esp32cam推流至服务器+网站显示
esp32cam将数据上传至公网,前端vue展示
概要
记录一次esp32cam 推流到公网的学习,本来是想找rstp跟rmtp推流能力不足放弃了,最后采用了图传的方式上传。
这里记录一下自己学习的几种方式,以免忘记
1.esp32cam+nodejs+python(tcp)
esp32 cam 的代码:
这里是将esp32拍摄的图片流一张一张的上传到tcp服务器中。
/*
网络调试助手
https://soft.3dmgame.com/down/213757.html
*/
#include <Arduino.h>
#include <WiFi.h>
#include "esp_camera.h"
#include <vector>
const char *ssid = "*******";//wifi名称
const char *password = "--------------";//wifi密码
const IPAddress serverIP(192,168,0,2); //欲访问的地址
uint16_t serverPort = 8080; //服务器端口号
#define maxcache 1430
WiFiClient client; //声明一个客户端对象,用于与服务器进行连接
//CAMERA_MODEL_AI_THINKER类型摄像头的引脚定义
#define PWDN_GPIO_NUM 32
#define RESET_GPIO_NUM -1
#define XCLK_GPIO_NUM 0
#define SIOD_GPIO_NUM 26
#define SIOC_GPIO_NUM 27
#define Y9_GPIO_NUM 35
#define Y8_GPIO_NUM 34
#define Y7_GPIO_NUM 39
#define Y6_GPIO_NUM 36
#define Y5_GPIO_NUM 21
#define Y4_GPIO_NUM 19
#define Y3_GPIO_NUM 18
#define Y2_GPIO_NUM 5
#define VSYNC_GPIO_NUM 25
#define HREF_GPIO_NUM 23
#define PCLK_GPIO_NUM 22
static camera_config_t camera_config = {
.pin_pwdn = PWDN_GPIO_NUM,
.pin_reset = RESET_GPIO_NUM,
.pin_xclk = XCLK_GPIO_NUM,
.pin_sscb_sda = SIOD_GPIO_NUM,
.pin_sscb_scl = SIOC_GPIO_NUM,
.pin_d7 = Y9_GPIO_NUM,
.pin_d6 = Y8_GPIO_NUM,
.pin_d5 = Y7_GPIO_NUM,
.pin_d4 = Y6_GPIO_NUM,
.pin_d3 = Y5_GPIO_NUM,
.pin_d2 = Y4_GPIO_NUM,
.pin_d1 = Y3_GPIO_NUM,
.pin_d0 = Y2_GPIO_NUM,
.pin_vsync = VSYNC_GPIO_NUM,
.pin_href = HREF_GPIO_NUM,
.pin_pclk = PCLK_GPIO_NUM,
.xclk_freq_hz = 20000000,
.ledc_timer = LEDC_TIMER_0,
.ledc_channel = LEDC_CHANNEL_0,
.pixel_format = PIXFORMAT_JPEG,
.frame_size = FRAMESIZE_VGA,
.jpeg_quality = 12,
.fb_count = 1,
};
void wifi_init()
{
WiFi.mode(WIFI_STA);
WiFi.setSleep(false); //关闭STA模式下wifi休眠,提高响应速度
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED)
{
delay(500);
Serial.print(".");
}
Serial.println("WiFi Connected!");
Serial.print("IP Address:");
Serial.println(WiFi.localIP());
}
esp_err_t camera_init() {
//initialize the camera
esp_err_t err = esp_camera_init(&camera_config);
if (err != ESP_OK) {
Serial.println("Camera Init Failed");
return err;
}
sensor_t * s = esp_camera_sensor_get();
//initial sensors are flipped vertically and colors are a bit saturated
if (s->id.PID == OV2640_PID) {
// s->set_vflip(s, 1);//flip it back
// s->set_brightness(s, 1);//up the blightness just a bit
// s->set_contrast(s, 1);
}
Serial.println("Camera Init OK!");
return ESP_OK;
}
void setup()
{
Serial.begin(115200);
wifi_init();
camera_init();
}
void loop()
{
Serial.println("Try To Connect TCP Server!");
if (client.connect(serverIP, serverPort)) //尝试访问目标地址
{
Serial.println("Connect Tcp Server Success!");
//client.println("Frame Begin"); //46 72 61 6D 65 20 42 65 67 69 6E // 0D 0A 代表换行 //向服务器发送数据
while (1){
camera_fb_t * fb = esp_camera_fb_get();
uint8_t * temp = fb->buf; //这个是为了保存一个地址,在摄像头数据发送完毕后需要返回,否则会出现板子发送一段时间后自动重启,不断重复
if (!fb)
{
Serial.println( "Camera Capture Failed");
}
else
{
//先发送Frame Begin 表示开始发送图片 然后将图片数据分包发送 每次发送1430 余数最后发送
//完毕后发送结束标志 Frame Over 表示一张图片发送完毕
client.print("Frame Begin"); //一张图片的起始标志
// 将图片数据分段发送
int leng = fb->len;
int timess = leng/maxcache;
int extra = leng%maxcache;
for(int j = 0;j< timess;j++)
{
client.write(fb->buf, maxcache);
for(int i =0;i< maxcache;i++)
{
fb->buf++;
}
