实操丨完美体育·（中国）手机网页版MYD-YT507H开发板基于Fluter+Django+OpenCV的行车记录仪
| 文章来源： 发布日期：2022.9.30 浏览次数：11704 次 |
此次的板卡测试，是完美体育·（中国）手机网页版MYD-YT507H开发板的行车记录仪测试体验。
之前分享的文章中，在完美体育·（中国）手机网页版MYD-YT507H开发板上进行了摄像头流媒体的尝试，在此基础上，进一步对之前的评测计划进行了实现。
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行车记录仪业务逻辑规划 -
硬件设备准备 -
摄像头信息记录和实时画面播放服务开发 -
摄像头视频信息记录 -
摄像头服务的完整代码 -
历史数据RestFul服务开发 -
Flutter Web界面开发 -
整体运行效果 -
车试 -
实际代码使用 -
感谢 -
总结
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记录服务：用于记录摄像头拍摄的视频信息，以及提供摄像头当前画面的实时播放服务 -
Django服务：包括RestFul提供API接口获取历史数据信息，以及为Flutter的Web界面提供访问服务 -
Flutter Web界面，用于实时画面播放、历史记录播放的界面
为了又快又好的开发行车记录仪的实际界面，以及后续进行各移动平台的App开发，选择了Flutter。事实证明，坑太多了。不过，跨平台特性，确实好。
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主控板：完美体育·（中国）手机网页版MYD-YT507H开发板 -
摄像头：海康威视DS-E11 720P USB摄像头 -
存储卡：闪迪32GB高速MicroSD存储卡 -
路由器：云来宝盒无线路由器
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能够采集摄像头的数据 -
能够提供实时视频查看 -
能够按时间写入视频数据到文件，自动进行分割
# http服务器请求处理：网页、MJPEG数据流class CamHandler(BaseHTTPRequestHandler):def do_GET(self):# mjpeg推流if self.path.endswith('.mjpg'):self.send_response(200)self.send_header('Content-type','multipart/x-mixed-replace; boundary=--jpgboundary')self.end_headers()while True:if is_stop:breaktry:# rc,img = cameraCapture.read()rc,img = success,frameif not rc:continueif True:imgRGB=cv2.cvtColor(img,cv2.COLOR_BGR2RGB)jpg = Image.fromarray(imgRGB)tmpFile = BytesIO()jpg.save(tmpFile,'JPEG')self.wfile.write(b"--jpgboundary")self.send_header(b'Content-type','image/jpeg')self.send_header(b'Content-length',str(tmpFile.getbuffer().nbytes))self.end_headers()jpg.save(self.wfile,'JPEG')else:img_fps = JPEG_QUALITY_VALUEimg_param = [int(cv2.IMWRITE_JPEG_QUALITY), img_fps]img_str = cv2.imencode('.jpg', img, img_param)[1].tobytes() # change image to jpeg formatself.send_header('Content-type','image/jpeg')self.end_headers()self.wfile.write(img_str)self.wfile.write(b"--jpgboundary") # end of this parttime.sleep(0.033)except KeyboardInterrupt:self.wfile.write(b"--jpgboundary--")breakexcept BrokenPipeError:continuereturn# 网页if self.path == '/' or self.path.endswith('.html'):self.send_response(200)self.send_header('Content-type','text/html')self.end_headers()self.wfile.write(b'完美体育·（中国）手机网页版 ')self.wfile.write(('' % self.headers.get('Host')).encode())
self.wfile.write(b'')return
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如果通过浏览器访问http://ip:端口/index.html，就会返回包含MJPEG调用地址的网页 -
如果通过浏览器访问http://ip:端口/live.mjpg，就会返回MJPEG流媒体数据，以便播放
# websocket服务请求处理async def CamTransmitHandler(websocket, path):print("Client Connected !")try :while True:# rc,img = cameraCapture.read()rc,img = success,frameif not rc:continueimg_fps = JPEG_QUALITY_VALUEimg_param = [int(cv2.IMWRITE_JPEG_QUALITY), img_fps]encoded = cv2.imencode('.jpg', img, img_param)[1]data = str(base64.b64encode(encoded))data = data[2:len(data)-1]await websocket.send(data)# cv2.imshow("Transimission", frame)# if cv2.waitKey(1) & 0xFF == ord('q'):# break# cap.release()except EXCEPTION_CONNECTION_CLOSE as e:print("Client Disconnected !")# cap.release()except:print("Someting went Wrong !")
