = {
+            executor.submit(download_segment,CACHE_FOLDER, segment['url'], order, name_prefix): order
+            for order, segment in enumerate(lesson_video_data['data']['live'])
+        }
+
+        # Iterate over the completed futures
+        for future in as_completed(future_to_order):
+            order = future_to_order[future]
+            try:
+                future.result()  # Get the result (will raise exception if there was one)
+                print(f"Successfully downloaded {name_prefix} - {order}")
+            except Exception as e:
+                print(e)
+                print(f"Failed to download {name_prefix} - {order}", file=sys.stderr)
+                has_error = True
+
+    return has_error
+
+
+def concatenate_segments(CACHE_FOLDER, DOWNLOAD_FOLDER, name_prefix, num_segments):
+
+    with open(f"{CACHE_FOLDER}/concat.txt", "w", encoding='utf-8') as f:
+        f.write("\n".join(
+            [f"file '../{CACHE_FOLDER}/{name_prefix}-{i}.mp4'" for i in range(num_segments)]
+        ))
+
+    video_concatenating_command = (
+        f"ffmpeg -f concat -safe 0 -hwaccel cuda -hwaccel_output_format cuda "
+        f"-i '{CACHE_FOLDER}/concat.txt' "
+        f"-c:v hevc_nvenc -b:v 175k -maxrate 350k -bufsize 12800k -r 6 -rc-lookahead 63 "
+        f"-c:a aac -ac 1 -rematrix_maxval 1.0 -b:a 64k '{DOWNLOAD_FOLDER}/{name_prefix}.mp4' -n "
+        f"-hide_banner -loglevel warning -stats")
+
+    subprocess.run(['powershell', '-Command', video_concatenating_command], text=True)
\ No newline at end of file