Want to push a frame after the video processing a frame out go to, let others through the RTMP access, the following is to find the code, I python3.6
Run, p.com municate (frame. The tostring ())
The File "F: \ software \ Anaconda3 \ envs \ pytorch \ lib \ subprocess py", line 924, communicate in
Self. _stdin_write (input)
The File "F: \ software \ Anaconda3 \ envs \ pytorch \ lib \ subprocess py", line 873, in _stdin_write
The self. The stdin. Write (input)

 import cv2 
The import subprocess as sp 
The import subprocess as sp 

RtmpUrl="RTMP://39.107.26.100:1935/myapp/test1" 
Camera_path="video. Mp4" 

Cap=cv2. VideoCapture (camera_path) 

# Get video information 
FPS=int (cap) get (cv2. CAP_PROP_FPS)) 
Width=int (cap) get (cv2. CAP_PROP_FRAME_WIDTH)) 
Height=int (cap) get (cv2. CAP_PROP_FRAME_HEIGHT)) 
# ffmpeg command 
The command=[' ffmpeg, 
'- y' 
'- f', 'rawvideo', 
'- vcodec', 'rawvideo', 
'- pix_fmt', 'bgr24', 
'-s', "{} {} x". The format (width, height), 
'-r' STR (FPS), 
'-i', '-', 
'- c: v', 'libx264' 
'- pix_fmt', 'yuv420p', 
'- preset', 'ultrafast', 
'- f', 'FLV', 
RtmpUrl] 
# pipeline configuration 
P=sp. Popen (command, stdin=sp. PIPE) 
# read webcamera 
While (cap) isOpened ()) : 
Ret, frame=cap. The read () 
# print (" running... 
 ")If not ret: 
Print (" Opening camera is failed ") 
Break 
P. tdin. Write (frame. The tostring ()) 


Return_value, frame=cap. The read ()