diff --git a/.github/workflows/descript-build.yml b/.github/workflows/descript-build.yml
new file mode 100644
index 00000000..b2375742
--- /dev/null
+++ b/.github/workflows/descript-build.yml
@@ -0,0 +1,27 @@
+name: build shared-libs for Descript
+
+on:
+  push:
+    paths-ignore:
+      - '*.md'
+  pull_request:
+    branches: 
+      - charles/arm64
+      - sk/ffmpeg-4.4-arm64
+
+jobs:
+  build-macos-shared:
+    name: ffmpeg-ffprobe-shared-darwin
+    runs-on: macos-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: setup python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.8 #install the python needed
+      
+      - name: build-ffmpeg-descript.py
+        run: |
+          python ./descript/build-ffmpeg-descript.py
diff --git a/.gitignore b/.gitignore
index 4725dcff..e2053e2a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,4 @@ workspace
 .idea
 linux
 .artifacts
+.DS_Store
diff --git a/build-ffmpeg b/build-ffmpeg
index 1839e4c0..b3e86363 100755
--- a/build-ffmpeg
+++ b/build-ffmpeg
@@ -5,7 +5,7 @@
 
 PROGNAME=$(basename "$0")
 FFMPEG_VERSION=4.4
-SCRIPT_VERSION=1.33
+SCRIPT_VERSION=1.40.rc.1
 CWD=$(pwd)
 PACKAGES="$CWD/packages"
 WORKSPACE="$CWD/workspace"
@@ -17,6 +17,8 @@ MACOS_M1=false
 CONFIGURE_OPTIONS=()
 NONFREE_AND_GPL=false
 LATEST=false
+SHARED_LIBRARIES=false
+FREE_AND_GPL=false
 
 # Check for Apple Silicon
 if [[ ("$(uname -m)" == "arm64") && ("$OSTYPE" == "darwin"*) ]]; then
@@ -207,6 +209,8 @@ usage() {
   echo "      --latest                   Build latest version of dependencies if newer available"
   echo "      --full-static              Build a full static FFmpeg binary (eg. glibc, pthreads etc...) **only Linux**"
   echo "                                 Note: Because of the NSS (Name Service Switch), glibc does not recommend static links."
+  echo "      --full-shared              Build all shared libraries. Cannot be used with --full-static"
+  echo "      --enable-gpl-and-free      Enable GPL but not non-free codecs. Cannot be used with --enable-gpl-and-non-free - https://ffmpeg.org/legal.html"
   echo ""
 }
 
@@ -247,6 +251,13 @@ while (($# > 0)); do
     if [[ "$1" == "--latest" ]]; then
       LATEST=true
     fi
+    if [[ "$1" == "--full-shared" ]]; then
+      SHARED_LIBRARIES=true
+    fi
+    if [[ "$1" == "--enable-gpl-and-free" ]]; then
+      CONFIGURE_OPTIONS+=("--enable-gpl")
+      FREE_AND_GPL=true
+    fi
     shift
     ;;
   *)
@@ -264,6 +275,16 @@ if [ -z "$bflag" ]; then
   exit 0
 fi
 
+if [[ ($SHARED_LIBRARIES == true) && ($LDEXEFLAGS == true) ]]; then
+  usage
+  exit 1
+fi
+
+if [[ ($NONFREE_AND_GPL == true) && ($FREE_AND_GPL == true) ]]; then
+  usage
+  exit 1
+fi
+
 echo "Using $MJOBS make jobs simultaneously."
 
 if $NONFREE_AND_GPL; then
@@ -274,6 +295,14 @@ if [ -n "$LDEXEFLAGS" ]; then
   echo "Start the build in full static mode."
 fi
 
+if $SHARED_LIBRARIES; then
+  echo "Building shared libraries."
+fi
+
+if $FREE_AND_GPL; then
+  echo "GPL and free codecs"
+fi
+
 mkdir -p "$PACKAGES"
 mkdir -p "$WORKSPACE"
 
@@ -315,7 +344,10 @@ if build "giflib" "5.2.1"; then
       download "https://sourceforge.net/p/giflib/bugs/_discuss/thread/4e811ad29b/c323/attachment/Makefile.patch"
       execute patch "${PACKAGES}/giflib-5.2.1/Makefile" ${PACKAGES}/Makefile.patch""
     fi
-  execute make -j $MJOBS
+  # Descript: compilation will fail with more than 8 jobs, so
+  # force to not run in parallel
+  #execute make -j $MJOBS
+  execute make
   execute make PREFIX="${WORKSPACE}" install
   build_done "giflib" "5.2.1"
 fi
@@ -338,18 +370,26 @@ fi
 
 if build "nasm" "2.15.05"; then
   download "https://www.nasm.us/pub/nasm/releasebuilds/2.15.05/nasm-2.15.05.tar.xz"
-  execute ./configure --prefix="${WORKSPACE}" --disable-shared --enable-static
+  if $SHARED_LIBRARIES; then
+    execute ./configure --prefix="${WORKSPACE}" --enable-shared --disable-static
+  else
+    execute ./configure --prefix="${WORKSPACE}" --disable-shared --enable-static
+  fi
   execute make -j $MJOBS
   execute make install
   build_done "nasm" "2.15.05"
 fi
 
-if build "zlib" "1.2.11"; then
-  download "https://www.zlib.net/zlib-1.2.11.tar.gz"
-  execute ./configure --static --prefix="${WORKSPACE}"
+if build "zlib" "1.3"; then
+  download "https://www.zlib.net/zlib-1.3.tar.gz"
+  if $SHARED_LIBRARIES; then
+    execute ./configure --shared --prefix="${WORKSPACE}"
+  else
+    execute ./configure --static --prefix="${WORKSPACE}"
+  fi
   execute make -j $MJOBS
   execute make install
-  build_done "zlib" "1.2.11"
+  build_done "zlib" "1.3"
 fi
 
 if build "m4" "1.4.19"; then
@@ -378,7 +418,11 @@ fi
 
 if build "libtool" "2.4.6"; then
   download "https://ftpmirror.gnu.org/libtool/libtool-2.4.6.tar.gz"
-  execute ./configure --prefix="${WORKSPACE}" --enable-static --disable-shared
+  if $SHARED_LIBRARIES; then
+    execute ./configure --prefix="${WORKSPACE}" --disable-static --enable-shared
+  else
+    execute ./configure --prefix="${WORKSPACE}" --enable-static --disable-shared
+  fi
   execute make -j $MJOBS
   execute make install
   build_done "libtool" "2.4.6"
@@ -427,12 +471,26 @@ if command_exists "python3"; then
     if build "dav1d" "0.9.2"; then
       download "https://code.videolan.org/videolan/dav1d/-/archive/0.9.2/dav1d-0.9.2.tar.gz"
       make_dir build
-      execute meson build --prefix="${WORKSPACE}" --buildtype=release --default-library=static --libdir="${WORKSPACE}"/lib
+      # [ Descript - cvanwink ] 
+      # Set extra CFLAGS for arm64
+      # https://github.com/markus-perl/ffmpeg-build-script/issues/115
+      if $MACOS_M1; then
+        export CFLAGS="-arch arm64"
+      fi
+      if $SHARED_LIBRARIES; then
+        execute meson build --prefix="${WORKSPACE}" --buildtype=release --default-library=shared --libdir="${WORKSPACE}"/lib
+      else
+        execute meson build --prefix="${WORKSPACE}" --buildtype=release --default-library=static --libdir="${WORKSPACE}"/lib
+      fi
       execute ninja -C build
       execute ninja -C build install
+      # [ Descript - cvanwink ]
+      # Restore default CFLAGS from line 12
+      if $MACOS_M1; then
+        CFLAGS="-I$WORKSPACE/include"
+      fi
       build_done "dav1d" "0.9.2"
     fi
-    CONFIGURE_OPTIONS+=("--enable-libdav1d")
   fi
 fi
 
@@ -442,7 +500,11 @@ if ! $MACOS_M1; then
     # Last known working commit which passed CI Tests from HEAD branch
     download "https://gitlab.com/AOMediaCodec/SVT-AV1/-/archive/1a3e32b8fdc4abf5c093ee01dfa82803afc75fb4/SVT-AV1-1a3e32b8fdc4abf5c093ee01dfa82803afc75fb4.tar.gz" "svtav1-1a3e32b.tar.gz"
     cd "${PACKAGES}"/svtav1-1a3e32b/Build/linux || exit
-    execute cmake -DCMAKE_INSTALL_PREFIX="${WORKSPACE}" -DENABLE_SHARED=off -DBUILD_SHARED_LIBS=OFF ../.. -G"Unix Makefiles" -DCMAKE_BUILD_TYPE=Release
+    if $SHARED_LIBRARIES; then
+      execute cmake -DCMAKE_INSTALL_PREFIX="${WORKSPACE}" -DENABLE_SHARED=on -DBUILD_SHARED_LIBS=ON ../.. -G"Unix Makefiles" -DCMAKE_BUILD_TYPE=Release
+    else
+      execute cmake -DCMAKE_INSTALL_PREFIX="${WORKSPACE}" -DENABLE_SHARED=off -DBUILD_SHARED_LIBS=OFF ../.. -G"Unix Makefiles" -DCMAKE_BUILD_TYPE=Release
+    fi
     execute make -j $MJOBS
     execute make install
     execute cp SvtAv1Enc.pc "${WORKSPACE}/lib/pkgconfig/"
@@ -453,60 +515,76 @@ if ! $MACOS_M1; then
 fi
 
 if command_exists "cargo"; then
-  if build "rav1e" "0.5.0-beta"; then
+  if build "rav1e" "0.6.6"; then
     execute cargo install cargo-c
-    download "https://github.com/xiph/rav1e/archive/refs/tags/v0.5.0-beta.tar.gz"
+    download "https://github.com/xiph/rav1e/archive/refs/tags/v0.6.6.tar.gz"
     execute cargo cinstall --prefix="${WORKSPACE}" --library-type=staticlib --crt-static --release
-    build_done "rav1e" "0.5.0-beta"
+    build_done "rav1e" "0.6.6"
   fi
   CONFIGURE_OPTIONS+=("--enable-librav1e")
 fi
 
-if $NONFREE_AND_GPL; then
+if $NONFREE_AND_GPL || $FREE_AND_GPL; then
 
   if build "x264" "5db6aa6"; then
     download "https://code.videolan.org/videolan/x264/-/archive/5db6aa6cab1b146e07b60cc1736a01f21da01154/x264-5db6aa6cab1b146e07b60cc1736a01f21da01154.tar.gz" "x264-5db6aa6.tar.gz"
     cd "${PACKAGES}"/x264-5db6aa6 || exit
 
     if [[ "$OSTYPE" == "linux-gnu" ]]; then
-      execute ./configure --prefix="${WORKSPACE}" --enable-static --enable-pic CXXFLAGS="-fPIC"
+      if $SHARED_LIBRARIES; then
+        execute ./configure --prefix="${WORKSPACE}" --enable-shared --enable-pic CXXFLAGS="-fPIC"
+      else
+        execute ./configure --prefix="${WORKSPACE}" --enable-static --enable-pic CXXFLAGS="-fPIC"
+      fi
     else
-      execute ./configure --prefix="${WORKSPACE}" --enable-static --enable-pic
+      if $SHARED_LIBRARIES; then
+        execute ./configure --prefix="${WORKSPACE}" --enable-shared --enable-pic
+      else
+        execute ./configure --prefix="${WORKSPACE}" --enable-static --enable-pic
+      fi
     fi
 
     execute make -j $MJOBS
     execute make install
-    execute make install-lib-static
+    if $SHARED_LIBRARIES; then
+      execute make install-lib-shared
+    else
+      execute make install-lib-static
+    fi
 
     build_done "x264" "5db6aa6"
   fi
   CONFIGURE_OPTIONS+=("--enable-libx264")
 fi
 
-if $NONFREE_AND_GPL; then
+if $NONFREE_AND_GPL || $FREE_AND_GPL; then
   if build "x265" "3.5"; then
     download "https://github.com/videolan/x265/archive/Release_3.5.tar.gz" "x265-3.5.tar.gz" # This is actually 3.4 if looking at x265Version.txt
     cd build/linux || exit
-    rm -rf 8bit 10bit 12bit 2>/dev/null
-    mkdir -p 8bit 10bit 12bit
-    cd 12bit || exit
-    execute cmake ../../../source -DCMAKE_INSTALL_PREFIX="${WORKSPACE}" -DENABLE_SHARED=OFF -DBUILD_SHARED_LIBS=OFF -DHIGH_BIT_DEPTH=ON -DENABLE_HDR10_PLUS=ON -DEXPORT_C_API=OFF -DENABLE_CLI=OFF -DMAIN12=ON
-    execute make -j $MJOBS
-    cd ../10bit || exit
-    execute cmake ../../../source -DCMAKE_INSTALL_PREFIX="${WORKSPACE}" -DENABLE_SHARED=OFF -DBUILD_SHARED_LIBS=OFF -DHIGH_BIT_DEPTH=ON -DENABLE_HDR10_PLUS=ON -DEXPORT_C_API=OFF -DENABLE_CLI=OFF
-    execute make -j $MJOBS
-    cd ../8bit || exit
-    ln -sf ../10bit/libx265.a libx265_main10.a
-    ln -sf ../12bit/libx265.a libx265_main12.a
-    execute cmake ../../../source -DCMAKE_INSTALL_PREFIX="${WORKSPACE}" -DENABLE_SHARED=OFF -DBUILD_SHARED_LIBS=OFF -DEXTRA_LIB="x265_main10.a;x265_main12.a;-ldl" -DEXTRA_LINK_FLAGS=-L. -DLINKED_10BIT=ON -DLINKED_12BIT=ON
-    execute make -j $MJOBS
-
-    mv libx265.a libx265_main.a
-
-    if [[ "$OSTYPE" == "darwin"* ]]; then
-      execute "${MACOS_LIBTOOL}" -static -o libx265.a libx265_main.a libx265_main10.a libx265_main12.a 2>/dev/null
+    if $SHARED_LIBRARIES; then
+      execute cmake -DCMAKE_INSTALL_PREFIX="${WORKSPACE}" -DENABLE_SHARED=on -DBUILD_SHARED_LIBS=on ../../source
+      execute make -j $MJOBS
     else
-      execute ar -M <<EOF
+      rm -rf 8bit 10bit 12bit 2>/dev/null
+      mkdir -p 8bit 10bit 12bit
+      cd 12bit || exit
+      execute cmake ../../../source -DCMAKE_INSTALL_PREFIX="${WORKSPACE}" -DENABLE_SHARED=OFF -DBUILD_SHARED_LIBS=OFF -DHIGH_BIT_DEPTH=ON -DENABLE_HDR10_PLUS=ON -DEXPORT_C_API=OFF -DENABLE_CLI=OFF -DMAIN12=ON
+      execute make -j $MJOBS
+      cd ../10bit || exit
+      execute cmake ../../../source -DCMAKE_INSTALL_PREFIX="${WORKSPACE}" -DENABLE_SHARED=OFF -DBUILD_SHARED_LIBS=OFF -DHIGH_BIT_DEPTH=ON -DENABLE_HDR10_PLUS=ON -DEXPORT_C_API=OFF -DENABLE_CLI=OFF
+      execute make -j $MJOBS
+      cd ../8bit || exit
+      ln -sf ../10bit/libx265.a libx265_main10.a
+      ln -sf ../12bit/libx265.a libx265_main12.a
+      execute cmake ../../../source -DCMAKE_INSTALL_PREFIX="${WORKSPACE}" -DENABLE_SHARED=OFF -DBUILD_SHARED_LIBS=OFF -DEXTRA_LIB="x265_main10.a;x265_main12.a;-ldl" -DEXTRA_LINK_FLAGS=-L. -DLINKED_10BIT=ON -DLINKED_12BIT=ON
+      execute make -j $MJOBS
+
+      mv libx265.a libx265_main.a
+
+      if [[ "$OSTYPE" == "darwin"* ]]; then
+        execute "${MACOS_LIBTOOL}" -static -o libx265.a libx265_main.a libx265_main10.a libx265_main12.a 2>/dev/null
+      else
+        execute ar -M <<EOF
 CREATE libx265.a
 ADDLIB libx265_main.a
 ADDLIB libx265_main10.a
@@ -514,8 +592,8 @@ ADDLIB libx265_main12.a
 SAVE
 END
 EOF
+      fi
     fi
-
     execute make install
 
     if [ -n "$LDEXEFLAGS" ]; then
@@ -527,28 +605,41 @@ EOF
   CONFIGURE_OPTIONS+=("--enable-libx265")
 fi
 
-if build "libvpx" "1.10.0"; then
-  download "https://github.com/webmproject/libvpx/archive/refs/tags/v1.10.0.tar.gz" "libvpx-1.10.0.tar.gz"
+# [ Descript - cvanwink ]
+# Disable libvpx on arm64 and x86_64 as it doesn't link properly
+# with the .so files - will revisit after end-to-end is working
+if false; then
+  if build "libvpx" "1.10.0"; then
+    download "https://github.com/webmproject/libvpx/archive/refs/tags/v1.10.0.tar.gz" "libvpx-1.10.0.tar.gz"
 
-  if [[ "$OSTYPE" == "darwin"* ]]; then
-    echo "Applying Darwin patch"
-    sed "s/,--version-script//g" build/make/Makefile >build/make/Makefile.patched
-    sed "s/-Wl,--no-undefined -Wl,-soname/-Wl,-undefined,error -Wl,-install_name/g" build/make/Makefile.patched >build/make/Makefile
-  fi
+    if [[ "$OSTYPE" == "darwin"* ]]; then
+      echo "Applying Darwin patch"
+      sed "s/,--version-script//g" build/make/Makefile >build/make/Makefile.patched
+      sed "s/-Wl,--no-undefined -Wl,-soname/-Wl,-undefined,error -Wl,-install_name/g" build/make/Makefile.patched >build/make/Makefile
+    fi
 