}
client.write(fb->buf, extra);
client.print("Frame Over"); // 一张图片的结束标志
Serial.print("This Frame Length:");
Serial.print(fb->len);
Serial.println(".Succes To Send Image For TCP!");
//return the frame buffer back to the driver for reuse
fb->buf = temp; //将当时保存的指针重新返还
esp_camera_fb_return(fb); //这一步在发送完毕后要执行,具体作用还未可知。
}
delay(20);//短暂延时 增加数据传输可靠性
}
/*
while (client.connected() || client.available()) //如果已连接或有收到的未读取的数据
{
if (client.available()) //如果有数据可读取
{
String line = client.readStringUntil('\n'); //读取数据到换行符
Serial.print("ReceiveData:");
Serial.println(line);
client.print("--From ESP32--:Hello Server!");
}
}
Serial.println("close connect!");
client.stop(); //关闭客户端
*/
}
else
{
Serial.println("Connect To Tcp Server Failed!After 10 Seconds Try Again!");
client.stop(); //关闭客户端
}
delay(10000);
}
以下是nodejs搭建tcp服务器的代码:
因为自己没用过nodejs服务器,当时弄这个花了不时间。这里同时记录下nodejs服务器的简单搭建。这里用的是宝塔搭建的:
以上nodejs的简单搭建就算完成。
如果想在本地启动,启动方式是:
node app.js
// 创建tcp连接服务
const net = require('net')
const { size } = require('underscore')
const HOST = '192.168.0.2'
const PORT = 8080
// 统计连接客户端的个数
var count = 0
// 创建slave_server服务
const slave_server = new net.createServer()
// slave_server.setEncoding = 'UTF-8'
// 保存监视器的socket
var s
// 获得一个连接,该链接自动关联scoket对象
var tcp_sock = null
slave_server.on('connection', sock => {
tcp_sock = sock
sock.name = ++count
console.log(`当前连接客户端数:${count}`)
// 接收client发来的信息
sock.on('data', data => {
// console.log(`客户端${sock.name}发来一个信息:${data}`)
// 判断是否为监视器发来的链接
if (data == 'monitor') {
// 则把当前的socket保存起来
s = sock
} else {
s.write(data)
}
})
// 为socket添加error事件处理函数
sock.on('error', error => { //监听客户端异常
console.log('error' + error)
sock.end()
})
// 服务器关闭时触发,如果存在连接,这个事件不会被触发,直到所有的连接关闭
sock.on('close', () => {
console.log(`客户端${sock.name}下线了`)
count -= 1
})
})
// listen函数开始监听指定端口
slave_server.listen(PORT, () => {
console.log(`服务器已启动,运行在:http://xxxx:xxxx`)
})
python客户端:
这边是在windows上启动的
python app.py
import socket
import threading
import time
import numpy as np
import cv2
import subprocess
from moviepy.editor import *
begin_data = b'Frame Begin'
end_data = b'Frame Over'
#接收数据
# ESP32发送一张照片的流程
# 先发送Frame Begin 表示开始发送图片 然后将图片数据分包发送 每次发送1430 余数最后发送
# 完毕后发送结束标志 Frame Over 表示一张图片发送完毕
# 1430 来自ESP32cam发送的一个包大小为1430 接收到数据 data格式为b''
def handle_sock(sock, addr):
temp_data = b''
t1 = int(round(time.time() * 1000))
while True:
data = sock.recv(1430)
# 如果这一帧数据包的开头是 b'Frame Begin' 则是一张图片的开始
if data[0:len(begin_data)] == begin_data:
# 将这一帧数据包的开始标志信息(b'Frame Begin')清除 因为他不属于图片数据
data = data[len(begin_data):len(data)]
# 判断这一帧数据流是不是最后一个帧 最后一针数据的结尾时b'Frame Over'
while data[-len(end_data):] != end_data:
temp_data = temp_data + data # 不是结束的包 讲数据添加进temp_data
data = sock.recv(1430)# 继续接受数据 直到接受的数据包包含b'Frame Over' 表示是这张图片的最后一针
# 判断为最后一个包 将数据去除 结束标志信息 b'Frame Over'
temp_data = temp_data + data[0:(len(data) - len(end_data))] # 将多余的(\r\nFrame Over)去掉 其他放入temp_data
# 显示图片
receive_data = np.frombuffer(temp_data, dtype='uint8') # 将获取到的字符流数据转换成1维数组
r_img = cv2.imdecode(receive_data, cv2.IMREAD_COLOR) # 将数组解码成图像
r_img = r_img.reshape(480, 640, 3)
t2 = int(round(time.time() * 1000))
fps = 1000//(t2-t1)
cv2.putText(r_img, "FPS" + str(fps), (50, 50), cv2.FONT_HERSHEY_SIMPLEX, 1, (255, 0, 0), 2)
cv2.imshow('server_frame', r_img)
