RUN apt-get update ##[edited]运行 apt-get install ffmpeg libsm6 libxext6 -y

将这些行添加到您的 Dockerfile

i am trying to run cv2, and when i try to import it i get

ImportError: libGL.so.1: cannot open shared object file: No such file or directory

the suggested solution online is installing

apt install libgl1-mesa-glx

but this is already installed and the latest version.Any help would be really helpful.Thanks in advance.

RUN apt-get update ##[edited]
RUN apt-get install ffmpeg libsm6 libxext6  -y

Add these lines to your Dockerfile