Not a blocker but should be fixed:

BuildRequires:  libmpg123-devel


but in bug #1394147, the package actually creates mpg123-libs-devel. That subpackage provides libmpg123-devel, so it works, but that's kind of ugly I think.

This doesn't built for me -- fails with 

RPM build errors:
    File not found: /home/mattdm/rpmbuild/BUILDROOT/gstreamer1-plugin-mpg123-1.10.0-1.fc25.mattdm.x86_64/usr/lib64/gstreamer-1.0/libgstmpg123.so


... which file seems to actually have landed at 

/home/mattdm/rpmbuild/BUILDROOT/gstreamer1-plugin-mpg123-1.10.0-1.fc25.mattdm.x86_64/usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstmpg123.so

-- that is, it's in 

   /usr/lib/x86_64-linux-gnu/gstreamer-1.0/

rather than

   /usr/lib64/gstreamer-1.0/

as expected.

(Building as me in F25.)

I'm not an expert in how gstreamer1 plugins work, but looks like maybe the "ninja-build" thing doesn't know about Fedora filesystem conventions.

Updated files:

https://people.freedesktop.org/~wtay/SPECS/gstreamer1-plugin-mpg123.spec
https://people.freedesktop.org/~wtay/SRPMS/gstreamer1-plugin-mpg123-1.10.0-2.fc24.src.rpm

It installs in the right place for me. I have:

meson.noarch                 0.35.0-3.fc24                  @updates
ninja-build.x86_64           1.7.1-3.fc24                   @updates

Still not working for me. I get 

+ ninja-build -v install
[0/1] '/usr/bin/python3' '/usr/bin/meson' '--internal' 'install' '/home/mattdm/rpmbuild/BUILD/gst-plugin-mpg123-1.10.0/rpmbuilddir/meson-private/install.dat'
Installing ext/mpg123/libgstmpg123.so to /home/mattdm/rpmbuild/BUILDROOT/gstreamer1-plugin-mpg123-1.10.0-2.fc25.mattdm.x86_64/usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstmpg123.so


I have 

  meson-0.35.1-1.fc25.noarch
  ninja-build-1.7.1-3.fc25.x86_64

Okay, builds fine in mock. Must be something weird in my local environment.

Everything else looks good.

Package request has been approved: https://admin.fedoraproject.org/pkgdb/package/rpms/gstreamer1-plugin-mpg123

Are there any other parts of gst-plugins-ugly which we can include as a (slightly) more complete gstreamer1-plugins-ugly-free?

There are five plugins under gst/ with actual code:

* asfdemux: demuxer for Microsoft's Advanced Streaming Format
* dvdlpcmdec: Decode DVD LPCM frames into standard PCM
* dvdsub: DVD subtitle parser and decoder
* realmedia: RealMedia support
* xingmux: add Xing tags to MP3 files

And the following plugins under ext/ which just wrap other libraries which are, or could be, in Fedora:

* cdio: read CD audio with libcdio (which is free but GPL)
* dvdread: access DVDs with libdvdread (which is free but GPL; note that there is another plugin already in gstreamer1-plugins-bad-free which uses libdvd{nav,read})
* mad: MP3 decoding with libmad (not yet in Fedora, but should be acceptable as a MP3 decoder; license is GPL)

There are others, but their dependent libraries are not in Fedora for legal reasons, or just obsolete (namely, libsidplay).  Precedence is that ext/ plugins need not be removed from the tarballs even if they wrap unacceptable libraries, since they are just wrappers.

gstreamer1-plugin-mpg123 is in.  Opened a separate bug for a possible -ugly-free.