Comment # 2 on bug 1110339 from Dave Plater

I'm assuming that it isn't xine-list-1.2 that is changing with every build. I
found a patch from the end of January lurking in my local build directory
called reproducible.patch it had one change in misc/desktops/Makefile.am :
--- misc/desktops/Makefile.am.orig      2017-12-28 18:34:15.000000000 +0200
+++ misc/desktops/Makefile.am   2018-10-03 12:25:03.678527099 +0200
@@ -30,7 +30,7 @@ desktop_DATA = xine.desktop
 INPUT_MIME_TYPES =
x-content/audio-cdda;x-content/video-dvd;x-content/video-svcd;x-content/video-vcd;

 if XINE_LIST
-xine.desktop: xine.desktop.in @XINE_LIST@
+xine.desktop: xine.desktop.in @XINE_LIST@;
        $(AM_V_GEN)cat $< > $@; \
        @XINE_LIST@ | perl -ne 'print join(";",sort(split(";")))' >> $@; \
        echo ';$(INPUT_MIME_TYPES)' >> $@

Don't know if the ; semicolon could cause this.
You can find builds in:
https://build.opensuse.org/package/show/home:plater/xine-ui
and
https://pmbs.links2linux.de/package/show/home:davepl/xine-ui
but I've removed the SUSE specific crippling code because mpeg2video is no
longer patent encumbered.
I've tested this locally and can't get a difference.
I've also found 3 xine.desktopx files in my obs xine-ui directory that are
identical to the one produced by home:davepl (Packman) xine-ui so I think that
I fixed this long ago and something big distracted me.