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Gtk-Message: Failed to load module “canberra-gtk-module”

Running opencv CPP program is the above error

Using debain 8 system, search on the Internet, the solution is: sudo apt get install libcanberra-gtk3-module, the system has installed this module

Inspired by the above scheme, run the command, including the package without module:

yuanzhen@bogon :~/C_ script$ apt-cache search canberra-gtk-module
libcanberra-gtk-module – translates GTK+ widgets signals to event sounds
libcanberra-gtk-module-dbg – libcanberra GtkModule detached debugging symbols

Then install the package:

sudo apt-get install libcanberra-gtk-module

Problem solved