-  execute ./configure --prefix="${WORKSPACE}" --disable-unit-tests --disable-shared --as=yasm --enable-vp9-highbitdepth
-  execute make -j $MJOBS
-  execute make install
+    if $SHARED_LIBRARIES; then
+      execute ./configure --prefix="${WORKSPACE}" --disable-unit-tests --enable-shared --disable-static --as=yasm --enable-vp9-highbitdepth
+    else
+      execute ./configure --prefix="${WORKSPACE}" --disable-unit-tests --disable-shared --as=yasm --enable-vp9-highbitdepth
+    fi
+    execute make -j $MJOBS
+    execute make install
 
-  build_done "libvpx" "1.10.0"
+    build_done "libvpx" "1.10.0"
+  fi
+  CONFIGURE_OPTIONS+=("--enable-libvpx")
 fi
-CONFIGURE_OPTIONS+=("--enable-libvpx")
 
-if $NONFREE_AND_GPL; then
+if $NONFREE_AND_GPL || $FREE_AND_GPL; then
   if build "xvidcore" "1.3.7"; then
     download "https://downloads.xvid.com/downloads/xvidcore-1.3.7.tar.gz"
     cd build/generic || exit
-    execute ./configure --prefix="${WORKSPACE}" --disable-shared --enable-static
+    if $SHARED_LIBRARIES; then
+      execute ./configure --prefix="${WORKSPACE}" --enable-shared --disable-static
+    else
+      execute ./configure --prefix="${WORKSPACE}" --disable-shared --enable-static
+    fi
     execute make -j $MJOBS
     execute make install
 
@@ -574,7 +665,11 @@ if $NONFREE_AND_GPL; then
       patch -p1 <fix_cmake_quoting.patch
     fi
 
-    execute cmake -DBUILD_SHARED_LIBS=OFF -DCMAKE_INSTALL_PREFIX="${WORKSPACE}" -DUSE_OMP=OFF -DENABLE_SHARED=off .
+    if $SHARED_LIBRARIES; then
+      execute cmake -DBUILD_SHARED_LIBS=ON -DCMAKE_INSTALL_PREFIX="${WORKSPACE}" -DUSE_OMP=OFF -DENABLE_SHARED=on .
+    else
+      execute cmake -DBUILD_SHARED_LIBS=OFF -DCMAKE_INSTALL_PREFIX="${WORKSPACE}" -DUSE_OMP=OFF -DENABLE_SHARED=off .
+    fi
     execute make
     execute make install
 
@@ -589,9 +684,17 @@ if build "av1" "ae2be80"; then
   make_dir "$PACKAGES"/aom_build
   cd "$PACKAGES"/aom_build || exit
   if $MACOS_M1; then
-    execute cmake -DENABLE_TESTS=0 -DCMAKE_INSTALL_PREFIX="${WORKSPACE}" -DCMAKE_INSTALL_LIBDIR=lib -DCONFIG_RUNTIME_CPU_DETECT=0 "$PACKAGES"/av1
+    if $SHARED_LIBRARIES; then
+      execute cmake -DENABLE_TESTS=0 -DEBUILD_SHARED_LIBS=1 -DCMAKE_INSTALL_PREFIX="${WORKSPACE}" -DCMAKE_INSTALL_LIBDIR=lib -DCONFIG_RUNTIME_CPU_DETECT=0 "$PACKAGES"/av1
+    else
+      execute cmake -DENABLE_TESTS=0 -DCMAKE_INSTALL_PREFIX="${WORKSPACE}" -DCMAKE_INSTALL_LIBDIR=lib -DCONFIG_RUNTIME_CPU_DETECT=0 "$PACKAGES"/av1
+    fi
   else
-    execute cmake -DENABLE_TESTS=0 -DCMAKE_INSTALL_PREFIX="${WORKSPACE}" -DCMAKE_INSTALL_LIBDIR=lib "$PACKAGES"/av1
+    if $SHARED_LIBRARIES; then
+      execute cmake -DENABLE_TESTS=0 -DEBUILD_SHARED_LIBS=1 -DCMAKE_INSTALL_PREFIX="${WORKSPACE}" -DCMAKE_INSTALL_LIBDIR=lib "$PACKAGES"/av1
+    else
+      execute cmake -DENABLE_TESTS=0 -DCMAKE_INSTALL_PREFIX="${WORKSPACE}" -DCMAKE_INSTALL_LIBDIR=lib "$PACKAGES"/av1
+    fi
   fi
   execute make -j $MJOBS
   execute make install
@@ -605,7 +708,11 @@ if build "zimg" "3.0.3"; then
   cd zimg-release-3.0.3 || exit
   execute "${WORKSPACE}/bin/libtoolize" -i -f -q
   execute ./autogen.sh --prefix="${WORKSPACE}"
-  execute ./configure --prefix="${WORKSPACE}" --enable-static --disable-shared
+  if $SHARED_LIBRARIES; then
+    execute ./configure --prefix="${WORKSPACE}" --disable-static --enable-shared
+  else
+    execute ./configure --prefix="${WORKSPACE}" --enable-static --disable-shared
+  fi
   execute make -j $MJOBS
   execute make install
   build_done "zimg" "3.0.3"
@@ -633,23 +740,36 @@ if command_exists "python3"; then
   if build "serd" "0.30.10"; then
     download "https://gitlab.com/drobilla/serd/-/archive/v0.30.10/serd-v0.30.10.tar.gz" "serd-v0.30.10.tar.gz"
     execute cp -r "${PACKAGES}"/autowaf/* "${PACKAGES}/serd-v0.30.10/waflib/"
-    execute ./waf configure --prefix="${WORKSPACE}" --static --no-shared --no-posix
+    if $SHARED_LIBRARIES; then
+      execute ./waf configure --prefix="${WORKSPACE}" --no-posix
+    else
+      execute ./waf configure --prefix="${WORKSPACE}" --static --no-shared --no-posix
+    fi
     execute ./waf
     execute ./waf install
     build_done "serd" "0.30.10"
   fi
   if build "pcre" "8.45"; then
     download "https://altushost-swe.dl.sourceforge.net/project/pcre/pcre/8.45/pcre-8.45.tar.gz" "pcre-8.45.tar.gz"
-    execute ./configure --prefix="${WORKSPACE}" --disable-shared --enable-static
+    if $SHARED_LIBRARIES; then
+      execute ./configure --prefix="${WORKSPACE}" --enable-shared --disable-static
+    else
+      execute ./configure --prefix="${WORKSPACE}" --disable-shared --enable-static
+    fi
     execute make -j $MJOBS
     execute make install
 
     build_done "pcre" "8.45"
   fi
+
   if build "sord" "0.16.8"; then
     download "https://gitlab.com/drobilla/sord/-/archive/v0.16.8/sord-v0.16.8.tar.gz" "sord-v0.16.8.tar.gz"
     execute cp -r "${PACKAGES}"/autowaf/* "${PACKAGES}/sord-v0.16.8/waflib/"
-    execute ./waf configure --prefix="${WORKSPACE}" CFLAGS="${CFLAGS}" --static --no-shared --no-utils
+    if $SHARED_LIBRARIES; then
+      execute ./waf configure --prefix="${WORKSPACE}" CFLAGS="${CFLAGS}" --no-utils
+    else
+      execute ./waf configure --prefix="${WORKSPACE}" CFLAGS="${CFLAGS}" --static --no-shared --no-utils
+    fi
     execute ./waf CFLAGS="${CFLAGS}"
     execute ./waf install
 
@@ -658,7 +778,11 @@ if command_exists "python3"; then
   if build "sratom" "0.6.8"; then
     download "https://gitlab.com/lv2/sratom/-/archive/v0.6.8/sratom-v0.6.8.tar.gz" "sratom-v0.6.8.tar.gz"
     execute cp -r "${PACKAGES}"/autowaf/* "${PACKAGES}/sratom-v0.6.8/waflib/"
-    execute ./waf configure --prefix="${WORKSPACE}" --static --no-shared
+    if $SHARED_LIBRARIES; then
+      execute ./waf configure --prefix="${WORKSPACE}"
+    else
+      execute ./waf configure --prefix="${WORKSPACE}" --static --no-shared
+    fi
     execute ./waf
     execute ./waf install
 
@@ -667,7 +791,11 @@ if command_exists "python3"; then
   if build "lilv" "0.24.12"; then
     download "https://gitlab.com/lv2/lilv/-/archive/v0.24.12/lilv-v0.24.12.tar.gz" "lilv-v0.24.12.tar.gz"
     execute cp -r "${PACKAGES}"/autowaf/* "${PACKAGES}/lilv-v0.24.12/waflib/"
-    execute ./waf configure --prefix="${WORKSPACE}" --static --no-shared --no-utils
+    if $SHARED_LIBRARIES; then
+      execute ./waf configure --prefix="${WORKSPACE}" --no-utils
+    else
+      execute ./waf configure --prefix="${WORKSPACE}" --static --no-shared --no-utils
+    fi
     execute ./waf
     execute ./waf install
     build_done "lilv" "0.24.12"
@@ -680,7 +808,11 @@ fi
 
 if build "opencore" "0.1.5"; then
   download "https://sourceforge.net/projects/opencore-amr/files/opencore-amr/opencore-amr-0.1.5.tar.gz/download?use_mirror=gigenet" "opencore-amr-0.1.5.tar.gz"
-  execute ./configure --prefix="${WORKSPACE}" --disable-shared --enable-static
+  if $SHARED_LIBRARIES; then
+    execute ./configure --prefix="${WORKSPACE}" --enable-shared --disable-static
+  else
+    execute ./configure --prefix="${WORKSPACE}" --disable-shared --enable-static
+  fi
   execute make -j $MJOBS
   execute make install
 
