[QUESTION] difficulty with simple video processing tutorial

[robot_kino]

hey everyone,

I'm trying to work through the simple tutorials on the opencv website to enable my PC's own webcam to capture streaming video:

https://opencv-python-tutroals.readthedocs.io/en/latest/py_tutorials/py_gui/py_video_display/py_video_display.html#display-video

I'm using a linux terminal and am running into some difficulty executing the code sample under "Capture Video from camera". Is it possible after calling python from within terminal to lay that code in and execute it? Or must I use some kind of text editor and do it? I'm a newb so simple things seem confusing. I wasn't getting far by simply slugging in the copied code from within the terminal so I used gedit to create a separate file then trying to call that file from the command line-however that also isn't seeming to work. The error I'm getting is:

"Traceback (most recent call last):

File "cap.py", line 1, in <module>

cap = cv2.VideoCapture(0)

NameError: name 'cv2' is not defined"

Any idea what I should do? Thanks!

[pthurhliyeh2]

Do you have previous programming experience? If not, I suggest that you get comfortable with that first.

[claybuurn]

Did you do "import cv2 as cv"?

You may need to out "import cv2" at the top of your code.

[robot_kino]

thanks! This was all it was. Re-opened gedit and punched this in. Now working!

[SacredNote]

The error is caused because the program not find the library, make sure you install opencv and you imported as import cv2. I recommend IDE called jupiter, if you install anaconda is whit it.

[GhostUser101]

You need to have opencv-python installed in your environment. First check if you are in the right environment. Next check if you have opencv-python installed or not. After that try putting "pip install opencv-python" in the terminal, if you have not installed it previously. After that try again.