Video stream output via USB/TRRS port using OPENCV

Question

I have a raspberry and I process video from a camera connected via usb on it, I need to display in real time only the processed video directly through the usb/trrs port (not the entire desktop with an opencv window, but the video itself). In the end, I just need to connect another board and it received a raspberry output at its input as if it were just a camera.

P.S. C++/python implementation doesn't matter.

P.P.S. Wireless transmission is not suitable, it is necessary that the raspberry simulate the output of the usb/ trrs like real camera

Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. — Community, Oct 20 '22 at 11:20
OpenCV is for computer vision, not for making GUIs or video output. ask this on a raspberry-pi-specific forum. you seem to ask for specific hardware capabilities. — Christoph Rackwitz, Oct 20 '22 at 13:15
@ChristophRackwitz Thank for advice, I will ask it on a rpi forum) — Mike Arkl, Oct 20 '22 at 13:45

Mike Arkl · Answer 1 · 2022-10-20T19:57:46.037

1

Some steps:

Connect the raspberry to the display
ctrl + alt + f1
sudo service lightdm stop
ls /dev/fb* (should be our screen's framebuffer type fb0)

and then work with opencv like this

ret, frame = cap.read()
frame32 = cv2.cvtColor(frame, cv2.COLOR_BGR2BGRA)
fbframe = cv2.resize(frame32, (1920,1080))
with open('/dev/fb0', 'rb+') as buf:
buf.write(fbframe)

thread that helped

edited Oct 20 '22 at 19:57

answered Oct 20 '22 at 19:57

Mike Arkl

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Video stream output via USB/TRRS port using OPENCV

1 Answers1