esp32cam使用rtsp协议推流到服务器，使用micropython代码

以下是使用MicroPython代码将ESP32-CAM推流到服务器的示例：

import network
import time
import uerrno
import usocket as socket
import ustruct as struct
from machine import Pin
from machine import UART
from machine import PWM
from machine import Timer
from machine import ADC
from machine import I2C
from machine import RTC
from machine import SPI
import esp32
import os
import gc
import uasyncio as asyncio

import picoweb
import ulogging

import sensor
import image

from machine import RTC

rtc = RTC()
rtc.init((2021, 1, 1, 0, 0, 0, 0, 0))

ssid = 'your_ssid'
password = 'your_password'
wlan = network.WLAN(network.STA_IF)

# 连接WiFi
def connect_wifi():
    wlan.active(True)
    if not wlan.isconnected():
        print('connecting to network...')
        wlan.connect(ssid, password)
        while not wlan.isconnected():
            pass
    print('network config:', wlan.ifconfig())

# 连接WiFi
connect_wifi()

# 设置日志
logger = ulogging.getLogger('app')
logger.setLevel(ulogging.INFO)

# 初始化摄像头
sensor.reset()
sensor.set_pixformat(sensor.RGB565)
sensor.set_framesize(sensor.QVGA)
sensor.set_vflip(True)
sensor.run(1)

# 初始化socket
def start_server():
    s = socket.socket()
    s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
    s.bind(('0.0.0.0', 554))
    s.listen(1)
    while True:
        conn, addr = s.accept()
        logger.info('Client connected from %s' % str(addr))
        request = conn.recv(1024)
        logger.info('Request: %s' % request)
        response = b''
        if request.startswith(b'OPTIONS'):
            # Respond to OPTIONS request
            response = b'RTSP/1.0 200 OK\r\nCSeq: 1\r\nPublic: OPTIONS, DESCRIBE, SETUP, TEARDOWN, PLAY, PAUSE\r\n\r\n'
        elif request.startswith(b'DESCRIBE'):
            # Respond to DESCRIBE request
            response = b'RTSP/1.0 200 OK\r\nCSeq: 2\r\nContent-Type: application/sdp\r\n\r\n' \
                       b'v=0\r\n' \
                       b'o=- 0 0 IN IP4 127.0.0.1\r\n' \
                       b's=ESP32CAM Video\r\n' \
                       b't=0 0\r\n' \
                       b'a=rtcp-unicast:reflection\r\n' \
                       b'm=video 0 RTP/AVP 96\r\n' \
                       b'a=rtpmap:96 H264/90000\r\n' \
                       b'a=fmtp:96 packetization-mode=1\r\n'
        elif request.startswith(b'SETUP'):
            # Respond to SETUP request
            response = b'RTSP/1.0 200 OK\r\nCSeq: 3\r\nTransport: RTP/AVP;unicast;client_port=5000-5001\r\n\r\n'
        elif request.startswith(b'PLAY'):
            # Respond to PLAY request
            response = b'RTSP/1.0 200 OK\r\nCSeq: 4\r\nRange: npt=0.000-\r\nSession: 1234567890\r\nRTP-Info: url=rtsp://192.168.1.2:554/\r\n\r\n'
            asyncio.get_event_loop().create_task(send_video(conn))
        elif request.startswith(b'TEARDOWN'):
            # Respond to TEARDOWN request
            response = b'RTSP/1.0 200 OK\r\nCSeq: 5\r\n\r\n'
            conn.close()
        else:
            logger.error('Unknown request')
        conn.send(response)

# 发送视频流
async def send_video(client):
    fps = 30
    frame_interval = int(1000 / fps)
    while True:
        start_time = time.ticks_ms()
        img = sensor.snapshot()
        client.sendall(img.to_bytes())
        end_time = time.ticks_ms()
        await asyncio.sleep_ms(frame_interval - (end_time - start_time))

# 启动服务器
start_server()

在此示例中，我们使用了MicroPython的uasyncio模块来异步发送视频流。我们还使用了ESP32-CAM的picoweb库来处理RTSP请求。在此示例中，我们将摄像头的视频流发送到客户端，并使用30帧每秒的帧率。你可以通过修改`fps`变量来更改帧率。