mehdi@MPourhadi ~/D/G/O/S/Fusion> sudo apt-add-repository ppa:strukturag/libde265
[sudo] password for mehdi: 
Cannot add PPA: 'ppa:strukturag/libde265'.
Please check that the PPA name or format is correct.
mehdi@MPourhadi ~/D/G/O/S/Fusion> sudo apt-add-repository ppa:strukturag/libde265
 libde265 is an open source implementation of the h.265 video codec. It is written from scratch and has a plain C API to enable a simple integration into other software.

libde265 supports WPP and tile-based multithreading and includes SSE optimizations. The decoder includes all features of the Main profile and correctly decodes almost all conformance streams.

libde265 is released under the LGPL, further information are available at
http://www.libde265.org
https://github.com/strukturag/libde265

This PPA contains Ubuntu packages of the libde265 library, plugins for
the GStreamer framework, VLC and required dependencies.

The GStreamer plugin source is available at
https://github.com/strukturag/gstreamer-libde265

The VLC plugin source is available at
https://github.com/strukturag/vlc-libde265

You can get sample Matroska streams from
http://www.libde265.org/downloads-videos/
http://www.divx.com/de/hevc
http://labs.divx.com/node/127909
 More info: https://launchpad.net/~strukturag/+archive/ubuntu/libde265
Press [ENTER] to continue or ctrl-c to cancel adding it

gpg: keyring `/tmp/tmprecqt2vr/secring.gpg' created
gpg: keyring `/tmp/tmprecqt2vr/pubring.gpg' created
gpg: requesting key 705C2B92 from hkp server keyserver.ubuntu.com
gpg: /tmp/tmprecqt2vr/trustdb.gpg: trustdb created
gpg: key 705C2B92: public key "Launchpad PPA for struktur AG" imported
gpg: Total number processed: 1
gpg:               imported: 1  (RSA: 1)
OK