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初始化opencv，开始摄像头数据帧的获取 -
检测是否达到预定时间 -
未达到时间，则继续写入当前视频 -
达到时间了，则关闭当前视频，写入缩略图，并开启新的文件写入
cameraCapture = cv2.VideoCapture(CAMERA_NO)cameraCapture.set(cv2.CAP_PROP_FRAME_WIDTH, 320)cameraCapture.set(cv2.CAP_PROP_FRAME_WIDTH, 240)cameraCapture.set(cv2.CAP_PROP_SATURATION, 135)fps = 30size=(int(cameraCapture.get(cv2.CAP_PROP_FRAME_WIDTH)),int(cameraCapture.get(cv2.CAP_PROP_FRAME_HEIGHT)))success,frame = cameraCapture.read()
．．．
while True:if is_stop:success = Falsebreak;success,frame = cameraCapture.read()if not success:continuetime_now = get_current_time()if time_now["time"] - time_record["time"] >= ROTATE_TIME:if time_record_prev:thubm_file = get_file_name(time_record_prev, 'thumbs', 'jpg')print("[Info] write to thumb: %s" % thubm_file)if not os.path.isfile(thubm_file):cv2.imwrite(thubm_file, frame)time_record = time_nowtime_record_prev = get_current_time()video_file = get_file_name(time_record_prev, 'videos', MEDIA_EXT)print("[Info] write to video: %s" % video_file)# encode = cv2.VideoWriter_fourcc(*"mp4v")encode = cv2.VideoWriter_fourcc(*'X264')# encode = cv2.VideoWriter_fourcc(*'AVC1')# encode = cv2.VideoWriter_fourcc(*'XVID')# encode = cv2.VideoWriter_fourcc(*'H264')videoWriter=cv2.VideoWriter(video_file, encode,fps,size) # mp4numFrameRemaining = ROTATE_TIME * fps #摄像头捕获持续时间while success and numFrameRemaining > 0:videoWriter.write(frame)success,frame = cameraCapture.read()numFrameRemaining -= 1cameraCapture.release()
encode = cv2.VideoWriter_fourcc(*'X264')，在不同的环境下面，提供的编码方式不完全相同。# -*- coding: utf-8 -*-import signalimport cv2import timefrom PIL import Imagefrom threading import Threadfrom http.server import BaseHTTPRequestHandler,HTTPServerfrom socketserver import ThreadingMixInfrom io import BytesIOimport osimport sysimport websocketsimport asyncioimport base64import ctypesimport inspectCAMERA_NO = 2ROTATE_TIME = 120MJPEG_ENABLE = 1WEBSOCKET_ENABLE = 1MJPEG_SERVER_PORT = 28888WEBSOCKET_PORT = 28889JPEG_QUALITY_VALUE = 65STORE_DIR = "./data/" if os.uname()[0] == 'Darwin' else "/sdcard/data/"MEDIA_EXT = "mkv"EXCEPTION_CONNECTION_CLOSE = websockets.exceptions.ConnectionClosed if sys.version[:3] == '3.6' else websockets.ConnectionCloseddef _async_raise(tid, exctype):"""raises the exception, performs cleanup if needed"""try:tid = ctypes.c_long(tid)if not inspect.isclass(exctype):exctype = type(exctype)res = ctypes.pythonapi.PyThreadState_SetAsyncExc(tid, ctypes.py_object(exctype))if res == 0:# passraise ValueError("invalid thread id")elif res != 1:# """if it returns a number greater than one, you're in trouble,# and you should call it again with exc=NULL to revert the effect"""ctypes.pythonapi.PyThreadState_SetAsyncExc(tid, None)raise SystemError("PyThreadState_SetAsyncExc failed")except Exception as err:print(err)def stop_thread(thread):"""终止线程"""_async_raise(thread.ident, SystemExit)# 信号处理回调def signal_handler(signum, frame):# global cameraCapture# global thread# global server# global is_stop# global successprint('signal_handler: caught signal ' + str(signum))if signum == signal.SIGINT.value:print('stop server:')is_stop = Truesuccess = Falseprint("mjpeg server.socket.close...")server.socket.close()print("mjpeg server.shutdown...")server.shutdown()print("ws server.socket.close...")server_ws.ws_server.close()time.sleep(1)# print("ws server.shutdown...")