Raspberry Pi get started with opencv | how to use opencv with a Raspberry Pi

In this video, you will learn to use the opencv library with the following scirpts :
- open a picture
- resize a picture and save it
- open the camera connected to the raspberry pi

[BenCrawley-yuuv]

This and the previous video on the playlist are the only things I've found online that properly explains how to set up and use a picamera 2 with opencv on a 64 bit Pi! Thanks so much!

[RMNVILLA]

Hello, I have tried this tutorial with orange pi 3b and ubuntu xfce and it worked for me, thank you.

[TungPe]

I got a trouble. When I use nano and python for VideoCapture I received a error like this "cv2.error: OpenCV(4.5.1) error: (-215:Assertion failed) size.width>0 && size.height>0 in function 'imshow' ". So how can I fix this? Thank you

[jackcomtw]

Hello, I followed your video and performed "raspi-config" to enable the legacy camera stack. I have the same hardware configuration as you, with the only difference being that my camera is ov5647. So, I added an additional setting "dtoverlay=ov5647" in /boot/config.txt.

However, when I run "camera.py, " I encounter an error.
[ WARN:0] global (1824) handleMessage OpenCV | GStreamer warning: Embedded video playback halted; module v4l2src0 reported: Failed to allocate required memory.
[ WARN:0] global (914) open OpenCV | GStreamer warning: unable to start pipeline
[ WARN:0] global (501) isPipelinePlaying OpenCV | GStreamer warning: GStreamer: pipeline have not been created


I need your request . Thank you.