if cv2.waitKey(1) & 0xFF == ord('q'):
break
t1 = t2
print("接收到的数据包大小:" + str(len(temp_data))) # 显示该张照片数据大小
temp_data = b'' # 清空数据 便于下一章照片使用
server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server.connect(("192,168,0,2", 8080))
server.send('monitor'.encode("utf-8"))
#主线程循环接收客户端连接
handle_sock(server, '')
全部代码就这些,主要的流程是:
esp32上传到nodejs服务器->nodejs服务器接收转发->python客户端请求服务器,服务器下发
但是这里的python客户端必须用在windows,因为python的cv2.imshow是具有图像界面的,用在服务器上会报错(反正我用的时候会报错,有更好的办法可以告诉我)
以上代码出处:
链接: https://blog.csdn.net/phoenix3k/article/details/128446232
这里的服务端也可以直接使用python+ffmpeg转发成视频流,但是我实现不了,技术不够。能解决的朋友麻烦踢下我。
因为我的业务是想要直接能在公网上播放的,所以上面的方案我的技术实现不了,所以我采用了planB。
2.esp32cam+python+vue(websocket)
esp32cam:
#include "WiFi.h"
#include "esp_camera.h"
//#include "base64.h"
#include <ArduinoJson.h>
#include <WebSocketsClient.h>
//#include <SocketIOclient.h>
// Pin definition for CAMERA_MODEL_AI_THINKER
#define PWDN_GPIO_NUM 32
#define RESET_GPIO_NUM -1
#define XCLK_GPIO_NUM 0
#define SIOD_GPIO_NUM 26
#define SIOC_GPIO_NUM 27
#define Y9_GPIO_NUM 35
#define Y8_GPIO_NUM 34
#define Y7_GPIO_NUM 39
#define Y6_GPIO_NUM 36
#define Y5_GPIO_NUM 21
#define Y4_GPIO_NUM 19
#define Y3_GPIO_NUM 18
#define Y2_GPIO_NUM 5
#define VSYNC_GPIO_NUM 25
#define HREF_GPIO_NUM 23
#define PCLK_GPIO_NUM 22
// Replace with your network credentials
const char* hostname = "ESP32CAM";
const char* ssid = "Tenda_66A6B0";
const char* password = "12345678";
WebSocketsClient webSocket;
void webSocketEvent(WStype_t type, uint8_t * payload, size_t length) {
switch(type) {
case WStype_DISCONNECTED:
Serial.printf("[WSc] Disconnected!\n");
break;
case WStype_CONNECTED: {
Serial.printf("[WSc] Connected to url: %s\n", payload);
//webSocket.sendTXT("camlogin");
}
break;
case WStype_TEXT:
Serial.printf("[WSc] get text: %s\n", payload);
break;
case WStype_BIN:
// Serial.printf("[WSc] get binary length: %u\n", length);
break;
case WStype_PING:
// pong will be send automatically
Serial.printf("[WSc] get ping\n");
break;
case WStype_PONG:
// answer to a ping we send
Serial.printf("[WSc] get pong\n");
break;
}
}
void setupCamera()
{
camera_config_t config;
config.ledc_channel = LEDC_CHANNEL_0;
config.ledc_timer = LEDC_TIMER_0;
config.pin_d0 = Y2_GPIO_NUM;
config.pin_d1 = Y3_GPIO_NUM;
config.pin_d2 = Y4_GPIO_NUM;
config.pin_d3 = Y5_GPIO_NUM;
config.pin_d4 = Y6_GPIO_NUM;
config.pin_d5 = Y7_GPIO_NUM;
config.pin_d6 = Y8_GPIO_NUM;
config.pin_d7 = Y9_GPIO_NUM;
config.pin_xclk = XCLK_GPIO_NUM;
config.pin_pclk = PCLK_GPIO_NUM;
config.pin_vsync = VSYNC_GPIO_NUM;
config.pin_href = HREF_GPIO_NUM;
config.pin_sscb_sda = SIOD_GPIO_NUM;
config.pin_sscb_scl = SIOC_GPIO_NUM;
config.pin_pwdn = PWDN_GPIO_NUM;
config.pin_reset = RESET_GPIO_NUM;
config.xclk_freq_hz = 20000000;
config.pixel_format = PIXFORMAT_JPEG;
config.frame_size = FRAMESIZE_QVGA; // FRAMESIZE_ + QVGA|CIF|VGA|SVGA|XGA|SXGA|UXGA
config.jpeg_quality = 10;
config.fb_count = 1;
// Init Camera
esp_err_t err = esp_camera_init(&config);
if (err != ESP_OK) {
Serial.printf("Camera init failed with error 0x%x", err);
return;
}
}
void setup(){
Serial.begin(115200);
// Connect to Wi-Fi
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.println("Connecting to WiFi..");
}
// Print ESP32 Local IP Address
Serial.println(WiFi.localIP());
