diff --git a/.github/workflows/build-ffmpeg.yml b/.github/workflows/build-ffmpeg.yml
index 0a16da1..62cafe2 100644
--- a/.github/workflows/build-ffmpeg.yml
+++ b/.github/workflows/build-ffmpeg.yml
@@ -29,7 +29,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
         with:
-          python-version: 3.12
+          python-version: 3.8
       - name: Install packages
         if: matrix.os == 'macos-latest'
         run: |
@@ -56,111 +56,111 @@ jobs:
           cibuildwheel --output-dir output
           rm -f output/*.whl
       - name: Upload FFmpeg
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: output-wheel-${{ matrix.os }}-${{ matrix.arch }}
           path: output/
 
-  # build-qemu-stage-1:
-  #   runs-on: ubuntu-latest
-  #   strategy:
-  #     fail-fast: false
-  #     matrix:
-  #       arch: [aarch64, ppc64le]
-  #   env:
-  #     stage: 1
-  #   steps:
-  #     - uses: actions/checkout@v4
-  #     - uses: actions/setup-python@v4
-  #       with:
-  #         python-version: 3.8
-  #     - name: Set up QEMU
-  #       uses: docker/setup-qemu-action@v3
-  #     - name: Build FFmpeg dependencies
-  #       run: |
-  #         docker run -v $PWD:/project:rw --workdir=/project quay.io/pypa/manylinux2014_${{ matrix.arch }} bash -exc '
-  #           export PATH=/opt/python/cp38-cp38/bin:$PATH;
-  #           export CIBUILDWHEEL=1;
-  #           python scripts/build-ffmpeg.py /tmp/vendor --stage ${{ env.stage }};
-  #           cp -ar /tmp/vendor /project;
-  #         '
-  #       shell: bash
-  #     - uses: actions/upload-artifact@v3
-  #       with:
-  #         name: artifacts-${{ matrix.arch }}
-  #         path: vendor
+  build-qemu-stage-1:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        arch: [aarch64, ppc64le]
+    env:
+      stage: 1
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: 3.8
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+      - name: Build FFmpeg dependencies
+        run: |
+          docker run -v $PWD:/project:rw --workdir=/project quay.io/pypa/manylinux2014_${{ matrix.arch }} bash -exc '
+            export PATH=/opt/python/cp38-cp38/bin:$PATH;
+            export CIBUILDWHEEL=1;
+            python scripts/build-ffmpeg.py /tmp/vendor --stage ${{ env.stage }};
+            cp -ar /tmp/vendor /project;
+          '
+        shell: bash
+      - uses: actions/upload-artifact@v4
+        with:
+          name: artifacts-${{ matrix.arch }}
+          path: vendor
 
-  # build-qemu-stage-2:
-  #   needs: build-qemu-stage-1
-  #   runs-on: ubuntu-latest
-  #   strategy:
-  #     fail-fast: false
-  #     matrix:
-  #       arch: [aarch64, ppc64le]
-  #   env:
-  #     stage: 2
-  #   steps:
-  #     - uses: actions/checkout@v4
-  #     - uses: actions/setup-python@v4
-  #       with:
-  #         python-version: 3.8
-  #     - name: Set up QEMU
-  #       uses: docker/setup-qemu-action@v3
-  #     - uses: actions/download-artifact@v3
-  #       with:
-  #         name: artifacts-${{ matrix.arch }}
-  #         path: vendor
-  #     - name: Build FFmpeg dependencies
-  #       run: |
-  #         docker run -v $PWD:/project:rw --workdir=/project quay.io/pypa/manylinux2014_${{ matrix.arch }} bash -exc '
-  #           export PATH=/opt/python/cp38-cp38/bin:$PATH;
-  #           export CIBUILDWHEEL=1;
-  #           cp -ar vendor /tmp;
-  #           python scripts/build-ffmpeg.py /tmp/vendor --stage ${{ env.stage }};
-  #           cp -ar /tmp/vendor /project;
-  #         '
-  #       shell: bash
-  #     - uses: actions/upload-artifact@v3
-  #       with:
-  #         name: artifacts-${{ matrix.arch }}
-  #         path: vendor
+  build-qemu-stage-2:
+    needs: build-qemu-stage-1
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        arch: [aarch64, ppc64le]
+    env:
+      stage: 2
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: 3.8
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+      - uses: actions/download-artifact@v4
+        with:
+          name: artifacts-${{ matrix.arch }}
+          path: vendor
+      - name: Build FFmpeg dependencies
+        run: |
+          docker run -v $PWD:/project:rw --workdir=/project quay.io/pypa/manylinux2014_${{ matrix.arch }} bash -exc '
+            export PATH=/opt/python/cp38-cp38/bin:$PATH;
+            export CIBUILDWHEEL=1;
+            cp -ar vendor /tmp;
+            python scripts/build-ffmpeg.py /tmp/vendor --stage ${{ env.stage }};
+            cp -ar /tmp/vendor /project;
+          '
+        shell: bash
+      - uses: actions/upload-artifact@v4
+        with:
+          name: artifacts-${{ matrix.arch }}
+          path: vendor
 
-  # build-qemu-stage-3:
-  #   needs: build-qemu-stage-2
-  #   runs-on: ubuntu-latest
-  #   strategy:
-  #     fail-fast: false
-  #     matrix:
-  #       arch: [aarch64, ppc64le]
-  #   env:
-  #     stage: 3
-  #   steps:
-  #     - uses: actions/checkout@v4
-  #     - uses: actions/setup-python@v4
-  #       with:
-  #         python-version: 3.8
-  #     - name: Set up QEMU
-  #       uses: docker/setup-qemu-action@v3
-  #     - uses: actions/download-artifact@v3
-  #       with:
-  #         name: artifacts-${{ matrix.arch }}
-  #         path: vendor
-  #     - name: Build FFmpeg
-  #       env:
-  #         CIBW_ARCHS: ${{ matrix.arch }}
-  #         CIBW_BEFORE_ALL_LINUX: cp -ar vendor /tmp
-  #         CIBW_BEFORE_BUILD: python scripts/build-ffmpeg.py /tmp/vendor --stage ${{ env.stage }}
-  #         CIBW_BUILD: cp38-*
-  #         CIBW_REPAIR_WHEEL_COMMAND_LINUX: LD_LIBRARY_PATH=/tmp/vendor/lib:$LD_LIBRARY_PATH auditwheel repair -w {dest_dir} {wheel}
-  #         CIBW_SKIP: "*musllinux*"
-  #         CIBW_TEST_COMMAND: python -c "import dummy"
-  #       run: |
-  #         pip install cibuildwheel
-  #         cibuildwheel --output-dir output
-  #         rm -f output/*.whl
-  #       shell: bash
-  #     - name: Upload FFmpeg
-  #       uses: actions/upload-artifact@v3
-  #       with:
-  #         name: output
-  #         path: output/
+  build-qemu-stage-3:
+    needs: build-qemu-stage-2
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        arch: [aarch64, ppc64le]
+    env:
+      stage: 3
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: 3.8
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+      - uses: actions/download-artifact@v4
+        with:
+          name: artifacts-${{ matrix.arch }}
+          path: vendor
+      - name: Build FFmpeg
+        env:
+          CIBW_ARCHS: ${{ matrix.arch }}
+          CIBW_BEFORE_ALL_LINUX: cp -ar vendor /tmp
+          CIBW_BEFORE_BUILD: python scripts/build-ffmpeg.py /tmp/vendor --stage ${{ env.stage }}
+          CIBW_BUILD: cp38-*
+          CIBW_REPAIR_WHEEL_COMMAND_LINUX: LD_LIBRARY_PATH=/tmp/vendor/lib:$LD_LIBRARY_PATH auditwheel repair -w {dest_dir} {wheel}
+          CIBW_SKIP: "*musllinux*"
+          CIBW_TEST_COMMAND: python -c "import dummy"
+        run: |
+          pip install cibuildwheel
+          cibuildwheel --output-dir output
+          rm -f output/*.whl
+        shell: bash
+      - name: Upload FFmpeg
+        uses: actions/upload-artifact@v4
+        with:
+          name: output
+          path: output/
diff --git a/scripts/build-ffmpeg.py b/scripts/build-ffmpeg.py
index 7c47988..d1f448d 100644
--- a/scripts/build-ffmpeg.py
