The last bit:
In file included from /usr/include/glib-2.0/glib/galloca.h:34,
from /usr/include/glib-2.0/glib.h:32,
from mpeg_edit.c:6:
/usr/include/glib-2.0/glib/gtypes.h:580:8: note: declared here
580 | struct _GTimeVal
| ^~~~~~~~~
In file included from /usr/include/gtk-2.0/gtk/gtktoolitem.h ...