I have the same problem on Linux Mint 11 64-bits (Ubuntu 11.10 based). I'm using PiTiVi 0.15.0, from it's PPA.
I have also installed frei0r-plugins, and as suggested on their website, gnome-video-effects, which is not available on Ubuntu's repositories, I had to get it from Debian's repos. terminal output: bruno@bruno-desktop ~ $ pitivi ERROR: Could not load classifier cascade /usr/share/opencv/haarcascades/haarcascade_frontalface_alt2.xml ERROR: Could not load classifier cascade /usr/share/opencv/haarcascades/haarcascade_frontalface_alt2.xml bruno@bruno-desktop ~ $ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/878075 Title: pitivi has no effects To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pitivi/+bug/878075/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs