diff --git a/.travis.yml b/.travis.yml
index e2042c0..ba4cc8a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -16,5 +16,18 @@ install:
   - sudo pip3 install meson==0.53.2
   - curl http://archive.ubuntu.com/ubuntu/pool/universe/n/nasm/nasm_2.14.02-1_amd64.deb --output $HOME/nasm_2.14.02-1_amd64.deb
   - sudo dpkg -i $HOME/nasm_2.14.02-1_amd64.deb
+jobs:
+  include:
+    - name: armeabi-v7a
+      env: TARGET_ABI=armeabi-v7a
+
+    - name: arm64-v8a
+      env: TARGET_ABI=arm64-v8a
+
+    - name: x86
+      env: TARGET_ABI=x86
+
+    - name: x86_64
+      env: TARGET_ABI=x86_64
 script:
-  - ./ffmpeg-android-maker.sh -dav1d
+  - ./ffmpeg-android-maker.sh -dav1d -abis=$TARGET_ABI
diff --git a/README.md b/README.md
index fbc38da..0d70d09 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ The script also produces `ffmpeg` and `ffprobe` executables that can be used in
 
 The main focus of ffmpeg-android-maker is to prepare shared libraries for seamless integration into an Android project. The script prepares the `output` directory that is meant to be used. And it's not the only thing this project does.
 
-By default this script downloads and builds the FFmpeg **4.3**, but the version can be overridden.
+By default this script downloads and builds the FFmpeg **4.3.1**, but the version can be overridden.
 
 The details of how this script is implemented are described in this series of posts:
 * [Part 1](https://proandroiddev.com/a-story-about-ffmpeg-in-android-part-i-compilation-898e4a249422)
@@ -39,26 +39,26 @@ Also there are a lot of arguments that you can pass to the `ffmpeg-android-maker
 * x86
 * x86_64
 
-You can build only some of these ABIs by specifying a [flag](https://github.com/Javernaut/ffmpeg-android-maker/wiki/Available-script-arguments#desired-abis-to-build).
+If you need to build only some of these ABIs, you can do so by specifying a [flag](https://github.com/Javernaut/ffmpeg-android-maker/wiki/Available-script-arguments#desired-abis-to-build).
 
 ## Supported host OS
 
-On **macOS** or **Linux** just execute the ffmpeg-android-maker.sh script in terminal. Please follow the instructions in [Requirements](#Requirements) section.
+Regardless of the OS you use, you need to setup it before executing the script. Please follow the instructions in [Requirements](#Requirements) section.
 
-~~It is also possible to execute this script on a **Windows** machine with [MSYS2](https://www.msys2.org). You also need to install specific packages to it: *make*, *git*, *diffutils* and *tar*. The script supports both 32-bit and 64-bit versions of Windows. Also see Prerequisites section for necessary software.~~
+On **macOS** and **Linux** the script is supported natively. Just execute it script in the terminal.
 
-Since v2.0.0 the MSYS2 support is temporary absent.
+On **Windows 10** you can use [WSL](https://docs.microsoft.com/en-us/windows/wsl/about) technology to install [Ubuntu 20.04 LTS](https://www.microsoft.com/en-us/p/ubuntu-2004-lts/9n6svws3rx71?activetab=pivot:overviewtab) app. Then follow the Linux way of executing the script. Note that you will need to manually install exactly Linux versions of Android SDK and NDK into your Linux subsystem. The [Dockerfile](https://github.com/Javernaut/ffmpeg-android-maker/blob/master/tools/docker/Dockerfile) may help to understand how to do the setup.
 
-Since v2.1.1 the **Windows** support is done with [Docker](https://www.docker.com) tool.
-Check [this WIKI page](https://github.com/Javernaut/ffmpeg-android-maker/wiki/Docker-support) for more info.
+Also on **any OS** you can use [Docker](https://www.docker.com) tool to execute the script.
+Check [this WIKI page](https://github.com/Javernaut/ffmpeg-android-maker/wiki/Docker-support) out to understand benefits of this approach.
 
 ## Requirements
 
-The script expects to use **at least** Android NDK **r19** (both **r20** and **r21** also work ok).
+The script assumes you have Android SDK and NDK already installed. In order to tell the script their locations you have to define 2 environment variables:
+* `ANDROID_SDK_HOME` - absolute path to your Android SDK
+* `ANDROID_NDK_HOME` - absolute path to your Android NDK
 
-Before the script is executed you have to define two environment variables:
-* `ANDROID_SDK_HOME` - path to your Android SDK
-* `ANDROID_NDK_HOME` - path to your Android NDK
+The script expects to use **at least** Android NDK **r19** (both **r20** and **r21** also work ok).
 
 Certain external libraries require additional software to be installed. Check this [WIKI page](https://github.com/Javernaut/ffmpeg-android-maker/wiki/Supported-external-libraries) out for more info. Note that if you don't need these external libraries then you also don't need to install the additional software. These external libraries are not built by default.
 
@@ -74,4 +74,6 @@ Certain external libraries require additional software to be installed. Check th
 
 ## License
 
-The ffmpeg-android-maker's source code is available under the MIT license. See the `LICENSE.txt` file for more details.
\ No newline at end of file
+The ffmpeg-android-maker's source code is available under the MIT license. See the `LICENSE.txt` file for more details.
+
+However, the binaries that are produced have different license. The FFmpeg itself is under [LGPL 2.1](http://ffmpeg.org/legal.html). Enabling certain external libraries (like libx264) changes the license to be GPL 2 or later.
\ No newline at end of file
diff --git a/scripts/common-functions.sh b/scripts/common-functions.sh
index 045a830..5867335 100755
--- a/scripts/common-functions.sh
+++ b/scripts/common-functions.sh
@@ -17,7 +17,7 @@ function downloadTarArchive() {
   echo "Ensuring sources of ${LIBRARY_NAME} in ${LIBRARY_SOURCES}"
 
   if [[ ! -d "$LIBRARY_SOURCES" ]]; then
-    curl -O ${DOWNLOAD_URL}
+    curl -LO ${DOWNLOAD_URL}
 
     EXTRACTION_DIR="."
     if [ "$NEED_EXTRA_DIRECTORY" = true ] ; then
diff --git a/scripts/export-build-variables.sh b/scripts/export-build-variables.sh
index 843bd70..7f69983 100755
--- a/scripts/export-build-variables.sh
+++ b/scripts/export-build-variables.sh
@@ -65,6 +65,7 @@ export CROSS_PREFIX_WITH_PATH=${TOOLCHAIN_PATH}/bin/${CROSS_PREFIX}
 # Exporting Binutils paths, if passing just CROSS_PREFIX_WITH_PATH is not enough
 # The FAM_ prefix is used to eliminate passing those values implicitly to build systems
 export FAM_ADDR2LINE=${CROSS_PREFIX_WITH_PATH}addr2line
+export        FAM_AS=${CROSS_PREFIX_WITH_PATH}as
 export        FAM_AR=${CROSS_PREFIX_WITH_PATH}ar
 export        FAM_NM=${CROSS_PREFIX_WITH_PATH}nm
 export   FAM_OBJCOPY=${CROSS_PREFIX_WITH_PATH}objcopy
@@ -80,7 +81,6 @@ export TARGET=${TARGET_TRIPLE_MACHINE_CC}-linux-${TARGET_TRIPLE_OS}${ANDROID_PLA
 export FAM_CC=${TOOLCHAIN_PATH}/bin/${TARGET}-clang
 export FAM_CXX=${FAM_CC}++
 export FAM_LD=${FAM_CC}
-export FAM_AS=${FAM_CC}
 
 # TODO consider abondaning this strategy of defining the name of the clang wrapper
 # in favour of just passing -mstackrealign and -fno-addrsig depending on
diff --git a/scripts/export-host-variables.sh b/scripts/export-host-variables.sh
index 1ce6575..751b9d5 100755
--- a/scripts/export-host-variables.sh
+++ b/scripts/export-host-variables.sh
@@ -33,5 +33,7 @@ export MAKE_EXECUTABLE=$(which make)
 export NINJA_EXECUTABLE=$(which ninja)
 # Meson is used for libdav1d building. Needs to be installed
 export MESON_EXECUTABLE=$(which meson)
-# Nasm is used for libdav1d building. Needs to be installed
+# Nasm is used for libdav1d and libx264 building. Needs to be installed
 export NASM_EXECUTABLE=$(which nasm)
+# A utility to properly pick shared libraries by FFmpeg's configure script. Needs to be installed
+export PKG_CONFIG_EXECUTABLE=$(which pkg-config)
diff --git a/scripts/ffmpeg/build.sh b/scripts/ffmpeg/build.sh
index b354902..efff39d 100755
--- a/scripts/ffmpeg/build.sh
+++ b/scripts/ffmpeg/build.sh
@@ -13,6 +13,10 @@ case $ANDROID_ABI in
     ;;
 esac
 
+if [ "$FFMPEG_GPL_ENABLED" = true ] ; then
+    EXTRA_BUILD_CONFIGURATION_FLAGS="$EXTRA_BUILD_CONFIGURATION_FLAGS --enable-gpl"
+fi
+
 # Preparing flags for enabling requested libraries
 ADDITIONAL_COMPONENTS=
 for LIBARY_NAME in ${FFMPEG_EXTERNAL_LIBRARIES[@]}
@@ -37,7 +41,7 @@ DEP_LD_FLAGS="-L${BUILD_DIR_EXTERNAL}/${ANDROID_ABI}/lib $FFMPEG_EXTRA_LD_FLAGS"
   --cxx=${FAM_CXX} \
   --ld=${FAM_LD} \
   --ar=${FAM_AR} \
-  --as=${FAM_AS} \
+  --as=${FAM_CC} \
   --nm=${FAM_NM} \
   --ranlib=${FAM_RANLIB} \
   --strip=${FAM_STRIP} \
@@ -45,7 +49,7 @@ DEP_LD_FLAGS="-L${BUILD_DIR_EXTERNAL}/${ANDROID_ABI}/lib $FFMPEG_EXTRA_LD_FLAGS"
   --extra-ldflags="$DEP_LD_FLAGS" \
   --enable-shared \
   --disable-static \
-  --pkg-config=$(which pkg-config) \
+  --pkg-config=${PKG_CONFIG_EXECUTABLE} \
   ${EXTRA_BUILD_CONFIGURATION_FLAGS} \
   --disable-runtime-cpudetect \
   --disable-programs \
diff --git a/scripts/libdav1d/build.sh b/scripts/libdav1d/build.sh
index 1c7ed29..ce60d61 100755
--- a/scripts/libdav1d/build.sh
+++ b/scripts/libdav1d/build.sh
@@ -10,7 +10,7 @@ c = '${FAM_CC}'
 ar = '${FAM_AR}'
 strip = '${FAM_STRIP}'
 nasm = '${NASM_EXECUTABLE}'
-pkgconfig = '$(which pkg-config)'
+pkgconfig = '${PKG_CONFIG_EXECUTABLE}'
 
 [properties]
 needs_exe_wrapper = true
diff --git a/scripts/libfreetype/build.sh b/scripts/libfreetype/build.sh
new file mode 100755
index 0000000..b8bdf3c
--- /dev/null
+++ b/scripts/libfreetype/build.sh
@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+
+./configure \
+    --prefix=${INSTALL_DIR} \
+    --host=${TARGET} \
+    --with-sysroot=${SYSROOT_PATH} \
+    --disable-shared \
+    --enable-static \
+    --with-pic \
+    --with-zlib \
+    --without-bzip2 \
+    --without-png \
+    --without-harfbuzz \
+    --without-brotli \
+    --without-old-mac-fonts \
+    --without-fsspec \
+    --without-fsref \
+    --without-quickdraw-toolbox \
+    --without-quickdraw-carbon \
+    --without-ats \
+    CC=${FAM_CC} \
+    AR=${FAM_AR} \
+    RANLIB=${FAM_RANLIB} || exit 1
+
+export FFMPEG_EXTRA_LD_FLAGS="${FFMPEG_EXTRA_LD_FLAGS} -lz"
+
+${MAKE_EXECUTABLE} clean
+${MAKE_EXECUTABLE} -j${HOST_NPROC}
+${MAKE_EXECUTABLE} install
diff --git a/scripts/libfreetype/download.sh b/scripts/libfreetype/download.sh
new file mode 100755
index 0000000..5184c6f
--- /dev/null
+++ b/scripts/libfreetype/download.sh
@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+
+source ${SCRIPTS_DIR}/common-functions.sh
+
+FREETYPE_VERSION=2.10.2
+
+downloadTarArchive \
+  "libfreetype" \
+  "https://download.savannah.gnu.org/releases/freetype/freetype-${FREETYPE_VERSION}.tar.gz" \
diff --git a/scripts/libfribidi/build.sh b/scripts/libfribidi/build.sh
new file mode 100755
index 0000000..0aaf74f
--- /dev/null
+++ b/scripts/libfribidi/build.sh
@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+
+./configure \
+    --prefix=${INSTALL_DIR} \
+    --host=${TARGET} \
+    --with-sysroot=${SYSROOT_PATH} \
+    --disable-shared \
+    --enable-static \
+    --disable-dependency-tracking \
+    --disable-fast-install \
+    --disable-debug \
+    --disable-deprecated \
+    --with-pic \
+    CC=${FAM_CC} \
+    AR=${FAM_AR} \
+    RANLIB=${FAM_RANLIB} || exit 1
+
+${MAKE_EXECUTABLE} clean
+# Compiling only the static library. Just 'make' will build an executable and docs as well.
+${MAKE_EXECUTABLE} -j${HOST_NPROC} -C lib
+${MAKE_EXECUTABLE} install -C lib
+# Installing the .pc file
+${MAKE_EXECUTABLE} install-data-am
diff --git a/scripts/libfribidi/download.sh b/scripts/libfribidi/download.sh
new file mode 100755
index 0000000..f64b7d7
--- /dev/null
+++ b/scripts/libfribidi/download.sh
@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+
+source ${SCRIPTS_DIR}/common-functions.sh
+
+FRIBIDI_VERSION=1.0.10
+
+downloadTarArchive \
+  "libfribidi" \
+  "https://github.com/fribidi/fribidi/releases/download/v${FRIBIDI_VERSION}/fribidi-${FRIBIDI_VERSION}.tar.xz"
diff --git a/scripts/libvpx/build.sh b/scripts/libvpx/build.sh
new file mode 100755
index 0000000..566c594
--- /dev/null
+++ b/scripts/libvpx/build.sh
@@ -0,0 +1,63 @@
+#!/usr/bin/env bash
+
+VPX_AS=${FAM_AS}
+
+case $ANDROID_ABI in
+  x86)
+    EXTRA_BUILD_FLAGS="--target=x86-android-gcc --disable-sse4_1 --disable-avx --disable-avx2 --disable-avx512"
+    VPX_AS=${FAM_YASM}
+    ;;
+  x86_64)
+    EXTRA_BUILD_FLAGS="--target=x86_64-android-gcc --disable-avx --disable-avx2 --disable-avx512"
+    VPX_AS=${FAM_YASM}
+    ;;
+  armeabi-v7a)
+    EXTRA_BUILD_FLAGS="--target=armv7-android-gcc --enable-thumb"
+    ;;
+  arm64-v8a)
+    EXTRA_BUILD_FLAGS="--target=arm64-android-gcc --enable-thumb"
+    ;;
+esac
+
+CC=${FAM_CC} \
+CXX=${FAM_CXX} \
+AR=${FAM_AR} \
+LD=${FAM_LD} \
+AS=${VPX_AS} \
+STRIP=${FAM_STRIP} \
+NM=${FAM_NM} \
+./configure \
+    ${EXTRA_BUILD_FLAGS} \
+    --prefix=${INSTALL_DIR} \
+    --libc=${SYSROOT_PATH} \
+    --enable-pic \
+    --enable-realtime-only \
+    --enable-install-libs \
+    --enable-multithread \
+    --enable-webm-io \
+    --enable-libyuv \
+    --enable-small \
+    --enable-better-hw-compatibility \
+    --enable-vp8 \
+    --enable-vp9 \
+    --enable-static \
+    --disable-shared \
+    --disable-ccache \
+    --disable-debug \
+    --disable-gprof \
+    --disable-gcov \
+    --disable-dependency-tracking \
+    --disable-install-docs \
+    --disable-install-bins \
+    --disable-install-srcs \
+    --disable-examples \
+    --disable-tools \
+    --disable-docs \
+    --disable-unit-tests \
+    --disable-decode-perf-tests \
+    --disable-encode-perf-tests \
+    --disable-runtime-cpu-detect  || exit 1
+
+${MAKE_EXECUTABLE} clean
+${MAKE_EXECUTABLE} -j${HOST_NPROC}
+${MAKE_EXECUTABLE} install
diff --git a/scripts/libvpx/download.sh b/scripts/libvpx/download.sh
new file mode 100755
index 0000000..c68fa8f
--- /dev/null
+++ b/scripts/libvpx/download.sh
@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+
+source ${SCRIPTS_DIR}/common-functions.sh
+
+VPX_VERSION=v1.8.2
+
+downloadTarArchive \
+  "libvpx" \
+  "https://chromium.googlesource.com/webm/libvpx/+archive/${VPX_VERSION}.tar.gz" \
+  true
diff --git a/scripts/libx264/build.sh b/scripts/libx264/build.sh
new file mode 100755
index 0000000..14198ad
--- /dev/null
+++ b/scripts/libx264/build.sh
@@ -0,0 +1,40 @@
+#!/usr/bin/env bash
+
+X264_AS=${FAM_CC}
+
+X264_ADDITIONAL_FLAGS=
+
+case $ANDROID_ABI in
+  x86)
+    # Disabling assembler optimizations due to text relocations
+    X264_ADDITIONAL_FLAGS=--disable-asm
+    ;;
+  x86_64)
+    X264_AS=${NASM_EXECUTABLE}
+    ;;
+esac
+
+CC=${FAM_CC} \
+AR=${FAM_AR} \
+AS=${X264_AS} \
+RANLIB=${FAM_RANLIB} \
+STRIP=${FAM_STRIP} \
+./configure \
+    --prefix=${INSTALL_DIR} \
+    --host=${TARGET} \
+    --sysroot=${SYSROOT_PATH} \
+    --enable-pic \
+    --enable-static \
+    --disable-cli \
+    --disable-avs \
+    --disable-lavf \
+    --disable-cli \
+    --disable-ffms \
+    --disable-opencl \
+    --chroma-format=all \
+    --bit-depth=all \
+    ${X264_ADDITIONAL_FLAGS} || exit 1
+
+${MAKE_EXECUTABLE} clean
+${MAKE_EXECUTABLE} -j${HOST_NPROC}
+${MAKE_EXECUTABLE} install
diff --git a/scripts/libx264/download.sh b/scripts/libx264/download.sh
new file mode 100755
index 0000000..46cec38
--- /dev/null
+++ b/scripts/libx264/download.sh
@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+
+source ${SCRIPTS_DIR}/common-functions.sh
+
+# Libx264 doesn't have any versioning system. Currently it has 2 branches: master and stable.
+# Latest commit in stable branch
+# Tue Jun 30 22:28:05 2020 +0300
+LIBX264_VERSION=cde9a93319bea766a92e306d69059c76de970190
+
+downloadTarArchive \
+  "libx264" \
+  "https://code.videolan.org/videolan/x264/-/archive/${LIBX264_VERSION}/x264-${LIBX264_VERSION}.tar.gz"
diff --git a/scripts/parse-arguments.sh b/scripts/parse-arguments.sh
index 528c769..a27fb8d 100755
--- a/scripts/parse-arguments.sh
+++ b/scripts/parse-arguments.sh
@@ -9,87 +9,127 @@
 ABIS_TO_BUILD=()
 API_LEVEL=16
 SOURCE_TYPE=TAR
-SOURCE_VALUE=4.3
+SOURCE_VALUE=4.3.1
 BINUTILS=gnu
 EXTERNAL_LIBRARIES=()
+FFMPEG_GPL_ENABLED=false
+
+# All FREE libraries that are supported
+SUPPORTED_LIBRARIES_FREE=(
+  "libaom"
+  "libdav1d"
+  "libmp3lame"
+  "libopus"
+  "libwavpack"
+  "libtwolame"
+  "libspeex"
+  "libvpx"
+  "libfreetype"
+  "libfribidi"
+)
+
+# All GPL libraries that are supported
+SUPPORTED_LIBRARIES_GPL=(
+  "libx264"
+)
 
 for argument in "$@"; do
   case $argument in
-    # Build for only specified ABIs (separated by comma)
-    --target-abis=*|-abis=*)
-      IFS=',' read -ra ABIS <<< "${argument#*=}"
-      for abi in "${ABIS[@]}"; do
-        case $abi in
-          x86|x86_64|armeabi-v7a|arm64-v8a)
-            ABIS_TO_BUILD+=( "$abi" )
-          ;;
-          arm)
-            ABIS_TO_BUILD+=( "armeabi-v7a" )
-          ;;
-          arm64)
-            ABIS_TO_BUILD+=( "arm64-v8a" )
-          ;;
-          *)
-            echo "Unknown ABI: $abi"
-          ;;
-        esac
-      done
-    ;;
-    # Use this value as Android platform version during compilation.
-    --android-api-level=*|-android=*)
-      API_LEVEL="${argument#*=}"
-    ;;
-    # Checkout the particular tag in the FFmpeg's git repository
-    --source-git-tag=*)
-      SOURCE_TYPE=GIT_TAG
-      SOURCE_VALUE="${argument#*=}"
-    ;;
-    # Checkout the particular branch in the FFmpeg's git repository
-    --source-git-branch=*)
-      SOURCE_TYPE=GIT_BRANCH
-      SOURCE_VALUE="${argument#*=}"
-    ;;
-    # Download the particular tar archive by its version
-    --source-tar=*)
-      SOURCE_TYPE=TAR
-      SOURCE_VALUE="${argument#*=}"
-    ;;
-    # Which binutils to use (gnu or llvm)
-    --binutils=*|-binutils=*)
-      binutils_value="${argument#*=}"
-      case $binutils_value in
-        gnu|llvm)
-          BINUTILS=$binutils_value
+  # Build for only specified ABIs (separated by comma)
+  --target-abis=* | -abis=*)
+    IFS=',' read -ra ABIS <<<"${argument#*=}"
+    for abi in "${ABIS[@]}"; do
+      case $abi in
+      x86 | x86_64 | armeabi-v7a | arm64-v8a)
+        ABIS_TO_BUILD+=("$abi")
+        ;;
+      arm)
+        ABIS_TO_BUILD+=("armeabi-v7a")
         ;;
-        *)
-          echo "Unknown binutils: $binutils_value"
+      arm64)
+        ABIS_TO_BUILD+=("arm64-v8a")
+        ;;
+      *)
+        echo "Unknown ABI: $abi"
         ;;
       esac
+    done
     ;;
-    # Arguments below enable certain external libraries to build into FFmpeg
-    --enable-libaom|-aom)
-      EXTERNAL_LIBRARIES+=( "libaom" )
+  # Use this value as Android platform version during compilation.
+  --android-api-level=* | -android=*)
+    API_LEVEL="${argument#*=}"
     ;;
-    --enable-libdav1d|-dav1d)
-      EXTERNAL_LIBRARIES+=( "libdav1d" )
+  # Checkout the particular tag in the FFmpeg's git repository
+  --source-git-tag=*)
+    SOURCE_TYPE=GIT_TAG
+    SOURCE_VALUE="${argument#*=}"
     ;;
-    --enable-libmp3lame|-mp3lame|-lame)
-      EXTERNAL_LIBRARIES+=( "libmp3lame" )
+  # Checkout the particular branch in the FFmpeg's git repository
+  --source-git-branch=*)
+    SOURCE_TYPE=GIT_BRANCH
+    SOURCE_VALUE="${argument#*=}"
