@jonas Wow, thank you :). Will do so for sure.

@jonas Thank you, that was quick

I was inpatient so I did a numerus dumb thing before that. I broke half the system

I did what you proposed, here is the output:

localhost:/home/davor # zypper dup
Loading repository data...
Reading installed packages...
Warning: You are about to do a distribution upgrade with all enabled repositories. Make sure these repositories are compatible before you continue. See 'man zypper' for more information about this command.
Computing distribution upgrade...
Nothing to do.
localhost:/home/davor # zypper ref
Repository 'Google-Chrome' is up to date.                                       
Repository 'Packman' is up to date.                                             
Repository 'Main Repository (NON-OSS)' is up to date.                           
Repository 'Main Repository (DEBUG)' is up to date.                             
Repository 'Main Repository (Sources)' is up to date.                           
Repository 'Main Repository (OSS)' is up to date.                               
Repository 'Main Update Repository' is up to date.                              
Repository 'google-chrome' is up to date.                                       
Repository 'GNOME:Backports:Factory' is up to date.                             
Repository 'network' is up to date.                                             
Repository 'security' is up to date.                                            
Repository 'GNOME:Factory' is up to date.                                       
Repository 'multimedia:apps' is up to date.                                     
Repository 'multimedia:libs' is up to date.                                     
Repository 'home:cboxdoerfer' is up to date.                                    
Repository 'Java:Factory' is up to date.                                        
Repository 'home:derselbst:anmp' is up to date.                                 
Repository 'games:tools' is up to date.                                         
Repository 'hardware:razer' is up to date.                                      
Repository 'GNOME:Apps' is up to date.                                          
Retrieving repository 'games' metadata ...................................[done]
Building repository 'games' cache ........................................[done]
Repository 'openSUSE:Tumbleweed' is up to date.                                 
Repository 'home:KAMiKAZOW' is up to date.                                      
Repository 'Packman' is up to date.                                             
Repository 'skype (stable)' is up to date.                                      
Repository 'snappy' is up to date.                                              
All repositories have been refreshed.
localhost:/home/davor # zypper dup
Loading repository data...
Reading installed packages...
Warning: You are about to do a distribution upgrade with all enabled repositories. Make sure these repositories are compatible before you continue. See 'man zypper' for more information about this command.
Computing distribution upgrade...
Nothing to do.
localhost:/home/davor # zypper in libavcodec59
Loading repository data...
Reading installed packages...
'libavcodec59' is already installed.
There is an update candidate for 'libavcodec59' from vendor 'obs://build.opensuse.org/multimedia', while the current vendor is 'http://packman.links2linux.de'. Use 'zypper install libavcodec59-5.1.2-47.1.x86_64' to install this candidate.
There is an update candidate for 'libavcodec59', but it comes from a repository with a lower priority. Use 'zypper install libavcodec59-5.1.2-47.1.x86_64' to install this candidate.
Resolving package dependencies...
Nothing to do.
localhost:/home/davor # zypper verify
Loading repository data...
Reading installed packages...
Dependencies of all installed packages are satisfied.

Strawberry is up and running again, thank you for your support!

When I try to start Strawberry by clicking on the icon nothing is happening.
When I try to start it from the terminal I get the following:

davor@localhost:~> strawberry
strawberry: error while loading shared libraries: libavcodec.so.59: cannot open shared object file: No such file or directory

I think that I have all the libraries installed.

Any suggestions what I could try in order to resolve this problem?

This is my system: