Install ffmpeg-mux in /usr/lib/...

debian/patches/0003-override-path.patch

@@ -0,0 +1,19 @@
+Description: Override path for ffmpeg-mux
+Author: Sebastian Ramacher <sramacher@debian.org>
+Forwarded: not-needed
+Last-Update: 2016-02-24
+
+--- a/plugins/obs-ffmpeg/obs-ffmpeg-mux.c
++++ b/plugins/obs-ffmpeg/obs-ffmpeg-mux.c
+@@ -175,7 +175,11 @@
+ 		num_tracks++;
+ 	}
+ 
++#ifdef FFMPEG_MUX_FIXED
++	dstr_init_copy(cmd, FFMPEG_MUX_FIXED);
++#else
+ 	dstr_init_move_array(cmd, obs_module_file(FFMPEG_MUX));
++#endif
+ 	dstr_insert_ch(cmd, 0, '\"');
+ 	dstr_cat(cmd, "\" \"");
+ 	dstr_cat_dstr(cmd, &stream->path);

debian/patches/series

@@ -1,2 +1,3 @@
 0001-Use-common-license.patch
 0002-Buildsystem.patch
+0003-override-path.patch