Hi, I'm following this video guide (I'm using the last option presented in the video):
https://www.youtube.com/watch?v=sYGdge3T30o
Essentially my raspberry send a video stream with netcat, then a script on my pc receives this stream and redirects it in a pipe.
I tried to access the pipe with this:
VideoCapture cap("path to pipe");
it works, but requires minutes of waiting. Is there a way to drastically reduce this waiting time?
Alternatively, I found a code (posted below) in openCV that works fine, but it's in python and I need it in C++ for my project.
Is there a way to reach the same result in C++?
Thank you everybody.
import cv2
import subprocess as sp
import numpy
FFMPEG_BIN = "/home/gaspare/ffmpeg_sources/ffmpeg/ffmpeg"
command = [ FFMPEG_BIN,
'-i', 'fifo264', # fifo is the named pipe
'-pix_fmt', 'bgr24', # opencv requires bgr24 pixel format.
'-vcodec', 'rawvideo',
'-an','-sn', # we want to disable audio processing (there is no audio)
'-f', 'image2pipe', '-']
pipe = sp.Popen(command, stdout = sp.PIPE, bufsize=10**8)
while True:
# Capture frame-by-frame
raw_image = pipe.stdout.read(1280*720*3)
# transform the byte read into a numpy array
image = numpy.fromstring(raw_image, dtype='uint8')
image = image.reshape((720,1280,3)) # Notice how height is specified first and then width
if image is not None:
cv2.imshow('Video', image)
if cv2.waitKey(1) & 0xFF == ord('q'):
break
pipe.stdout.flush()
cv2.destroyAllWindows()
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