@@ -690,7 +822,13 @@ CONFIGURE_OPTIONS+=("--enable-libopencore_amrnb" "--enable-libopencore_amrwb")
 
 if build "lame" "3.100"; then
   download "https://sourceforge.net/projects/lame/files/lame/3.100/lame-3.100.tar.gz/download?use_mirror=gigenet" "lame-3.100.tar.gz"
-  execute ./configure --prefix="${WORKSPACE}" --disable-shared --enable-static
+  if $SHARED_LIBRARIES; then
+    sed "/lame_init_old/d" include/libmp3lame.sym > include/libmp3lame.sym.patched
+	  mv include/libmp3lame.sym.patched include/libmp3lame.sym
+    execute ./configure --prefix="${WORKSPACE}" --enable-shared --disable-static
+  else
+    execute ./configure --prefix="${WORKSPACE}" --disable-shared --enable-static
+  fi
   execute make -j $MJOBS
   execute make install
 
@@ -700,7 +838,11 @@ CONFIGURE_OPTIONS+=("--enable-libmp3lame")
 
 if build "opus" "1.3.1"; then
   download "https://archive.mozilla.org/pub/opus/opus-1.3.1.tar.gz"
-  execute ./configure --prefix="${WORKSPACE}" --disable-shared --enable-static
+  if $SHARED_LIBRARIES; then
+    execute ./configure --prefix="${WORKSPACE}" --enable-shared --disable-static
+  else
+    execute ./configure --prefix="${WORKSPACE}" --disable-shared --enable-static
+  fi
   execute make -j $MJOBS
   execute make install
 
@@ -710,19 +852,31 @@ CONFIGURE_OPTIONS+=("--enable-libopus")
 
 if build "libogg" "1.3.3"; then
   download "https://ftp.osuosl.org/pub/xiph/releases/ogg/libogg-1.3.3.tar.gz"
-  execute ./configure --prefix="${WORKSPACE}" --disable-shared --enable-static
+  if $SHARED_LIBRARIES; then
+    execute ./configure --prefix="${WORKSPACE}" --enable-shared --disable-static
+  else
+    execute ./configure --prefix="${WORKSPACE}" --disable-shared --enable-static
+  fi
   execute make -j $MJOBS
   execute make install
   build_done "libogg" "1.3.3"
 fi
 
-if build "libvorbis" "1.3.6"; then
-  download "https://ftp.osuosl.org/pub/xiph/releases/vorbis/libvorbis-1.3.6.tar.gz"
-  execute ./configure --prefix="${WORKSPACE}" --with-ogg-libraries="${WORKSPACE}"/lib --with-ogg-includes="${WORKSPACE}"/include/ --enable-static --disable-shared --disable-oggtest
+if build "libvorbis" "1.3.7"; then
+  download "https://ftp.osuosl.org/pub/xiph/releases/vorbis/libvorbis-1.3.7.tar.gz"
+  echo $PWD
+  
+  patch configure.ac ${CWD%/descript}/vorbis.config.patch
+  ./autogen.sh
+  if $SHARED_LIBRARIES; then
+    execute ./configure --prefix="${WORKSPACE}" --with-ogg-libraries="${WORKSPACE}"/lib --with-ogg-includes="${WORKSPACE}"/include/ --disable-static --enable-shared --disable-oggtest
+  else
+    execute ./configure --prefix="${WORKSPACE}" --with-ogg-libraries="${WORKSPACE}"/lib --with-ogg-includes="${WORKSPACE}"/include/ --enable-static --disable-shared --disable-oggtest
+  fi
   execute make -j $MJOBS
   execute make install
 
-  build_done "libvorbis" "1.3.6"
+  build_done "libvorbis" "1.3.7"
 fi
 CONFIGURE_OPTIONS+=("--enable-libvorbis")
 
@@ -731,10 +885,25 @@ if build "libtheora" "1.1.1"; then
   sed "s/-fforce-addr//g" configure >configure.patched
   chmod +x configure.patched
   mv configure.patched configure
-  execute ./configure --prefix="${WORKSPACE}" --with-ogg-libraries="${WORKSPACE}"/lib --with-ogg-includes="${WORKSPACE}"/include/ --with-vorbis-libraries="${WORKSPACE}"/lib --with-vorbis-includes="${WORKSPACE}"/include/ --enable-static --disable-shared --disable-oggtest --disable-vorbistest --disable-examples --disable-asm --disable-spec
+  if $SHARED_LIBRARIES; then
+    if $MACOS_M1; then
+      # fix Libtool bug https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63610
+      export MACOSX_DEPLOYMENT_TARGET=10.11
+    fi
+    execute ./configure --prefix="${WORKSPACE}" --with-ogg-libraries="${WORKSPACE}"/lib --with-ogg-includes="${WORKSPACE}"/include/ --with-vorbis-libraries="${WORKSPACE}"/lib --with-vorbis-includes="${WORKSPACE}"/include/ --disable-static --enable-shared --disable-oggtest --disable-vorbistest --disable-examples --disable-asm --disable-spec
+  else
+    execute ./configure --prefix="${WORKSPACE}" --with-ogg-libraries="${WORKSPACE}"/lib --with-ogg-includes="${WORKSPACE}"/include/ --with-vorbis-libraries="${WORKSPACE}"/lib --with-vorbis-includes="${WORKSPACE}"/include/ --enable-static --disable-shared --disable-oggtest --disable-vorbistest --disable-examples --disable-asm --disable-spec
+  fi
   execute make -j $MJOBS
   execute make install
 
+  if $SHARED_LIBRARIES; then
+    if $MACOS_M1; then
+      # restore from Line 26
+      export MACOSX_DEPLOYMENT_TARGET=11.0
+    fi
+  fi  
+
   build_done "libtheora" "1.1.1"
 fi
 CONFIGURE_OPTIONS+=("--enable-libtheora")
@@ -742,7 +911,11 @@ CONFIGURE_OPTIONS+=("--enable-libtheora")
 if $NONFREE_AND_GPL; then
   if build "fdk_aac" "2.0.2"; then
     download "https://sourceforge.net/projects/opencore-amr/files/fdk-aac/fdk-aac-2.0.2.tar.gz/download?use_mirror=gigenet" "fdk-aac-2.0.2.tar.gz"
-    execute ./configure --prefix="${WORKSPACE}" --disable-shared --enable-static --enable-pic
+    if $SHARED_LIBRARIES; then
+      execute ./configure --prefix="${WORKSPACE}" --enable-shared --disable-static --enable-pic
+    else
+      execute ./configure --prefix="${WORKSPACE}" --disable-shared --enable-static --enable-pic
+    fi
     execute make -j $MJOBS
     execute make install
 
@@ -757,7 +930,11 @@ fi
 
 if build "libtiff" "4.2.0"; then
   download "https://download.osgeo.org/libtiff/tiff-4.2.0.tar.gz"
-  execute ./configure --prefix="${WORKSPACE}" --disable-shared --enable-static --disable-dependency-tracking --disable-lzma --disable-webp --disable-zstd --without-x
+  if $SHARED_LIBRARIES; then
+    execute ./configure --prefix="${WORKSPACE}" --enable-shared --disable-static --disable-dependency-tracking --disable-lzma --disable-webp --disable-zstd --without-x
+  else
+    execute ./configure --prefix="${WORKSPACE}" --disable-shared --enable-static --disable-dependency-tracking --disable-lzma --disable-webp --disable-zstd --without-x
+  fi
   execute make -j $MJOBS
   execute make install
   build_done "libtiff" "4.2.0"
@@ -766,40 +943,45 @@ if build "libpng" "1.6.37"; then
   download "https://sourceforge.net/projects/libpng/files/libpng16/1.6.37/libpng-1.6.37.tar.gz/download?use_mirror=gigenet" "libpng-1.6.37.tar.gz"
   export LDFLAGS="${LDFLAGS}"
   export CPPFLAGS="${CFLAGS}"
-  execute ./configure --prefix="${WORKSPACE}" --disable-shared --enable-static
+  if $SHARED_LIBRARIES; then
+    execute ./configure --prefix="${WORKSPACE}" --enable-shared --disable-static
+  else
+    execute ./configure --prefix="${WORKSPACE}" --disable-shared --enable-static
+  fi
   execute make -j $MJOBS
   execute make install
   build_done "libpng" "1.6.37"
 fi
 
