例程讲解14-WiFi-Shield->mjpeg_streamer视频流

# MJPEG视频流
#
# 这个例子展示了如何将MJPEG流式传输到火狐或者谷歌浏览器,Firefox和Android上的MJpegViewer应用程序已经过测试。
# 连接到从ifconfig打印出的IP地址/端口以查看流。

import sensor, image, time, network, usocket, sys

SSID =''     # Network SSID
KEY  =''     # Network key
HOST =''     # 使用第一个可用的端口
PORT = 8080  # 任意非特权端口

# 重置传感器
sensor.reset()

# 设置传感器的设置
sensor.set_contrast(1)
sensor.set_brightness(1)
sensor.set_saturation(1)
sensor.set_gainceiling(16)
sensor.set_framesize(sensor.QQVGA)
sensor.set_pixformat(sensor.GRAYSCALE)

# 初始化wlan模块并连接到网络
print("Trying to connect... (may take a while)...")
wlan = network.WINC()
wlan.connect(SSID, key=KEY, security=wlan.WPA_PSK)

# 我们现在通过DHCP应该有一个有效的IP
print(wlan.ifconfig())

# 创建服务器socket
s = usocket.socket(usocket.AF_INET, usocket.SOCK_STREAM)

# 绑定和听
s.bind([HOST, PORT])
s.listen(5)

# 将服务器套接字设置为非阻塞
s.setblocking(True)

def start_streaming(s):
    print ('Waiting for connections..')
    client, addr = s.accept()
    # 将客户端套接字超时设置为2s
    client.settimeout(2.0)
    print ('Connected to ' + addr[0] + ':' + str(addr[1]))

    # 从客户端读取请求
    data = client.recv(1024)
    # 这里解析客户端请求

    # Send multipart header
    # 发送多部分头
    client.send("HTTP/1.1 200 OK\r\n" \
                "Server: OpenMV\r\n" \
                "Content-Type: multipart/x-mixed-replace;boundary=openmv\r\n" \
                "Cache-Control: no-cache\r\n" \
                "Pragma: no-cache\r\n\r\n")

    # FPS clock
    clock = time.clock()

    # 开始流式图像
    # 注意:禁用IDE预览以增加流的FPS帧率。
    while (True):
        clock.tick() # 跟踪快照()之间经过的毫秒数。
        frame = sensor.snapshot()
        cframe = frame.compressed(quality=35)
        header = "\r\n--openmv\r\n" \
                 "Content-Type: image/jpeg\r\n"\
                 "Content-Length:"+str(cframe.size())+"\r\n\r\n"
        client.send(header)
        client.send(cframe)
        print(clock.fps())

while (True):
    try:
        start_streaming(s)
    except OSError as e:
        print("socket error: ", e)
        #sys.print_exception(e)

星瞳科技OpenMV官方中文文档函数讲解:

星瞳科技OpenMV官方中文文档函数讲解:

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