gstreamer not working

Somehow using installing ros seems to screw up PKG_CONFIG_PATH and it returns only /opt/ros/noetic/lib/pkgconfig

And if I try

gst-inspect-1.0

It will return almost nothing.

Manage to find the path back with

pkg-config --variable pc_path pkg-config

So adding

export PKG_CONFIG_PATH=`pkg-config --variable pc_path pkg-config`:$PKG_CONFIG_PATH

to .bashrc will do the trick.

Now

gst-launch-1.0 playbin uri=file:///path/to/video

will play video faultlessly.

Remark: Be sure to conda deactivate if Anaconda was installed.