103 lines
4.0 KiB
Python
103 lines
4.0 KiB
Python
# 进行摄像头直播推流 / live_broadcast
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import cv2 as cv
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import time
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import subprocess as sp
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import multiprocessing
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import platform
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import psutil
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import datetime
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class stream_pusher(object):
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def __init__(self, rtmp_url=None, raw_frame_q=None): # 类实例化的时候传入rtmp地址和帧传入队列
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self.rtmp_url = rtmp_url
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self.raw_frame_q = raw_frame_q
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fps = 35 # 设置帧速率
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# 设置分辨率
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width = 640 # 宽
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height = 480 # 高
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# 设置FFmpeg命令文本
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self.command = ['ffmpeg',
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'-y',
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'-f', 'rawvideo',
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'-vcodec', 'rawvideo',
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'-pix_fmt', 'bgr24',
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'-s', "{}x{}".format(width, height),
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'-r', str(fps),
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'-i', '-',
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'-c:v', 'libx264',
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'-pix_fmt', 'yuv420p',
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'-preset', 'slow',
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'-f', 'flv',
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self.rtmp_url]
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# 对获取的帧做一些画面处理的方法,返回完成处理的帧。
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def __frame_handle__(self, raw_frame, text, shape1, shape2):
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# 帧用cv2进行一些处理,比如写上文本,画矩形等
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cv.putText(raw_frame, text.split('.')[0], (20, 40), cv.FONT_ITALIC, 0.8, (0, 0, 255), 1, cv.LINE_AA)
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return (raw_frame)
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# 向服务器推送
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def push_frame(self):
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# 指定在哪些cpu核上运行
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p = psutil.Process()
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p.cpu_affinity([0, 1, 2, 3])
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# 配置向os传递命令的管道
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p = sp.Popen(self.command, stdin=sp.PIPE)
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while True:
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# if not self.raw_frame_q.empty(): # 如果输入管道不为空
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# 把帧和相关信息从输入队列中取出
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raw_frame, text, shape1, shape2 = self.raw_frame_q.get()
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# 对获取的帧进行画面处理
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frame = self.__frame_handle__(raw_frame, text, shape1, shape2)
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# 把内容放入管道,放入后有os自己去执行
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p.stdin.write(frame.tostring())
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# else:
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# time.sleep(0.01)
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# 启动运行
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def run(self):
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# 定义一个子进程
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push_frame_p = multiprocessing.Process(target=self.push_frame, args=())
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push_frame_p.daemon = True # 把子进程设置为daemon方式
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push_frame_p.start() # 运行子进程
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if __name__ == '__main__':
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# 根据不同的操作系统,设定读取哪个摄像头
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if platform.system() == 'Linux': # 如果是Linux系统
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cap = cv.VideoCapture(10) # 绑定编号为10的摄像头
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cap.set(cv.CAP_PROP_FOURCC, cv.VideoWriter_fourcc('M', 'J', 'P', 'G'))
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cap.set(3, 640) # 设置摄像头画面的宽
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cap.set(4, 480) # 设置摄像头画面的高
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elif platform.system() == 'Darwin': # 如果是苹果的OS X系统
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cap = cv.VideoCapture(0) # 绑定编号为0的摄像头
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cap.set(cv.CAP_PROP_FOURCC, cv.VideoWriter_fourcc('M', 'J', 'P', 'G'))
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cap.set(3, 640)
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cap.set(4, 480)
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else: # 没有windows系统,所以就不判断了
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cap = cv.VideoCapture(0) # 绑定编号为0的摄像头
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cap.set(cv.CAP_PROP_FOURCC, cv.VideoWriter_fourcc('M', 'J', 'P', 'G'))
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# cap.set(3, 640)
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# cap.set(4, 480)
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rtmpUrl = "rtmp://39.97.124.237:1984/wodelive" # 用vcl等直播软件播放时,也用这个地址
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raw_q = multiprocessing.Queue() # 定义一个向推流对象传入帧及其他信息的队列
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my_pusher = stream_pusher(rtmp_url=rtmpUrl, raw_frame_q=raw_q) # 实例化一个对象
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my_pusher.run() # 让这个对象在后台推送视频流
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while True:
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_, raw_frame = cap.read()
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info = (raw_frame, str(datetime.datetime.now()), '3', '4') # 把需要送入队列的内容进行封装
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# if not raw_q.full(): # 如果队列没满
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raw_q.put(info) # 送入队列
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cv.waitKey(1)
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cap.release()
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print('finish')
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