     ;;
-    --enable-libopus|-opus)
-      EXTERNAL_LIBRARIES+=( "libopus" )
+  # Download the particular tar archive by its version
+  --source-tar=*)
+    SOURCE_TYPE=TAR
+    SOURCE_VALUE="${argument#*=}"
     ;;
-    --enable-libwavpack|-wavpack)
-      EXTERNAL_LIBRARIES+=( "libwavpack" )
+  # Which binutils to use (gnu or llvm)
+  --binutils=* | -binutils=*)
+    binutils_value="${argument#*=}"
+    case $binutils_value in
+    gnu | llvm)
+      BINUTILS=$binutils_value
+      ;;
+    *)
+      echo "Unknown binutils: $binutils_value"
+      ;;
+    esac
     ;;
-    --enable-libtwolame|-twolame)
-      EXTERNAL_LIBRARIES+=( "libtwolame" )
+  # Arguments below enable certain external libraries to build into FFmpeg
+  --enable-libaom | -aom)
+    EXTERNAL_LIBRARIES+=("libaom")
     ;;
-    --enable-libspeex|-speex)
-      EXTERNAL_LIBRARIES+=( "libspeex" )
+  --enable-libdav1d | -dav1d)
+    EXTERNAL_LIBRARIES+=("libdav1d")
     ;;
-    *)
-      echo "Unknown argument $argument"
+  --enable-libmp3lame | -mp3lame | -lame)
+    EXTERNAL_LIBRARIES+=("libmp3lame")
+    ;;
+  --enable-libopus | -opus)
+    EXTERNAL_LIBRARIES+=("libopus")
+    ;;
+  --enable-libwavpack | -wavpack)
+    EXTERNAL_LIBRARIES+=("libwavpack")
+    ;;
+  --enable-libtwolame | -twolame)
+    EXTERNAL_LIBRARIES+=("libtwolame")
+    ;;
+  --enable-libspeex | -speex)
+    EXTERNAL_LIBRARIES+=("libspeex")
+    ;;
+  --enable-libvpx | -vpx)
+    EXTERNAL_LIBRARIES+=("libvpx")
+    ;;
+  --enable-libfreetype | -freetype)
+    EXTERNAL_LIBRARIES+=("libfreetype")
+    ;;
+  --enable-libfribidi | -fribidi)
+    EXTERNAL_LIBRARIES+=("libfribidi")
+    ;;
+  --enable-libx264 | -x264)
+    EXTERNAL_LIBRARIES+=("libx264")
+    FFMPEG_GPL_ENABLED=true
+    ;;
+  --enable-all-free | -all-free)
+    EXTERNAL_LIBRARIES+=" ${SUPPORTED_LIBRARIES_FREE[@]}"
+    ;;
+  --enable-all-gpl | -all-gpl)
+    EXTERNAL_LIBRARIES+=" ${SUPPORTED_LIBRARIES_GPL[@]}"
+    FFMPEG_GPL_ENABLED=true
+    ;;
+  *)
+    echo "Unknown argument $argument"
     ;;
   esac
   shift
@@ -99,7 +139,7 @@ done
 # The x86 is the first, because it is more likely to have Text Relocations.
 # In this case the rest ABIs will not be assembled at all.
 if [ ${#ABIS_TO_BUILD[@]} -eq 0 ]; then
-  ABIS_TO_BUILD=( "x86" "x86_64" "armeabi-v7a" "arm64-v8a" )
+  ABIS_TO_BUILD=("x86" "x86_64" "armeabi-v7a" "arm64-v8a")
 fi
 # The FFmpeg will be build for ABIs in this list
 export FFMPEG_ABIS_TO_BUILD=${ABIS_TO_BUILD[@]}
diff --git a/tools/docker/Dockerfile b/tools/docker/Dockerfile
index 6316408..6c81406 100644
--- a/tools/docker/Dockerfile
+++ b/tools/docker/Dockerfile
@@ -6,21 +6,6 @@ ARG VERSION_SDK=6609375
 ARG VERSION_NDK=21.3.6528147
 ARG VERSION_CMAKE=3.10.2.4988404
 