-## does not compile on monterey -> _PrintGifError
-if [[ "$OSTYPE" != "darwin"* ]]; then
-  if build "libwebp" "1.2.1"; then
-    # libwebp can fail to compile on Ubuntu if these flags were left set to CFLAGS
-    CPPFLAGS=
-    download "https://storage.googleapis.com/downloads.webmproject.org/releases/webp/libwebp-1.2.1.tar.gz" "libwebp-1.2.1.tar.gz"
-    execute ./configure --prefix="${WORKSPACE}" --disable-shared --enable-static --disable-dependency-tracking --disable-gl --with-zlib-include="${WORKSPACE}"/include/ --with-zlib-lib="${WORKSPACE}"/lib
-    make_dir build
-    cd build || exit
-    execute cmake -DCMAKE_INSTALL_PREFIX="${WORKSPACE}" -DCMAKE_INSTALL_LIBDIR=lib -DCMAKE_INSTALL_BINDIR=bin -DCMAKE_INSTALL_INCLUDEDIR=include -DENABLE_SHARED=OFF -DENABLE_STATIC=ON ../
-    execute make -j $MJOBS
-    execute make install
+if build "libwebp" "1.2.1"; then
+  # libwebp can fail to compile on Ubuntu if these flags were left set to CFLAGS
+  CPPFLAGS=
+  download "https://storage.googleapis.com/downloads.webmproject.org/releases/webp/libwebp-1.2.1.tar.gz" "libwebp-1.2.1.tar.gz"
+  execute ./configure --prefix="${WORKSPACE}" --disable-shared --enable-static --disable-dependency-tracking --disable-gl --with-zlib-include="${WORKSPACE}"/include/ --with-zlib-lib="${WORKSPACE}"/lib
+  make_dir build
+  cd build || exit
+  execute cmake -DCMAKE_INSTALL_PREFIX="${WORKSPACE}" -DCMAKE_INSTALL_LIBDIR=lib -DCMAKE_INSTALL_BINDIR=bin -DCMAKE_INSTALL_INCLUDEDIR=include -DENABLE_SHARED=OFF -DENABLE_STATIC=ON ../
+  execute make -j $MJOBS
+  execute make install
 
-    build_done "libwebp" "1.2.1"
-  fi
-  CONFIGURE_OPTIONS+=("--enable-libwebp")
+  build_done "libwebp" "1.2.1"
 fi
+CONFIGURE_OPTIONS+=("--enable-libwebp")
 ##
 ## other library
 ##
 
-if build "libsdl" "2.0.14"; then
-  download "https://www.libsdl.org/release/SDL2-2.0.14.tar.gz"
-  execute ./configure --prefix="${WORKSPACE}" --disable-shared --enable-static
+if build "libsdl" "2.28.5"; then
+  download "https://www.libsdl.org/release/SDL2-2.28.5.tar.gz"
+  if $SHARED_LIBRARIES; then
+    execute ./configure --prefix="${WORKSPACE}" --enable-shared --disable-static
+  else
+    execute ./configure --prefix="${WORKSPACE}" --disable-shared --enable-static
+  fi
   execute make -j $MJOBS
   execute make install
 
-  build_done "libsdl" "2.0.14"
+  build_done "libsdl" "2.28.5"
 fi
 
 if $NONFREE_AND_GPL; then
@@ -808,7 +990,11 @@ if $NONFREE_AND_GPL; then
     export OPENSSL_ROOT_DIR="${WORKSPACE}"
     export OPENSSL_LIB_DIR="${WORKSPACE}"/lib
     export OPENSSL_INCLUDE_DIR="${WORKSPACE}"/include/
-    execute cmake . -DCMAKE_INSTALL_PREFIX="${WORKSPACE}" -DCMAKE_INSTALL_LIBDIR=lib -DCMAKE_INSTALL_BINDIR=bin -DCMAKE_INSTALL_INCLUDEDIR=include -DENABLE_SHARED=OFF -DENABLE_STATIC=ON -DENABLE_APPS=OFF -DUSE_STATIC_LIBSTDCXX=ON
+    if $SHARED_LIBRARIES; then
+      execute cmake . -DCMAKE_INSTALL_PREFIX="${WORKSPACE}" -DCMAKE_INSTALL_LIBDIR=lib -DCMAKE_INSTALL_BINDIR=bin -DCMAKE_INSTALL_INCLUDEDIR=include -DENABLE_SHARED=ON -DENABLE_STATIC=OFF -DENABLE_APPS=OFF -DUSE_STATIC_LIBSTDCXX=ON
+    else
+      execute cmake . -DCMAKE_INSTALL_PREFIX="${WORKSPACE}" -DCMAKE_INSTALL_LIBDIR=lib -DCMAKE_INSTALL_BINDIR=bin -DCMAKE_INSTALL_INCLUDEDIR=include -DENABLE_SHARED=OFF -DENABLE_STATIC=ON -DENABLE_APPS=OFF -DUSE_STATIC_LIBSTDCXX=ON
+    fi
     execute make install
 
     if [ -n "$LDEXEFLAGS" ]; then
@@ -865,6 +1051,105 @@ if [[ "$OSTYPE" == "linux-gnu" ]]; then
   CONFIGURE_OPTIONS+=("--enable-amf")
 fi
 
+
+##
+##  Descript Additions
+##
+
+if $SHARED_LIBRARIES; then
+  if build "twolame" "0.4.0"; then
+    download "https://downloads.sourceforge.net/twolame/twolame-0.4.0.tar.gz"
+    execute ./configure --prefix="${WORKSPACE}" --enable-shared --disable-static
+    execute make -j $MJOBS
+    execute make install
+
+    build_done "twolame" "0.4.0"
+  fi
+  CONFIGURE_OPTIONS+=("--enable-libtwolame")
+
+
+  if build "shine" "3.1.1"; then
+    download "https://github.com/toots/shine/archive/3.1.1.tar.gz" "shine-3.1.1.tar.gz"
+    execute autoreconf -i
+    execute ./configure --prefix="${WORKSPACE}" --enable-shared --disable-static
+    execute make -j $MJOBS
+    execute make install
+
+    build_done "shine" "3.1.1"
+  fi
+  CONFIGURE_OPTIONS+=("--enable-libshine")
+
+
+  if build "soxr" "0.1.3"; then
+    download "http://ftp.debian.org/debian/pool/main/libs/libsoxr/libsoxr_0.1.3.orig.tar.xz" "soxr-0.1.3.tar.xz"
+    make_dir build
+    cd build || exit
+    if [[ "$OSTYPE" == "darwin"* ]]; then
+      download "https://raw.githubusercontent.com/macports/macports-ports/master/audio/soxr/files/patch-pffft.c.diff" "patch-pffft.c.diff"
+      execute patch "${PACKAGES}/soxr-0.1.3/src/pffft.c" ${PACKAGES}/patch-pffft.c.diff""
+    fi
+    execute cmake .. -DWITH_OPENMP:BOOL=OFF -Wno-dev -DCMAKE_INSTALL_PREFIX="${WORKSPACE}" -DCMAKE_BUILD_TYPE=Release -DBUILD_SHARED_LIBS:BOOL=ON
+    execute make -j $MJOBS
+    execute make install
+
+    build_done "soxr" "0.1.3"
+  fi
+  CONFIGURE_OPTIONS+=("--enable-libsoxr")
+
+
+  if build "speex" "1.2.0"; then
+    download "http://downloads.us.xiph.org/releases/speex/speex-1.2.0.tar.gz"
+    execute ./configure --prefix="${WORKSPACE}" --enable-shared --disable-static
+    execute make -j $MJOBS
+    execute make install
+
+    build_done "speex" "1.2.0"
+  fi
+  CONFIGURE_OPTIONS+=("--enable-libspeex")
+
+
+  if build "openjpeg" "2.3.1"; then
+    download "https://github.com/uclouvain/openjpeg/archive/v2.3.1.tar.gz" "openjpeg-v2.3.1.tar.gz"
+    make_dir build
+    cd build || exit
+    execute cmake .. -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX="${WORKSPACE}" -DBUILD_SHARED_LIBS:bool=on
+    execute make -j $MJOBS
+    execute make install
+
+    build_done "openjpeg" "2.3.1"
+  fi
+  CONFIGURE_OPTIONS+=("--enable-libopenjpeg")
+
+
+  if build "snappy" "1.1.8"; then
+    download "https://github.com/google/snappy/archive/1.1.8.tar.gz"
+    make_dir build
+    cd build || exit
+    execute cmake .. -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX="${WORKSPACE}" -DBUILD_SHARED_LIBS:bool=on
+    execute make -j $MJOBS
+
+    #if [[ "$OSTYPE" == "darwin"* ]]; then
+    #  execute install_name_tool -id "${WORKSPACE}/lib/libsnappy.1.dylib" libsnappy.1.dylib
+    #fi
+
+    execute make install
+
+    build_done "snappy" "1.1.8"
+  fi
+  CONFIGURE_OPTIONS+=("--enable-libsnappy")
+
+
+  if build "xz" "5.2.5"; then
+    download "https://tukaani.org/xz/xz-5.2.5.tar.gz"
+    execute ./configure --prefix="${WORKSPACE}" --enable-shared --disable-static
+    execute make -j $MJOBS
+    execute make install
+
+    build_done "xz" "5.2.5"
+  fi
+
+fi
+
 ##
 ## FFmpeg
 ##
@@ -877,6 +1162,23 @@ fi
 build "ffmpeg" "$FFMPEG_VERSION"
 download "https://github.com/FFmpeg/FFmpeg/archive/refs/heads/release/$FFMPEG_VERSION.tar.gz" "FFmpeg-release-$FFMPEG_VERSION.tar.gz"
 # shellcheck disable=SC2086
+if $SHARED_LIBRARIES; then
+./configure "${CONFIGURE_OPTIONS[@]}" \
+  --disable-debug \
+  --disable-doc \
+  --disable-static \
+  --enable-pthreads \
+  --enable-shared\
+  --enable-version3 \
+  --extra-cflags="${CFLAGS}" \
+  --extra-ldexeflags="${LDEXEFLAGS}" \
+  --extra-ldflags="${LDFLAGS}" \
+  --extra-libs="${EXTRALIBS}" \
+  --pkgconfigdir="$WORKSPACE/lib/pkgconfig" \
+  --pkg-config-flags="--static" \
+  --prefix="${WORKSPACE}" \
+  --extra-version="${EXTRA_VERSION}"
+else
 ./configure "${CONFIGURE_OPTIONS[@]}" \
   --disable-debug \
   --disable-doc \
@@ -893,6 +1195,7 @@ download "https://github.com/FFmpeg/FFmpeg/archive/refs/heads/release/$FFMPEG_VE
   --pkg-config-flags="--static" \
   --prefix="${WORKSPACE}" \
   --extra-version="${EXTRA_VERSION}"
+fi
 
