push RTSP stream with ffmpeg by python

readme

I have not found information on the Internet to implement the python push RTSP stream, so I try it.







I think RTMP can get more way to make it. 

:)

main.py

import cv2
import subprocess as sp
if __name__ == "__main__":
    rtsp_server = 'rtsp://example.org:554/...' # push server (output server)
    
    #pull rtsp data, or your cv cap.  (input server)
    cap = cv2.VideoCapture(
        'rtsp://example.org:554/pull from me ')
    
    
    sizeStr = str(int(cap.get(cv2.CAP_PROP_FRAME_WIDTH))) + \
        'x' + str(int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT)))
    fps = int(cap.get(cv2.CAP_PROP_FPS))
    
    command = ['ffmpeg',
               '-re',
               '-s', sizeStr,
               '-r', str(fps),  # rtsp fps (from input server)
               '-i', '-',
               
               # You can change ffmpeg parameter after this item.
               '-pix_fmt', 'yuv420p',
               '-r', '30',  # output fps
               '-g', '50',
               '-c:v', 'libx264',
               '-b:v', '2M',
               '-bufsize', '64M',
               '-maxrate', "4M",
               '-preset', 'veryfast',
               '-rtsp_transport', 'tcp',
               '-segment_times', '5',
               '-f', 'rtsp',
               rtsp_server]

    process = sp.Popen(command, stdin=sp.PIPE)

    while(cap.isOpened()):
        ret, frame = cap.read()
        ret2, frame2 = cv2.imencode('.png', frame)
        process.stdin.write(frame2.tobytes())

Hi,
It seems you have to pass a source video as argument in line 7.
You can specify a device as follow:
cap = cv2.VideoCapture(0) #This is for devices like webcams
Or
cap = cv2.VideoCapture("~/videos/stream.mp4")

Yes, you can use any source to push RTSP stream.

This gist just push RTSP stream, any input source is available.

Is there any documentation about using ffmpeg command in the format you posted above? For example, for changing the size video to a minor quality