-# Packages to install via apt-get
-ARG VERSION_PYTHON3=3.8.2-0ubuntu2
-ARG VERSION_PYTHON3_PIP=20.0.2-5ubuntu1
-ARG VERSION_PYTHON3_SETUPTOOLS=45.2.0-1
-ARG VERSION_PYTHON3_WHEEL=0.34.2-1
-ARG VERSION_NINJA_BUILD=1.10.0-1build1
-ARG VERSION_BUILD_ESSENTIAL=12.8ubuntu1
-ARG VERSION_OPENJDK_8_JDK_HEADLESS=8u252-b09-1ubuntu1
-ARG VERSION_CURL=7.68.0-1ubuntu2
-ARG VERSION_UNZIP=6.0-25ubuntu1
-ARG VERSION_BASH=5.0-6ubuntu1
-ARG VERSION_NASM=2.14.02-1
-ARG VERSION_PKG_CONFIG=0.29.1-0ubuntu4
-ARG VERSION_MAKE=4.2.1-1.2
-
 # Package to install via pip3
 ARG VERSION_MESON=0.53.2
 
@@ -34,19 +19,19 @@ ENV ANDROID_NDK_HOME=${ANDROID_SDK_HOME}/ndk/${VERSION_NDK}
 
 # Installing basic software
 RUN apt-get update && apt-get install -y --no-install-recommends \
-  python3=$VERSION_PYTHON3 \
-  python3-pip=$VERSION_PYTHON3_PIP \
-  python3-setuptools=$VERSION_PYTHON3_SETUPTOOLS \
-  python3-wheel=$VERSION_PYTHON3_WHEEL \
-  ninja-build=$VERSION_NINJA_BUILD \
-  build-essential=$VERSION_BUILD_ESSENTIAL \
-  openjdk-8-jdk-headless=$VERSION_OPENJDK_8_JDK_HEADLESS \
-  curl=$VERSION_CURL \
-  unzip=$VERSION_UNZIP \
-  bash=$VERSION_BASH \
-  nasm=$VERSION_NASM \
-  pkg-config=$VERSION_PKG_CONFIG \
-  make=$VERSION_MAKE \
+  python3 \
+  python3-pip \
+  python3-setuptools \
+  python3-wheel \
+  ninja-build \
+  build-essential \
+  openjdk-8-jdk-headless \
+  curl \
+  unzip \
+  bash \
+  nasm \
+  pkg-config \
+  make \
     && apt-get clean \
     && rm -rf /var/lib/apt/lists/*