# await server_ws.ws_server.wait_closed()print("mjpeg thread.shutdown...")thread_mjpeg.join()print("ws loop.shutdown...")# event_loop_ws.stop()event_loop_ws.call_soon_threadsafe(event_loop_ws.stop)time.sleep(1)# print("ws thread.shutdown...")# stop_thread(thread_ws)# time.sleep(1)# print(server)# print(server_ws)print(thread_mjpeg.is_alive())print(thread_ws.is_alive())print(event_loop_ws.is_running())# thread_ws.join()print("cameraCapture.release...")cameraCapture.release()print("quit...")# print(server_ws)sys.exit(0)# http服务器请求处理：网页、MJPEG数据流class CamHandler(BaseHTTPRequestHandler):def do_GET(self):# mjpeg推流if self.path.endswith('.mjpg'):self.send_response(200)self.send_header('Content-type','multipart/x-mixed-replace; boundary=--jpgboundary')self.end_headers()while True:if is_stop:breaktry:# rc,img = cameraCapture.read()rc,img = success,frameif not rc:continueif True:imgRGB=cv2.cvtColor(img,cv2.COLOR_BGR2RGB)jpg = Image.fromarray(imgRGB)tmpFile = BytesIO()jpg.save(tmpFile,'JPEG')self.wfile.write(b"--jpgboundary")self.send_header(b'Content-type','image/jpeg')self.send_header(b'Content-length',str(tmpFile.getbuffer().nbytes))self.end_headers()jpg.save(self.wfile,'JPEG')else:img_fps = JPEG_QUALITY_VALUEimg_param = [int(cv2.IMWRITE_JPEG_QUALITY), img_fps]img_str = cv2.imencode('.jpg', img, img_param)[1].tobytes() # change image to jpeg formatself.send_header('Content-type','image/jpeg')self.end_headers()self.wfile.write(img_str)self.wfile.write(b"--jpgboundary") # end of this parttime.sleep(0.033)except KeyboardInterrupt:self.wfile.write(b"--jpgboundary--")breakexcept BrokenPipeError:continuereturn# 网页if self.path == '/' or self.path.endswith('.html'):self.send_response(200)self.send_header('Content-type','text/html')self.end_headers()self.wfile.write(b'完美体育·（中国）手机网页版 ')self.wfile.write(('self.wfile.write(b'')returnclass ThreadedHTTPServer(ThreadingMixIn, HTTPServer):"""Handle requests in a separate thread."""# 启动MJPEG服务def mjpeg_server_star():global successglobal serverglobal thread_mjpegtry:server = ThreadedHTTPServer(('0.0.0.0', MJPEG_SERVER_PORT), CamHandler)print("mjpeg server started: http://0.0.0.0:%d" % MJPEG_SERVER_PORT)# server.serve_forever()thread_mjpeg = Thread(target=server.serve_forever);thread_mjpeg.start()except KeyboardInterrupt:print("mjpeg server stoping...")server.socket.close()server.shutdown()print("mjpeg server stoped")# websocket服务请求处理async def CamTransmitHandler(websocket, path):print("Client Connected !")try :while True:# rc,img = cameraCapture.read()rc,img = success,frameif not rc:continueimg_fps = JPEG_QUALITY_VALUEimg_param = [int(cv2.IMWRITE_JPEG_QUALITY), img_fps]encoded = cv2.imencode('.jpg', img, img_param)[1]data = str(base64.b64encode(encoded))data = data[2:len(data)-1]await websocket.send(data)# cv2.imshow("Transimission", frame)# if cv2.waitKey(1) & 0xFF == ord('q'):# break# cap.release()except EXCEPTION_CONNECTION_CLOSE as e:print("Client Disconnected !")# cap.release()except:print("Someting went Wrong !")# websocket服务器启动def websocket_server_start():global thread_wsglobal server_wsglobal event_loop_wsevent_loop_ws = asyncio.new_event_loop()def run_server():global server_wsprint("websocket server started: ws://0.0.0.0:%d" % WEBSOCKET_PORT)server_ws = websockets.serve(CamTransmitHandler, port=WEBSOCKET_PORT, loop=event_loop_ws)event_loop_ws.run_until_complete(server_ws)event_loop_ws.run_forever()thread_ws = Thread(target=run_server)thread_ws.start()# try:# yield# except e:# print("An exception occurred")# finally:# event_loop.call_soon_threadsafe(event_loop.stop)# 获取存储的文件名def get_file_name(time_obj, path, ext):file_name_time = "%04d-%02d-%02d_%02d-%02d-%02d" % (time_obj["year"], time_obj["month"], time_obj["day"], time_obj["hour"], time_obj["min"], 0)return '%s/%s/%s.