esp32cam与esp32之间视频传输代码实现
时间: 2023-09-27 12:10:32 浏览: 192
我可以为您提供一些参考。您可以使用ESP32-CAM模块和ESP32控制器来实现视频传输。首先,您需要为ESP32-CAM设置摄像头,并使用WiFi连接将图像传输到ESP32。您可以使用Arduino IDE或其他IDE来编写代码。
以下是用于ESP32-CAM和ESP32之间视频传输的简单代码示例:
1.设置ESP32-CAM摄像头
#include "esp_camera.h"
void setup() {
camera_config_t config;
config.ledc_timer = LEDC_TIMER_0;
config.ledc_channel = LEDC_CHANNEL_0;
config.pin_d0 = 5;
config.pin_d1 = 18;
config.pin_d2 = 19;
config.pin_d3 = 21;
config.pin_d4 = 36;
config.pin_d5 = 39;
config.pin_d6 = 34;
config.pin_d7 = 35;
config.pin_xclk = 0;
config.pin_pclk = 22;
config.pin_vsync = 25;
config.pin_href = 23;
config.pin_sscb_sda = 26;
config.pin_sscb_scl = 27;
config.pin_pwdn = 32;
config.pin_reset = -1;
config.xclk_freq_hz = 20000000;
config.pixel_format = PIXFORMAT_JPEG;
// 初始化图像传感器
esp_err_t err = esp_camera_init(&config);
if (err != ESP_OK) {
Serial.printf("Camera init failed with error 0x%x", err);
return;
}
}
2.获取图像并将其传输到ESP32
#include "esp_camera.h"
#include <WiFi.h>
const char* ssid = "your-ssid";
const char* password = "your-password";
const char* streamUrl = "http://your-server/stream";
void setup() {
// ...
// 初始化Wi-Fi连接
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.println("Connecting to WiFi...");
}
}
void loop() {
camera_fb_t * fb = esp_camera_fb_get();
if (!fb) {
Serial.println("Failed to capture image");
return;
}
WiFiClient client;
if (!client.connect(streamUrl, 80)) {
Serial.println("Connection failed");
return;
}
// 发送HTTP POST请求
client.println("POST /stream HTTP/1.1");
client.println("Content-Type: image/jpeg");
client.print("Content-Length: ");
client.println(fb->len);
client.println();
// 发送JPEG格式图像
client.write(fb->buf, fb->len);
// 释放摄像头缓存
esp_camera_fb_return(fb);
}
3.搭建接收视频的服务器并显示视频
将视频流发送到您自己的服务器之后,您需要设置一个Web服务器来显示视频。您可以使用Node.js和Socket.io来实现这一点。以下是一个简单的Node.js代码示例:
var app = require('http').createServer(handler)
var io = require('socket.io')(app);
var fs = require('fs');
var url = require('url');
app.listen(80);
function handler (req, res) {
var reqUrl = url.parse(req.url, true);
var filePath = '.' + reqUrl.pathname;
if (filePath == './') {
filePath = './index.html';
}
fs.readFile(filePath, function(err, data) {
if (err) {
res.writeHead(404);
return res.end('Error 404: Not Found');
}
res.writeHead(200);
res.end(data);
});
}
io.on('connection', function (socket) {
console.log('client connected');
socket.on('stream', function(image) {
io.emit('stream', image);
});
});
在Web应用程序中,您需要一个可以显示视频的HTML页面。您可以使用canvas标签或video标签来显示视频。将视频流转换为JS图像对象,然后将其绘制在画布上。这里是一个简单的HTML和JavaScript代码示例:
<!DOCTYPE html>
<html>
<head>
<title>ESP32 Video Stream</title>
</head>
<body>
<canvas id="canvas"></canvas>
<script src="/socket.io/socket.io.js"></script>
<script>
var canvas = document.getElementById('canvas');
var ctx = canvas.getContext('2d');
var socket = io();
socket.on('connect', function() {
console.log('connected');
});
socket.on('stream', function(image) {
// 将图像转换为JS图像对象
var img = new Image();
img.onload = function() {
// 在画布上绘制图像
ctx.clearRect(0, 0, canvas.width, canvas.height);
ctx.drawImage(img, 0, 0, canvas.width, canvas.height);
};
img.src = 'data:image/jpeg;base64,' + image;
});
</script>
</body>
</html>
希望这些代码对您有所帮助。
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