ESP32获取视频流代码说明

获取视频流需要使用ESP32的摄像头模块和WiFi模块。下面是一个基本的获取视频流的代码示例，供参考：

#include "esp_camera.h"
#include <WiFi.h>
 
// WiFi网络设置
const char* ssid = "your_SSID";
const char* password = "your_PASSWORD";
 
// 使用HTTP协议发送视频流
WiFiServer server(80);
 
// 设置摄像头分辨率
#define CAMERA_MODEL_AI_THINKER
#include "camera_pins.h"
 
void setup() {
    Serial.begin(115200);
    // 初始化摄像头
    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_SVGA;
    config.jpeg_quality = 10;
    config.fb_count = 2;
 
    // 初始化摄像头
    esp_err_t err = esp_camera_init(&config);
    if (err != ESP_OK) {
        Serial.printf("Camera init failed with error 0x%x", err);
        return;
    }
 
    // 连接WiFi网络
    WiFi.begin(ssid, password);
    while (WiFi.status() != WL_CONNECTED) {
        delay(1000);
        Serial.println("Connecting to WiFi...");
    }
    Serial.println("WiFi connected");
 
    // 启动HTTP服务器
    server.begin();
    Serial.println("HTTP server started");
}
 
void loop() {
    // 等待客户端连接
    WiFiClient client = server.available();
    if (client) {
        // 发送HTTP头部
        client.println("HTTP/1.1 200 OK");
        client.println("Content-Type: multipart/x-mixed-replace; boundary=frame");
        client.println();
 
        while (client.connected()) {
            // 获取一帧图像
            camera_fb_t* fb = esp_camera_fb_get();
            if (!fb) {
                Serial.println("Camera capture failed");
                break;
            }
 
            // 发送图像数据
            client.print("--frame\r\nContent-Type: image/jpeg\r\nContent-Length: ");
            client.print(fb->len);
            client.print("\r\n\r\n");
            client.write(fb->buf, fb->len);
            client.print("\r\n");
 
            // 释放帧缓冲区
            esp_camera_fb_return(fb);
        }
 
        // 关闭连接
        client.stop();
    }
}

这个示例代码使用ESP32的摄像头模块获取图像，然后通过WiFi模块将视频流发送到客户端浏览器。代码中使用的分辨率和图像格式可以根据实际需要进行修改。