build1.sh

# FFmpeg config args:

# Base CONFIG_ARGS
--target-os=none        # use none to prevent any os specific configurations
--arch=x86_32           # use x86_32 to achieve minimal architectural optimization
--enable-cross-compile  # enable cross compile
--disable-x86asm        # disable x86 asm
--disable-inline-asm    # disable inline asm
--disable-stripping     # disable stripping
--disable-programs      # disable programs build (incl. ffplay, ffprobe & ffmpeg)
--disable-doc           # disable doc
--disable-debug         # disable debug info, required by closure
--disable-runtime-cpudetect   # disable runtime cpu detect
--disable-autodetect    # disable external libraries auto detect
--extra-cflags="$CFLAGS"
--extra-cxxflags="$CFLAGS"
--extra-ldflags="$LDFLAGS"
--pkg-config-flags="--static"
--nm="llvm-nm"
--ar=emar
--ranlib=emranlib
--cc=emcc
--cxx=em++
--objcc=emcc
--dep-cc=emcc

--disable-asm
--disable-fast-unaligned
--disable-all
--disable-network
--disable-d3d11va
--disable-dxva2
--disable-vaapi
--disable-vdpau
--disable-bzlib
--disable-iconv
--disable-libxcb
--disable-lzma
--disable-securetransport
--disable-xlib
--disable-zlib
--enable-bsf=h264_mp4toannexb
--enable-ffmpeg
--enable-avcodec
--enable-avformat
--enable-avutil
--enable-swresample
--enable-swscale
--enable-avfilter
--enable-libx264
--enable-gpl

--enable-encoder=libx264,mpeg4,mov,gif,h264
--enable-decoder=rawvideo,hevc,h264,mpeg4,gif
--enable-parser=mpeg4video,mpegaudio,gif
--enable-demuxer=mov,gif,concat,image2,image2pipe,mpegps
--enable-muxer=mp4,gif,mov
--enable-protocol=file
--enable-filter=scale,overlay,fps,movie



# emcc args:
-o wasm/dist/ffmpeg-core.js fftools/ffmpeg_opt.c fftools/ffmpeg_filter.c fftools/ffmpeg_hw.c fftools/cmdutils.c fftools/ffmpeg.c # output
# -lavdevice
-lavfilter -lavformat -lavcodec
# -lswresample