When attempting a zypper dup I get a "nothing provides gstreamer" error



>>> zypper lr -P                                                                                                     ��� 
# | Alias                            | Name                       | Enabled |
GPG Check | Refresh | Priority
--+----------------------------------+----------------------------+---------+-----------+---------+---------
6 | packman                          | packman                    | Yes     |
(r ) Yes  | Yes     |   90    
1 | download.opensuse.org-non-oss    | Main Repository (NON-OSS)  | Yes     |
(r ) Yes  | Yes     |   99    
2 | download.opensuse.org-oss        | Main Repository (OSS)      | Yes     |
(r ) Yes  | Yes     |   99    
3 | download.opensuse.org-tumbleweed | Main Update Repository     | Yes     |
(r ) Yes  | Yes     |   99    
4 | dvd                              | dvd                        | No      |
----      | ----    |   99    
5 | openSUSE-20190925-0              | openSUSE-20190925-0        | Yes     |
(r ) Yes  | Yes     |   99    
7 | repo-debug                       | openSUSE-Tumbleweed-Debug  | No      |
----      | ----    |   99    
8 | repo-source                      | openSUSE-Tumbleweed-Source | No      |
----      | ----    |   99    


>>> sudo 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...
4 Problems:
Problem: nothing provides gstreamer >= 1.16.1 needed by
gstreamer-plugins-libav-1.16.1-43.1.i586
Problem: nothing provides gstreamer >= 1.16.1 needed by
gstreamer-plugins-ugly-1.16.1-4.1.i586
Problem: nothing provides gstreamer >= 1.16.1 needed by
gstreamer-plugins-ugly-1.16.1-4.1.x86_64
Problem: nothing provides gstreamer >= 1.16.1 needed by
gstreamer-plugins-ugly-1.16.1-4.1.i586

Problem: nothing provides gstreamer >= 1.16.1 needed by
gstreamer-plugins-libav-1.16.1-43.1.i586
 Solution 1: install gstreamer-plugins-libav-1.16.0-1.2.x86_64 (with vendor
change)
  http://packman.links2linux.de  -->  openSUSE
 Solution 2: keep obsolete gstreamer-plugins-libav-1.16.0-42.3.x86_64
 Solution 3: break gstreamer-plugins-libav-1.16.1-43.1.i586 by ignoring some of
its dependencies

Choose from above solutions by number or skip, retry or cancel
[1/2/3/s/r/c/d/?] (c): 


A bit of digging around leads me to a possibly missing RPM. Visiting
https://software.opensuse.org/package/gstreamer shows that 1.16.1 is available
but
https://download.opensuse.org/tumbleweed/repo/oss/x86_64/gstreamer-1.16.1-1.1.x86_64.rpm
returns a 404 error.