0
'''capture.py'''
import cv, sys
cap = cv.CaptureFromCAM(0)                    # 0 is for /dev/video0
while True :
if not cv.GrabFrame(cap) : break
frame = cv.RetrieveFrame(cap)
sys.stdout.write( frame.tostring() )

Then I am piping it into ffmpeg and starting a mpegts server

python capture.py | ffmpeg -f rawvideo -pixel_format bgr24 -video_size 1440x1080 -framerate 10 -an -i - -c:v h264_nvenc -preset llhp -b:v 3000k -profile:v high -g 1 -vsync 0 -an -f mpegts tcp://localhost:5000?listen&overrun_nonfatal=1&ttl=10&pkt_size=188&buffer_size=8000k

Then as a test, I am reading the stream from ffplay as a client

ffplay tcp://localhost:5000

I am seeing a 6-8 second delay of the stream using this on localhost, but I expect it could be much faster. Can anyone please advise on how to make this pipeline faster but still use openCV from Python to capture frames and send them to ffmpeg?

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.