+++ b/scripts/build-ffmpeg.py
@@ -183,31 +183,31 @@
         ]
 
     codec_group = [
-        # Package(
-        #     name="aom",
-        #     requires=["cmake"],
-        #     source_url="https://storage.googleapis.com/aom-releases/libaom-3.2.0.tar.gz",
-        #     source_strip_components=0,
-        #     build_system="cmake",
-        #     build_arguments=[
-        #         "-DENABLE_DOCS=0",
-        #         "-DENABLE_EXAMPLES=0",
-        #         "-DENABLE_TESTS=0",
-        #         "-DENABLE_TOOLS=0",
-        #     ],
-        #     build_parallel=False,
-        # ),
-        # Package(
-        #     name="ass",
-        #     requires=["fontconfig", "freetype", "fribidi", "harfbuzz", "nasm", "png"],
-        #     source_url="https://github.com/libass/libass/releases/download/0.15.2/libass-0.15.2.tar.gz",
-        # ),
-        # Package(
-        #     name="bluray",
-        #     requires=["fontconfig"],
-        #     source_url="https://download.videolan.org/pub/videolan/libbluray/1.3.4/libbluray-1.3.4.tar.bz2",
-        #     build_arguments=["--disable-bdjava-jar"],
-        # ),
+        Package(
+            name="aom",
+            requires=["cmake"],
+            source_url="https://storage.googleapis.com/aom-releases/libaom-3.2.0.tar.gz",
+            source_strip_components=0,
+            build_system="cmake",
+            build_arguments=[
+                "-DENABLE_DOCS=0",
+                "-DENABLE_EXAMPLES=0",
+                "-DENABLE_TESTS=0",
+                "-DENABLE_TOOLS=0",
+            ],
+            build_parallel=False,
+        ),
+        Package(
+            name="ass",
+            requires=["fontconfig", "freetype", "fribidi", "harfbuzz", "nasm", "png"],
+            source_url="https://github.com/libass/libass/releases/download/0.15.2/libass-0.15.2.tar.gz",
+        ),
+        Package(
+            name="bluray",
+            requires=["fontconfig"],
+            source_url="https://download.videolan.org/pub/videolan/libbluray/1.3.4/libbluray-1.3.4.tar.bz2",
+            build_arguments=["--disable-bdjava-jar"],
+        ),
         Package(
             name="dav1d",
             requires=["meson", "nasm", "ninja"],
@@ -222,12 +222,12 @@
             name="ogg",
             source_url="http://downloads.xiph.org/releases/ogg/libogg-1.3.5.tar.gz",
         ),
-        # Package(
-        #     name="opencore-amr",
-        #     source_url="http://deb.debian.org/debian/pool/main/o/opencore-amr/opencore-amr_0.1.5.orig.tar.gz",
-        #     # parallel build hangs on Windows
-        #     build_parallel=plat != "Windows",
-        # ),
+        Package(
+            name="opencore-amr",
+            source_url="http://deb.debian.org/debian/pool/main/o/opencore-amr/opencore-amr_0.1.5.orig.tar.gz",
+            # parallel build hangs on Windows
+            build_parallel=plat != "Windows",
+        ),
         Package(
             name="openjpeg",
             requires=["cmake"],
@@ -307,14 +307,14 @@
         "--enable-fontconfig",
         "--enable-gmp",
         "--enable-gnutls" if use_gnutls else "--disable-gnutls",
-        #"--enable-libaom",
-        #"--enable-libass",
-        #"--enable-libbluray",
+        "--enable-libaom",
+        "--enable-libass",
+        "--enable-libbluray",
         "--enable-libdav1d",
         "--enable-libfreetype",
         "--enable-libmp3lame",
-        #"--enable-libopencore-amrnb",
-        #"--enable-libopencore-amrwb",
+        "--enable-libopencore-amrnb",
+        "--enable-libopencore-amrwb",
         "--enable-libopenjpeg",
         "--enable-libopus",
         "--enable-libspeex",