%s' % (STORE_DIR, path, file_name_time, ext)# 获取当前整分时间def get_current_time():time_now = time.localtime()time_int = int(time.time())return {"year": time_now.tm_year,"month": time_now.tm_mon,"day": time_now.tm_mday,"hour": time_now.tm_hour,"min": time_now.tm_min,"sec": time_now.tm_sec,"time": time_int - time_now.tm_sec}# 设置信号回调signal.signal(signal.SIGINT, signal_handler)signal.signal(signal.SIGTERM, signal_handler)# 捕获摄像头cameraCapture = cv2.VideoCapture(CAMERA_NO)# 摄像头参数设置cameraCapture.set(cv2.CAP_PROP_FRAME_WIDTH, 320)cameraCapture.set(cv2.CAP_PROP_FRAME_WIDTH, 240)cameraCapture.set(cv2.CAP_PROP_SATURATION, 135)fps = 30size=(int(cameraCapture.get(cv2.CAP_PROP_FRAME_WIDTH)),int(cameraCapture.get(cv2.CAP_PROP_FRAME_HEIGHT)))# 读取捕获的数据success,frame = cameraCapture.read()if not success:print("camera start failed.")quit()is_stop = Falseserver = Noneserver_ws = Noneevent_loop_ws = Nonethread_mjpeg = Nonethread_ws = Nonemjpeg_server_star()websocket_server_start()print("record server star:")thubm_file = Nonevideo_file = Nonetime_start = int(time.time())time_record = {"time":0}time_record_prev = Nonewhile True:if is_stop:success = Falsebreak;success,frame = cameraCapture.read()if not success:continuetime_now = get_current_time()if time_now["time"] - time_record["time"] >= ROTATE_TIME:if time_record_prev:thubm_file = get_file_name(time_record_prev, 'thumbs', 'jpg')print("[Info] write to thumb: %s" % thubm_file)if not os.path.isfile(thubm_file):cv2.imwrite(thubm_file, frame)time_record = time_nowtime_record_prev = get_current_time()video_file = get_file_name(time_record_prev, 'videos', MEDIA_EXT)print("[Info] write to video: %s" % video_file)# encode = cv2.VideoWriter_fourcc(*"mp4v")encode = cv2.VideoWriter_fourcc(*'X264')# encode = cv2.VideoWriter_fourcc(*'AVC1')# encode = cv2.VideoWriter_fourcc(*'XVID')# encode = cv2.VideoWriter_fourcc(*'H264')videoWriter=cv2.VideoWriter(video_file, encode,fps,size) # mp4numFrameRemaining = ROTATE_TIME * fps #摄像头捕获持续时间while success and numFrameRemaining > 0:videoWriter.write(frame)success,frame = cameraCapture.read()numFrameRemaining -= 1cameraCapture.release()
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提供api接口，以便获取历史数据记录列表，便于前端界面呈现展示 -
提供Flutter Web界面代码文件的托管，以便通过浏览器访问 -
提供静态文件的访问，例如查看历史视频文件
STATIC_URL = 'static/'STATICFILES_DIRS = [BASE_DIR / "static"]
# 媒体文件存放目录，以及缩略图和视频文件的后缀THUMB_HOME_DIR = "%s/%s/data/thumbs/" % (BASE_DIR, STATIC_URL)VIDEO_HOME_DIR = "%s/%s/data/videos/" % (BASE_DIR, STATIC_URL)IMG_FILTER = [".jpg"]MEDIA_FILTER = [ ".mkv"]import jsonfrom django.shortcuts import render, HttpResponsefrom rest_framework.response import Responsefrom rest_framework.permissions import AllowAnyfrom rest_framework.decorators import api_view, permission_classesimport osfrom django.conf import settingsTHUMB_HOME_DIR = settings.THUMB_HOME_DIRVIDEO_HOME_DIR = settings.VIDEO_HOME_DIRIMG_FILTER = settings.IMG_FILTERMEDIA_FILTER = settings.MEDIA_FILTER# Create your views here.def hello_django(request):str = '''[{"id": 1,"time": "2022-07-28 