c++调用的python代码

import ffmpeg

import cv2

import numpyas np

out_filename ="C://Users//new//Videos//202204061434-out2.mp4"

width =640

height =480

video_format ="h264"

server_url ="udp://127.0.0.1:1234"

#ffmpeg.input("video=xxx",format="dshow").output(filename=server_url,format=video_format,listen=1).run_async()

#ffmpeg.exe -f gdigrab -video_size 640x480 -i desktop -tune zerolatency -vcodec h264  -preset ultrafast -g 13 -max_delay 100 -r 20  -acodec aac -pkt_size 1316 -probesize 32 -flags low_delay -f h264 udp://localhost:12345

#ffmpeg.input("C://Users//new//Videos//1.mp4").output(filename=server_url,format=video_format,listen=1).run_async()

def gadd(a,b):

cv2.imshow("img", b)

saveFile ="imgSave.png"  # 保存文件的路径

    # cv2.imwrite(saveFile, img3, [int(cv2.IMWRITE_PNG_COMPRESSION), 8])  # 保存图像文件, 设置压缩比为8

    cv2.imwrite(saveFile, b)# 保存图像文件

    frame_to2(b)

process2 = (

ffmpeg

.input('pipe:',format='rawvideo',pix_fmt='rgb24',s='{}x{}'.format(width, height))

.output(server_url,vcodec="libx264",format=video_format,pkt_size=1316,preset="ultrafast",tune="zerolatency")

.overwrite_output()

.run_async(pipe_stdin=True)

)

flag=0

def frame_to2(out_frame):

global flag

if(flag==1):

flag=0

        else:

process2.stdin.write(

out_frame

.astype(np.uint8)

.tobytes()

)

flag=1

        # if(++i<100):

#    process2.stdin.close()