setupCamera();
// server address, port and URL
webSocket.begin("192,168,0,2",8080);
webSocket.onEvent(webSocketEvent);
webSocket.setReconnectInterval(5000);
webSocket.enableHeartbeat(15000, 3000, 2);
}
unsigned long messageTimestamp = 0;
void loop() {
webSocket.loop();
uint64_t now = millis();
if(now - messageTimestamp > 10) {
messageTimestamp = now;
camera_fb_t * fb = NULL;
// Take Picture with Camera
fb = esp_camera_fb_get();
if(!fb) {
Serial.println("Camera capture failed");
return;
}
webSocket.sendBIN(fb->buf,fb->len);
Serial.println("Image sent");
esp_camera_fb_return(fb);
}
}
python服务器:
如果要多人查看可以在代码中吧注释打开,然后吧await USERS[len(USERS)-1].send(data)注释,但是这里会报code = 1001 (going away),暂时解决不了,希望有缘人可以告知
if len(USERS) >= 2:
await USERS[len(USERS)-1].send(data)
#for USER in USERS:
# await USER.send(data)
import asyncio
import websockets
import cv2 as cv
import binascii
import time
import numpy as np
USERS = []
async def recv_msg(websocket):
USERS.append(websocket)
print('user',USERS,len(USERS))
while True:
try:
recv_text = await websocket.recv()
data = binascii.a2b_hex(recv_text.hex())
data1 = np.frombuffer(data, dtype=np.uint8)
lenmes=len(data)
if lenmes < 1000:
continue
img = cv.imdecode(data1, 1)
#cv.imshow('result', img)
cv.waitKey(1)
if len(USERS) >= 2:
await USERS[len(USERS)-1].send(data)
#for USER in USERS:
# await USER.send(data)
# asyncio.ensure_future(USER.send(data))
#time.sleep(0.01)
data = ''
finally:
pass
async def main_logic(websocket, path):
await recv_msg(websocket)
# 把ip换成自己本地的ip
start_server = websockets.serve(main_logic, "",8080)
asyncio.get_event_loop().run_until_complete(start_server)
asyncio.get_event_loop().run_forever()
前端vue展示:
esp.vue
<template>
<div>
<img id="show" style="width:300px;" />
</div>
</template>
<script src="./esp.js"></script>
esp.js
/* eslint-disable */
export default {
components: {
},
data() {
return {
url: "",
websocket: null
}
},
mounted() {
this.initWebSocket();
},
created() {
},
methods: {
initWebSocket() {
var that = this
var wsUri = "ws://192.168.0.2:8080/";
this.websocket = new WebSocket(wsUri);
this.websocket.onopen = function (evt) {
that.onOpen(evt)
};
this.websocket.onclose = function (evt) {
that.onClose(evt)
};
this.websocket.onmessage = function (evt) {
that.onMessage(evt)
};
this.websocket.onerror = function (evt) {
that.onError(evt)
};
},
onOpen(evt) {
console.log("CONNECTED")
},
onClose(evt) {
console.log("DISCONNECTED")
},
onMessage(evt) {
var reader = new FileReader();
reader.onload = function (eve) {
if (eve.target.readyState == FileReader.DONE) {
var img = document.getElementById("show");
img.src = this.result;
}
};
reader.readAsDataURL(event.data);
},
onError(evt) {
console.log(evt.data)
}
}
}
以上就可以在网页前段查看视频。
主要流程是:
esp32cam上传 图片帧到服务器上->python接收图片下发->vue展示
以上代码出处:
链接: https://github.com/jeiry/esp32cam-and-mp
小结
esp32cam 摄像头分辨率修改:
config.frame_size
FRAMESIZE_UXGA (1600 x 1200)
FRAMESIZE_QVGA (320 x 240)
FRAMESIZE_CIF (352 x 288)
FRAMESIZE_VGA (640 x 480)
FRAMESIZE_SVGA (800 x 600)
FRAMESIZE_XGA (1024 x 768)
FRAMESIZE_SXGA (1280 x 1024)
像素格式:
config.pixel_format
PIXFORMAT_RGB565
PIXFORMAT_YUV422
PIXFORMAT_GRAYSCALE
PIXFORMAT_JPEG
结语:
这里只是提供一下例子,有更好的方法希望可以告知一下。大家一起相互学习
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