 execute make -j $MJOBS
 execute make install
diff --git a/descript/.gitignore b/descript/.gitignore
new file mode 100644
index 00000000..28757cf4
--- /dev/null
+++ b/descript/.gitignore
@@ -0,0 +1 @@
+mac
\ No newline at end of file
diff --git a/descript/README.md b/descript/README.md
new file mode 100644
index 00000000..66f919f7
--- /dev/null
+++ b/descript/README.md
@@ -0,0 +1,96 @@
+![](../ffmpeg-build-script.png)
+
+# Build FFmpeg for Descript
+
+## Author / Contact:
+  - [Charles Van Winkle](https://github.com/cvanwinkle)
+  - [Steve Rubin](https://github.com/srubin) 
+
+## Instructions
+- Run `build-ffmpeg-descript.py`
+
+
+## Build Overview
+The build script automates the following basic operations.
+- Creates a log file to archive the compiler/linker and packaging steps
+- Runs the modified `buildFFmpeg` shell script, outputs to log file
+- Recursively generates or copies `.dSYM` symbol files for each dependency into a `.zip` file
+  - Also fixes `dlyd` loader paths for each dependency
+- Checks that each executable (i.e. `ffmpeg` & `ffprobe`) are runnable
+- Copies `includes` header folder
+- Checks for any linked dependencies which are linked to locations on the build machine and not present in the archive bundle
+- Archives the upstream tar bundles for each `ffmpeg` component
+  - This is important in case upstream FTP or source servers go offline in the future
+- Generates checksum for each created artifact (build, symbols, packages, log)
+ 
+## Development
+Known issues:
+- CI can only build `x86_64` and doesn't yet cross-compile to `arm64`
+- When running on CI, there's libraries linked from `/usr/local/opt/...` which are non-portable
+  - Watch the script output at the end for warnings about this. These could turn into errors later.
+
+## Patches
+- The build-ffmpeg shell script is modified directly to allow for
+  - building shared libraries
+  - disable non-free codecs
+  - add additional codecs that Descript uses
+
+## Deployment / Releases
+- Currently, the script is run manually on a developer's machine
+  - once for each platform (`x86_64` and `arm64`)
+- Build artifacts (`*.zip` files) are manually uploaded to a GitHub release and tagged
+- `SHAMSUM256.txt` files need to be merged between the two platforms when adding to a release.
+
+## Clients
+- This build is consumed by Descript's Beamcoder fork
+  - https://github.com/descriptinc/beamcoder
+
+## Previous Documentation of targeted differences (prior to `arm64` port)
+- ❌ don't need 
+- ✅ already in ffmpeg-build-script build
+- 🕒 need to add to ffmpeg-build-script
+
+Target (`evermeet.cx` static build)
+- `--cc=/usr/bin/clang`
+- `--prefix=/opt/ffmpeg`
+- `--extra-version=tessus`
+- ❌ `--enable-avisynth` - non-linear editing
+- ❌ `--enable-fontconfig`
+- ✅ `--enable-gpl`
+- ✅ `--enable-libaom`
+- ❌ `--enable-libass`
+- ❌ `--enable-libbluray` - bluray playback
+- 🕒✅ `--enable-libdav1d`
+- ❌ `--enable-libfreetype` - text rendering
+- ❌ `--enable-libgsm` - GSM audio
+- ❌ `--enable-libmodplug` - midi/instrument support (https://github.com/Konstanty/libmodplug)
+- ✅ `--enable-libmp3lame`
+- ❌ `--enable-libmysofa` - spatial audio
+- ✅ `--enable-libopencore-amrnb`
+- ✅ `--enable-libopencore-amrwb`
+- 🕒✅ `--enable-libopenh264`
+- 🕒✅ `--enable-libopenjpeg`
+- ✅ `--enable-libopus`
+- ❌ `--enable-librubberband` - time stretching
+- 🕒✅ `--enable-libshine` - mp3 encoder
+- 🕒✅ `--enable-libsnappy` - compression/decompression
+- 🕒✅ `--enable-libsoxr` - resampling
+- 🕒✅ `--enable-libspeex` - speex audio file format
+- ✅ `--enable-libtheora`
+- 🕒✅ `--enable-libtwolame` - mpeg2
+- ✅ `--enable-libvidstab`
+- ❌ `--enable-libvmaf` - perceptual video quality metric
+- ❌ `--enable-libvo-amrwbenc` - VisualOn AMR-WB encoder library
+- ✅ `--enable-libvorbis`
+- ✅ `--enable-libvpx`
+- ✅ `--enable-libwebp`
+- ✅ `--enable-libx264`
+- ✅ `--enable-libx265`
+- ❌ `--enable-libxavs` - AV standard of China
+- ✅ `--enable-libxvid`
+- 🕒✅ `--enable-libzimg` - Scaling, colorspace conversion, and dithering library
+- ❌ `--enable-libzmq` - ZeroMQ Support To Let Multiple Clients Connect To A Single Instance (streaming)
+- ❌ `--enable-libzvbi` - capture and decode VBI (vertical blanking interval) data
+- ✅ `--enable-version3`
+- `--pkg-config-flags=--static`
+- `--disable-ffplay`
diff --git a/descript/build-ffmpeg-descript.py b/descript/build-ffmpeg-descript.py
new file mode 100755
index 00000000..5c792ede
--- /dev/null
+++ b/descript/build-ffmpeg-descript.py
@@ -0,0 +1,488 @@
+#!/usr/bin/env python3
+
+'''
+This file is created by Descript to document and augment
+the FFmpeg building process, for use in Descript's environment.
+
+(1) Call build-ffmpeg with the build command
+(2) Copy or generate dSYM symbol files to the workspace folder
+(3) Copy executables from the workspace folder and all built dependencies to platform output folder
+(4) Fix dyld ids and loader paths for all built libraries
+(5) Zip up the build artifacts
+'''
+
+import glob
+import os
+import pathlib
+import platform
+import re
+import shutil
+import subprocess
+import sys
+import zipfile
+
+#
+#   Constants
+#
+cwd = os.path.dirname(os.path.realpath(__file__))
+base_dir = pathlib.Path(cwd).parent.absolute()
+packages_dir = os.path.join(base_dir, 'packages')
+workspace_dir = os.path.join(base_dir, 'workspace')
+workspace_bin_dir = os.path.join(workspace_dir, 'bin')
+workspace_lib_dir = os.path.join(workspace_dir, 'lib')
+deployment_target = '11.0' if platform.machine() == 'arm64' else '10.11' 
+
+#
+#   Keep track of which libraries are copied, skipped, or missing
+#
+skipped_libs = set()
+copied_libs = set()
+missing_libs = set()
+
+#
+#   Global Logging File
+#
+log_file = None
+
+#
+#
+#
+def log(str):
+    """
+    Logs to stdout and to log_file
+    """
+    log_file.write(str + '\n')
+    print(str, flush=True)
+
+#
+#
+#
+def log_pipe(pipe):
+    """
+    logs from a pipe by calling log()
+    """
+    for line in iter(pipe.readline, b''): # b'\n'-separated lines
+        log(line.decode('utf-8').strip())
+
+#
+#
+#
+def buildFFmpeg(script_dir, log_file):
+    """
+    builds FFmpeg and logs output to `log_file`
+    """
+    # set environment variables
+    env = os.environ
+    env['SKIPINSTALL'] = 'yes'  # append 'SKIPINSTALL=yes' to skip prompt for installing FFmpeg to /usr/local/bin/etc
+    env['VERBOSE'] = 'yes'
+    env['MACOSX_DEPLOYMENT_TARGET'] = deployment_target
+    
+    # call main build script
+    build_ffmpeg_path = os.path.join(script_dir, 'build-ffmpeg')
+    args = [
+        build_ffmpeg_path,
+        '-b',                       # build
+        '--full-shared',            # custom Descript shim to build shared libraries instead of static
+        '--enable-gpl-and-free']    # custom Descript shim to build GPL but not non-free (libpostproc is needed by Beamcoder and requires GPL)
+    log(' '.join(args) + '\n')
+    log_file.flush()
+    shell_proc = subprocess.Popen(args, env=env, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
+    with shell_proc.stdout:
+        log_pipe(shell_proc.stdout)
+    exitcode = shell_proc.wait() # 0 means success
+    if (exitcode != 0):
+        raise exitcode
+
+#
+#
+#
+def copyOrGenerateSymbolFile(file, dest, log_file):
+    """
+    Copies a single symbol file to the workspace destination
+    skips symlinks to avoid duplication
+    Copies entire `dSYM` packages for `dylib` files already within `.dSYM` packages
+    """
+    fileref = pathlib.Path(file)
+    if not fileref.is_symlink():
+        symbolFileName = fileref.name + '.dSYM'
+        destPath = os.path.join(dest, symbolFileName)
+        
+        # See if there's a matching pre-existing symbol file.
+        # If so, copy it, replacing the destination