21:00","title": "2022-07-28 21:00","body": "videos/2022-07-28_2100.mp4"},{"id": 2,"time": "2022-07-28 23:00","title": "2022-07-28 23:00","body": "videos/2022-07-28_2300.mp4"},{"id": 3,"time": "2022-07-28 25:00","title": "2022-07-28 25:00","body": "videos/2022-07-28_2500.mp4"}]'''_json = json.loads(str)return HttpResponse(json.dumps(_json), content_type='application/json')def history_list(request):next = request.GET.get("next", '')print(f"thumb next = {next}")path = "/".join(request.path.split("/")[3:])print(f"thumb request.path= {request.path}")print(f"thumb path = {path}")#print os.listdir(FILE_HOME_DIR+".none/")data = {"files":[], "dirs":[]}print(data)child_path = THUMB_HOME_DIR+nextprint(f"child_path = {child_path}")data['cur_dir'] = path+nextprint(data)for dir in os.listdir(child_path):if os.path.isfile(child_path+"/"+dir):if os.path.splitext(dir)[1] in IMG_FILTER:data['files'].append(dir)else:data['dirs'].append(dir)print(data)data['files']=sorted(data['files'])data['files'].reverse()data['infos'] = []for i in range(0,len(data['files'])):thumb_name = data['files'][i]video_name = thumb_name.replace('.jpg', MEDIA_FILTER[0])file_time = thumb_name.replace('.jpg', '').replace('_', ' ')data['infos'].append({"id": i,"time": file_time,"title": file_time,"body": thumb_name,'thumb': thumb_name,'video': video_name})return Response(data['infos'], status = 200)
hello_django是最开始学习使用的，返回写死的json数据。history_list，则是自动遍历缩略图文件夹，获取缩略图文件信息，并生成所需要的json数据格式。下载代码，进入manage.py所在的目录后，执行下面的命令即可启动：
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globals.dart：全局变量定义 -
main.dart：程序入口 -
home_page.dart：完美体育·（中国）手机网页版 -
live_page.dart：实时播放 -
live_page_mp4.dart：测试播放mp4视频 -
history_page.dart：历史记录列表页面 -
video_detail.dart：单条历史记录详情 -
video_play.dart：播放具体的历史视频 -
video_model.dart：单条记录的数据模型 -
http_service.dart：请求RestFul接口 -
websocket.dart：实时视频的WebSocket请求
Scaffold来模拟手机/Pad的操作界面，具体界面如下：
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实时画面：
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历史记录列表：
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历史记录播放： 
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DrivingRecorder：摄像头服务 -
backend：RestFul服务 -
frontend：Flutter Web界面
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janakj/py-mjpeg: Python MJPEG streaming utilities (github.com) -
Simple Python Motion Jpeg (mjpeg server) from webcam. Using: OpenCV,BaseHTTPServer (github.com) -
Python 使用USB Camera录制MP4视频_Frank_Abagnale的博客-CSDN博客 -
用 Python、nginx 搭建在线家庭影院 - 知乎 (zhihu.com) -
Django报错解决：RuntimeError: Model class ...apps... doesn't declare an explicit app_label and isn't in a_lyp039078的博客-CSDN博客 -
Python OpenCV 调用摄像头并截图保存_Clannad_niu的博客-CSDN博客 -
用 Python、nginx 搭建在线家庭影院mob604756e97f09的技术博客51CTO博客 -
Python-OpenCV录制H264编码的MP4视频 - 掘金 (juejin.cn) -
****[VideoWriter]保存H264/MPEG4格式MP4视频 - image processing (zj-image-processing.readthedocs.io) -
Manual USB camera settings in Linux | KUROKESU -
UVC Web Cameras (indilib.org) -
编写你的第一个 Flutter 网页应用 - Flutter 中文文档 - Flutter 中文开发者网站 - Flutter -
macOS install | Flutter -
[Django 設定 LANGUAGE_CODE 時所遇到的麻煩] OSError: No translation files found for default language zh-TW. (github.com)** -
Django And Flutter — 样板应用程序|的分步教程作者：Clever Tech Memes |中等 (medium.com) -
joke2k/django-environ: Django-environ allows you to utilize 12factor inspired environment variables to configure your Django application. (github.com) -
