--- mplayer-210815.old/ffmpeg/libavformat/Makefile
+++ mplayer-210815/ffmpeg/libavformat/Makefile
@@ -608,7 +608,6 @@
 OBJS-$(CONFIG_LIBGME_DEMUXER)            += libgme.o
 OBJS-$(CONFIG_LIBMODPLUG_DEMUXER)        += libmodplug.o
 OBJS-$(CONFIG_LIBOPENMPT_DEMUXER)        += libopenmpt.o
-OBJS-$(CONFIG_VAPOURSYNTH_DEMUXER)       += vapoursynth.o
 
 # protocols I/O
 OBJS-$(CONFIG_ASYNC_PROTOCOL)            += async.o
--- mplayer-210815.old/ffmpeg/libavformat/allformats.c
+++ mplayer-210815/ffmpeg/libavformat/allformats.c
@@ -528,7 +528,6 @@
 extern const AVInputFormat  ff_libgme_demuxer;
 extern const AVInputFormat  ff_libmodplug_demuxer;
 extern const AVInputFormat  ff_libopenmpt_demuxer;
-extern const AVInputFormat  ff_vapoursynth_demuxer;
 
 #include "libavformat/muxer_list.c"
 #include "libavformat/demuxer_list.c"