+        # example:
+        #   ./packages/libtheora-1.1.1/lib/.libs/libtheoraenc.1.dylib.dSYM/Contents/Resources/DWARF/libtheoraenc.1.dylib
+        try:
+            allParts = fileref.parts
+            symbolDirIndex = allParts.index(symbolFileName) # throws ValueError if not in allParts
+            symbolDirParts = allParts[:symbolDirIndex + 1]
+            symbolDir = os.path.join(*symbolDirParts)
+            if os.path.exists(destPath):
+                shutil.rmtree(destPath)
+            shutil.copytree(symbolDir, destPath)
+
+        # Otherwise, generate a symbol file and place it at the destination
+        # example:
+        #   ./packages/libtheora-1.1.1/lib/.libs/libtheora.dylib
+        except ValueError as e:
+            args = ['/usr/bin/dsymutil', str(fileref), '-o', destPath]
+            log(' '.join(args) + '\n')
+            process_result = subprocess.run(args, stdout=subprocess.PIPE)
+            log(process_result.stdout.decode('utf-8'))
+
+#
+#
+#
+def copyOrGenerateSymbolFiles(source, dest, log_file):
+    """
+    Recursively copies symbol files to the workspace destination
+    skips symlinks to avoid duplication
+    Copies entire `dSYM` packages for `dylib` files already within `.dSYM` packages
+    """
+    for fileref in pathlib.Path(source + '/').glob('**/*.dylib'):
+      copyOrGenerateSymbolFile(str(fileref), dest, log_file)
+    for fileref in pathlib.Path(source + '/').glob('**/*.so*'):
+      copyOrGenerateSymbolFile(str(fileref), dest, log_file)
+
+#
+#
+#
+def readDeploymentTarget(src_file) -> str:
+    """
+    Reads the deployment target of a binary
+    :return: something like `'10.11'` or an empty string
+    """
+    args = ['/usr/bin/otool', '-l', src_file]
+    otool_proc = subprocess.Popen(args, stdout=subprocess.PIPE)
+    inLoaderCommand = False
+    for line in otool_proc.stdout:
+        ln = line.decode('utf-8').strip()
+        if inLoaderCommand:
+            if ln.startswith('minos') or ln.startswith('version'):
+                return ln.split(' ')[1]
+            if ln.startswith('sdk'):
+                continue
+        elif 'LC_VERSION_MIN_MACOSX' in ln or 'LC_BUILD_VERSION' in ln:
+            inLoaderCommand = True
+
+    return ''
+           
+
+#
+#
+#
+def copyLibraryAndSymbolPackage(src_file, dest_folder, overwrite):
+    """
+    Copies a library and its corresponding `.dSYM` bundle
+    (if present)
+    """
+    this_deployment_target = readDeploymentTarget(src_file)
+    assert this_deployment_target == deployment_target, '{0} wrong deployment target {1}'.format(src_file, this_deployment_target)
+
+    dest_file = os.path.join(dest_folder, os.path.basename(src_file))
+    
+    # copy file
+    if overwrite and os.path.exists(dest_file):
+        os.remove(dest_file)
+    shutil.copy2(src_file, dest_file, follow_symlinks=False)
+
+    # copy symbol file
+    src_symbol_package = src_file + '.dSYM'
+    if os.path.exists(src_symbol_package):
+        dest_symbol_package = os.path.join(dest_folder, os.path.basename(src_symbol_package))
+        if overwrite and os.path.exists(dest_symbol_package):
+          shutil.rmtree(dest_symbol_package)
+        if not os.path.exists(dest_symbol_package):
+          shutil.copytree(src_symbol_package, dest_symbol_package)
+
+#
+#
+#
+def getFileBaseNameWithoutVersion(file_path) -> str:
+    """
+    :return: `'libpostproc'` for something like `'/foo/bar/libpostproc.55.9.100.dylib'`
+    """
+    base_name = os.path.basename(file_path)
+    base_name = base_name.split('.')[0] # keep everything before first '.'
+    # libSDL2 weirdly has hypthen after then name (i.e., libSDL2-2.0.0.dylib)
+    if base_name.startswith('libSDL2'):
+        base_name = 'libSDL2'
+    return base_name
+
+#
+#
+#
+def getVersionVariantsForFile(file_path):
+    """
+    Returns the following three files for any one of the file paths provided:
+    `'.../ffmpeg-build-script/workspace/lib/libavcodec.58.134.100.dylib'`
+    `'.../ffmpeg-build-script/workspace/lib/libavcodec.58.dylib'`
+    `'.../ffmpeg-build-script/workspace/lib/libavcodec.dylib'`
+
+    """
+    result = set()
+    result.add(file_path)
+    if (pathlib.Path(file_path).is_symlink()):
+        result.add(os.path.realpath(file_path))
+
+    dependency_name_without_version = getFileBaseNameWithoutVersion(file_path)
+    unversioned_dependency_base_name = os.path.join(
+        os.path.dirname(file_path),
+        dependency_name_without_version)
+
+    for variant in glob.glob(unversioned_dependency_base_name + r'.*dylib'):
+        result.add(variant)
+        
+    return list(result)
+
+#
+#
+#
+def copyLibraryAndDependencies(src_file, dest_folder, log_file, parent_path = ''):
+    """
+    Recursive function to copy a library and its (non-system) dependencies
+    also fixes loader paths for each library to be `@loader_path`
+    :param: `parent_path` - optional argument to show which parent is linking against `src_file`
+    """
+
+    dest_file = os.path.join(dest_folder, os.path.basename(src_file))
+
+    # copy file
+    copyLibraryAndSymbolPackage(src_file, dest_folder, True)
+    copied_libs.add(src_file)
+    copied_libs.add(dest_file)
+
+    # identifier for _this_ library
+    this_id = ''
+
+    # recursively copy dependencies
+    args = ['/usr/bin/otool', '-L', src_file]
+    otool_proc = subprocess.Popen(args, stdout=subprocess.PIPE)
+    loader_paths_to_rewrite = []
+    for line in otool_proc.stdout:
+        ln = line.decode('utf-8').strip()
+        match = re.match('[^\s:]+', ln)
+        if not match:
+            continue
+        src_dependency_file = match[0]
+
+        # fix incorrect usage of @rpath
+        rpath_token = '@rpath/'
+        if src_dependency_file.startswith(rpath_token):
+            fixed_path = os.path.join(workspace_lib_dir, src_dependency_file[len(rpath_token):])
+            loader_paths_to_rewrite.append({'old_path': src_dependency_file, 'new_path': fixed_path})
+            src_dependency_file = fixed_path
+
+        if src_dependency_file.startswith('/usr/local'):
+            # the build grabbed libraries installed on this machine
+            # which might not be available on other machines
+            missing_libs.add(f'{src_dependency_file} (dependency of {os.path.basename(parent_path)})')
+        elif src_dependency_file.startswith(workspace_dir):
+            dependency_name = os.path.basename(src_dependency_file)
+            if not len(this_id):
+                # first dependency is the identifier for this library
+                this_id = dependency_name
+            dest_dependency_path = os.path.join(dest_folder, dependency_name)
+            if not src_dependency_file in copied_libs:
+                if src_dependency_file != dest_dependency_path:
+                    # Copy each version variant file (often symlinks)
+                    for variant_src_file in getVersionVariantsForFile(src_dependency_file):
+                        copyLibraryAndSymbolPackage(variant_src_file, dest_folder, False)
+                        variant_dest_file = os.path.join(dest_folder, os.path.basename(variant_src_file))
+                        copied_libs.add(variant_src_file)
+                        copied_libs.add(variant_dest_file)
+
+                    # RECURSIVELY copy dependencies
+                    copyLibraryAndDependencies(
+                        os.path.realpath(src_dependency_file),
+                        dest_folder,
+                        log_file,
+                        src_file)
+            
+            loader_paths_to_rewrite.append({'old_path': src_dependency_file, 'new_path': dest_dependency_path})
+        else:
+            skipped_libs.add(src_dependency_file)
+
+    # find the non-sym-linked version of this library
+    actual_binary_path = os.path.realpath(dest_file)
+
+    # correct the loader path for this library
+    if len(this_id):
+        args = ['/usr/bin/install_name_tool', '-id', '@loader_path/' + this_id, actual_binary_path]
+        log(' '.join(args))
+        subprocess.check_output(args)
+    
+    # correct the loader paths for all dependencies
+    if len(loader_paths_to_rewrite) > 0:
+        for loader_path in loader_paths_to_rewrite:
+            args = ['/usr/bin/install_name_tool', '-change', loader_path['old_path'], '@loader_path/' + os.path.basename(loader_path['new_path']), actual_binary_path]
+            log(' '.join(args))
+            subprocess.check_output(args)
+
+#
+#
+#
+def readVersion() -> str:
+    """
+    Reads the version string from ../build-ffmpeg
+    :return: something like `'1.31rc1'`
+    """
+    result = ''
+    with open(os.path.join(base_dir, 'build-ffmpeg')) as f:
+        lines = f.readlines()
+        for line in lines:
+            if line.startswith('SCRIPT_VERSION='):
+                result = line[15:].strip()
+    return result
+
+#
+#
+#
+def getPlatformMachineVersion() -> str:
+    """
+    :return: a string like `'darwin-x86_64.1.31rc2'`
+    """
+    return sys.platform + '-' + platform.machine() + '.' + readVersion()
+
+
+#
+#
+#
+def generateChecksum(output_folder):
+    """
+    Calculates checksums for every file in `output_folder`
+    and puts it in a `SHAMSUM256.txt` file
+    """
+    checksums = set()
+
+    # calculate checksums for all files
+    for (dirpath, dirnames, filenames) in os.walk(output_folder):
+        for file in filenames:
+            args = ['shasum', '-a', '256', os.path.join(dirpath, file)]
+            output = subprocess.check_output(args)
+            checksum = output.decode('utf-8').strip()
+
+            # replace absolute path to just filename
+            # From: '0a88d3f97f356c6a42449fd548f9b586f565899144849019014e36c7683b745e  /Users/cvanwink/Source/git/electron/src/out/Testing/dist.zip'
+            # To:   '0a88d3f97f356c6a42449fd548f9b586f565899144849019014e36c7683b745e  *electron-v13.1.6-darwin-x64.zip'
+            checksum = checksum.replace(os.path.join(dirpath, ''), '*')
+            checksums.add(checksum)
+        break
+    
+    # Write Checksums to file
+    checksum_file_path = os.path.join(output_folder, 'SHAMSUM256.txt')
+    checksum_file = open(checksum_file_path, 'w')
+    for checksum in checksums:
+        checksum_file.write(f'{checksum}\n')
+    checksum_file.close()
+
+#
+#
+#
+def main():
+    output_dir = os.path.join(cwd, 'mac')
+    if os.path.exists(output_dir):
+        shutil.rmtree(output_dir)
+    temp_dir = os.path.join(output_dir, platform.machine())
+    os.makedirs(temp_dir)
+    symbol_temp_dir = os.path.join(output_dir, platform.machine() + '-symbols')
+
+    executables = ['ffmpeg', 'ffprobe']
+    base_artifact_name = '-'.join(executables) + '-shared-' + getPlatformMachineVersion()
+
+    # create a log file for the build-ffmpeg command for build archival purposes
+    log_file_name = base_artifact_name + '-log.txt'
+    log_file_path = os.path.join(output_dir, log_file_name)
+    globals()['log_file'] = open(log_file_path, 'w')
+
+    log('Begin build-ffmpeg-descript.py')
+    log('=======================')
+
+    # Run the script
+    buildFFmpeg(base_dir, log_file)
+    
+    # Generate dSYM files for each built library
+    log('\nGenerating Symbols')
+    log('=======================')
+    copyOrGenerateSymbolFiles(packages_dir, symbol_temp_dir, log_file)
+
+    # Generate dSYM files for each executable
+    # and copy their dependencies
+    for executable in executables:
+        log('\nCopying & Linking ' + executable)
+        log('=======================')
+        executable_path = os.path.join(workspace_bin_dir, executable)
+        copyOrGenerateSymbolFile(executable_path, symbol_temp_dir, log_file)
+        copyLibraryAndDependencies(executable_path, temp_dir, log_file, executable_path)
+
+        # check that the copied file is runnable
+        log('\nChecking ' + executable)
+        log('=======================')
+        args = [os.path.join(temp_dir, executable), '-version']
+        log(' '.join(args))
+        output = subprocess.check_output(args)
+        log(output.decode('utf-8'))
+
+    symbol_file_name = base_artifact_name + '-symbols'
+    shutil.make_archive(os.path.join(output_dir, symbol_file_name), 'zip', symbol_temp_dir)
+    shutil.rmtree(symbol_temp_dir)
+
+    # Copy Includes
+    shutil.copytree(
+      os.path.join(workspace_dir, 'include'),
+      os.path.join(temp_dir, 'include'))
+
+    log('\nLibrary Info')
+    log('=======================')
+
+    for lib in sorted(missing_libs):
+      log('[WARNING] missing ' + lib)
+
+    for lib in sorted(skipped_libs):
+      log('[NOTE] skipped ' + lib)
+
+    for lib in sorted(copied_libs):
+      log('Copied ' + lib)
+
+    log('\nArchiving third-party source')
+    log('=======================')
+
+    # bundle up the third-party source
+    # grab each .tar.* and any downloaded patches from the packages folder
+    packages_zip_name = base_artifact_name + '-packages.zip'
+    with zipfile.ZipFile(os.path.join(output_dir, packages_zip_name), 'w', zipfile.ZIP_DEFLATED) as myzip:
+        types = ['*.tar.*', '*.patch', '*.diff']
+        for file_type in types:
+            archives = pathlib.Path(packages_dir + '/').glob(file_type)
+            for archive in sorted(archives, key=lambda s: str(s).lower()):
+                log(os.path.join('packages', archive.name))
+                myzip.write(str(archive.absolute()), archive.name)
+
+    log('\nArchiving libraries')
+    log('=======================')
+
+    # bundle up the build artifacts
+    os.chdir(temp_dir)
+    shared_zip_name = base_artifact_name + '.zip'
+    dest_file = os.path.join(output_dir, shared_zip_name)
+    args = ['/usr/bin/zip', '--symlinks', '-r', os.path.join('..', shared_zip_name), '.']
+    log(' '.join(args))
+    subprocess.check_output(args)
+
+    shutil.rmtree(temp_dir)
+    
+    log('\nEnd of build-ffmpeg-descript.py')
+    log('=======================')
+    log_file.close()
+
+    # zip up log file
+    with zipfile.ZipFile(os.path.splitext(log_file_path)[0] + '.zip', 'w', zipfile.ZIP_DEFLATED) as myzip:
+        myzip.write(log_file_path, os.path.basename(log_file_path))
+    os.remove(log_file_path)
+
+    generateChecksum(output_dir)
+
+#
+#   entry
+#
+if __name__ == '__main__':
+    main()
diff --git a/vorbis.config.patch b/vorbis.config.patch
new file mode 100644
index 00000000..67fcd67b
--- /dev/null
+++ b/vorbis.config.patch
@@ -0,0 +1,15 @@
+--- libvorbis-1.3.7/configure.ac	2020-07-03 18:52:28
++++ configure.ac	2023-12-18 10:48:08
+@@ -202,9 +202,9 @@
+ 		CFLAGS="-O3 -Wall -Wextra -ffast-math -D__NO_MATH_INLINES -fsigned-char $sparc_cpu"
+ 		PROFILE="-pg -g -O3 -D__NO_MATH_INLINES -fsigned-char $sparc_cpu" ;;
+ 	*-*-darwin*)
+-		DEBUG="-DDARWIN -fno-common -force_cpusubtype_ALL -Wall -g -O0 -fsigned-char"
+-		CFLAGS="-DDARWIN -fno-common -force_cpusubtype_ALL -Wall -g -O3 -ffast-math -fsigned-char"
+-		PROFILE="-DDARWIN -fno-common -force_cpusubtype_ALL -Wall -g -pg -O3 -ffast-math -fsigned-char";;
++		DEBUG="-DDARWIN -fno-common -Wall -g -O0 -fsigned-char"
++		CFLAGS="-DDARWIN -fno-common -Wall -g -O3 -ffast-math -fsigned-char"
++		PROFILE="-DDARWIN -fno-common -Wall -g -pg -O3 -ffast-math -fsigned-char";;
+ 	*-*-os2*)
+ 		# Use -W instead of -Wextra because gcc on OS/2 is an old version.
+ 		DEBUG="-g -Wall -W -D_REENTRANT -D__NO_MATH_INLINES -fsigned-char"