django 之跨域访问问题解决 access-control-allow-origin - 腾讯云开发者社区-腾讯云 (tencent.com) -
django-cors-headers · PyPI -
Django项目解决跨域问题 - SegmentFault 思否 -
video_player | Flutter Package (pub.dev) -
视频的播放和暂停 - Flutter 中文文档 - Flutter 中文开发者网站 - Flutter -
5.7 页面骨架（Scaffold） | 《Flutter实战·第二版》 (flutterchina.club) -
itfitness/BottomNavigationBarDemo - 码云 - 开源中国 (gitee.com) -
Flutter底部导航 - 简书 (jianshu.com) -
Flutter之自定义底部导航条以及页面切换实例——Flutter基础系列houruoyu3的博客-CSDN博客flutter 自定义底部导航 -
How To Use HTTP Requests in Flutter | DigitalOcean -
在Flutter中发起HTTP网络请求 - Flutter中文网 (flutterchina.club) -
Fetch data from the internet | Flutter -
获取网络数据 - Flutter 中文文档 - Flutter 中文开发者网站 - Flutter -
深入理解 Function & Closure - Flutter 中文文档 - Flutter 中文开发者网站 - Flutter -
Django And Flutter — A Step by Step Tutorial for a Boilerplate Application | by Clever Tech Memes | Medium -
multithreading - Multithreaded web server in python - Stack Overflow -
Simple Python HTTP Server with multi-threading and partial-content support (github.com) -
meska/mjpeg_stream_webcam: Webcam Streamer for Octoprint MacOs (github.com) -
blueimp/mjpeg-server: MJPEG Server implements MJPEG over HTTP using FFmpeg or any other input source capable of piping a multipart JPEG stream to stdout. Its primary use case is providing Webdriver screen recordings. (github.com) -
n3wtron/simple_mjpeg_streamer_http_server: simple python mjpeg streamer http server (github.com) -
Python3远程监控程序实现肥宅Sean的博客-CSDN博客 -
opencv imencode跟imdecode函数jpg（python） - PythonTechWorld -
flutter_mjpeg | Flutter Package (pub.dev) -
Can't work on web platform. · Issue #13 · mylisabox/flutter_mjpeg (github.com) -
Consider if fetchis widely supported enough to use · Issue #595 · dart-lang/http (github.com) -
在 Flutter | 中创建实时视频流应用程序作者：Mitrajeet Golsangi |开发人员学生社区 Vishwakarma 技术学院，浦那 |中等 (medium.com) -
Python websockets.serve方法代碼示例 - 純淨天空 (vimsky.com) -
Flutter 常用組件講解 | ImageWidget - iT 邦幫忙::一起幫忙解決難題，拯救 IT 人的一天 (ithome.com.tw) -
Bad State: Stream has already been listened to. · Issue #29105 · flutter/flutter (github.com) -
flutter - Streambuilder with WebSockets stream in TabBarView: Bad state: Stream has already been listened to - Stack Overflow -
使用WebSockets - Flutter中文网 (flutterchina.club) -
VideoStreaming.dart (github.com) -
在 Flutter | 中创建实时视频流应用程序作者：Mitrajeet Golsangi |开发人员学生社区 Vishwakarma 技术学院，浦那 |中等 (medium.com) -
Flutter：WebSocket封装-实现心跳、重连机制 - 让我留在你身边 (ricardolsw.github.io) -
2.3 状态管理 | 《Flutter实战·第二版》 (flutterchina.club) -
路由和导航 - Flutter 中文文档 - Flutter 中文开发者网站 - Flutter -
7.6 异步UI更新（FutureBuilder、StreamBuilder） | 《Flutter实战·第二版》 (flutterchina.club) -
Flutter 常用組件講解 | ImageWidget - iT 邦幫忙::一起幫忙解決難題，拯救 IT 人的一天 (ithome.com.tw) -
Step By Step Tutorial in Learning Flutter: Lesson 12 — Adding Image (Ice Pokemon) | by Misterflutter | Quick Code | Medium -
Django CORS on static asset - Stack Overflow -
配置 | Django 文档 | Django (djangoproject.com) -
Global Variables in Dart - Stack Overflow -
UVC - Community Help Wiki (ubuntu.com) -
利用OpenCV进行H264视频编码的简易方式 - 知乎 (zhihu.com) -
Documentation for OPENCV_FFMPEG_WRITER_OPTIONS and OPENCV_FFMPEG_CAPTURE_OPTIONS · Issue #21155 · opencv/opencv (github.com) -
利用OpenCV进行H264视频编码的简易方式 - 知乎 (zhihu.com) -
FFmpeg概述及编码支持 - 知乎 (zhihu.com) -
Web 渲染器 - Flutter 中文文档 - Flutter 中文开发者网站 - Flutter
最主要的，对完美体育·（中国）手机网页版MYD-YT507开发板有了深入的了解，进行了实际的应用。作为一款车规级处理器T507的开发板，名不虚传！
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