I have this warning when am trying to run my python code in linux. How can I fix it?

  c++, opencv, python
[ WARN:0] global ./modules/videoio/src/cap_gstreamer.cpp (2056) handleMessage OpenCV | GStreamer warning: Embedded video playback halted; module v4l2src0 reported: Failed to allocate required memory.
[ WARN:0] global ./modules/videoio/src/cap_gstreamer.cpp (1034) open OpenCV | GStreamer warning: unable to start pipeline
[ WARN:0] global ./modules/videoio/src/cap_gstreamer.cpp (597) isPipelinePlaying OpenCV | GStreamer warning: GStreamer: pipeline have not been created
Traceback (most recent call last):
  File "/home/kali/Desktop/police_project/wanted_criminal.py", line 37, in <module>
    small_frame = cv2.resize(frame, (0, 0), fx=0.25, fy=0.25)
cv2.error: OpenCV(4.5.3) ./modules/imgproc/src/resize.cpp:4051: error: (-215:Assertion failed) !ssize.empty() in function 'resize'

free(): invalid pointer
zsh: abort      python3 wanted_criminal.py

Source: Python Questions

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