Fix ffmpeg build

ffmpeg/Makefile

 	sudo apt-get install -y yasm
 	sudo apt-get install -y nasm # apparently x264 switched to this
 
-	mkdir x264_out
-	mkdir ffmpeg_out
+	mkdir -p x264_out
+	mkdir -p ffmpeg_out
+
+	cp -prv 5.1-0004-fix-binutils.patch ffmpeg/
 
 	pushd x264 && \
 	git checkout 2451a7282463f68e532f2eee090a70ab139bb3e7
 	pushd ffmpeg && git checkout n3.1
 	#git checkout 71052d85c16bd65fa1e3e01d9040f9a3925efd7a # or my muxing code won't work, they've modified the example since fba1592f35501bff0f28d7885f4128dfc7b82777
 	pushd ffmpeg && \
-		./configure --cxx=$$(which c++) --enable-static --enable-shared --enable-libx264 --enable-gpl --disable-swresample --prefix=$$(realpath $$PWD/../ffmpeg_out) && \
+	    ./configure --cxx=$$(which c++) --enable-static --enable-shared --enable-libx264 --enable-gpl --disable-swresample --prefix=$$(realpath $$PWD/../ffmpeg_out) && \
 	    sed -i.bak 's/HAVE_ARC4RANDOM 1/HAVE_ARC4RANDOM 0/g' ./config.h && \
-		make -j $$(nproc) && \
+		patch libavcodec/x86/mathops.h 5.1-0004-fix-binutils.patch && \
+	    make -j $$(nproc) && \
 	make install
 
 package-ubuntu1804:
 	rm -rf ffmpeg_out
 
 shell:
-	FLAGS="-i --privileged" bash ../ubuntu1804.sh /bin/bash
+	FLAGS="-i --privileged" bash ../ubuntu2404.sh /bin/bash