diff --git a/.github/workflows/gst-libav1.0.yml b/.github/workflows/gst-libav1.0.yml
new file mode 100644
index 0000000..6409951
--- /dev/null
+++ b/.github/workflows/gst-libav1.0.yml
@@ -0,0 +1,148 @@
+name: gst-libav1.0 Build and Test
+
+on:
+  push:
+    branches: [ 'master', 'main', 'release/**' ]
+  pull_request:
+    branches: [ '*' ]
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build_and_test:
+    name: Build & Test gst-libav1.0
+    runs-on: ubuntu-latest
+    container:
+      image: ubuntu:25.04
+      options: --user root
+    timeout-minutes: 60
+
+    strategy:
+      matrix:
+        gst_ref: [ 'master', 'debian/1.26.2-1', 'debian/1.26.3-1' ]
+      fail-fast: false
+
+    steps:
+      - name: Checkout gnutls-wolfssl repository
+        uses: actions/checkout@v4
+
+      - name: Install Meson and ninja
+        run: |
+          apt-get update
+          apt-get install -y sudo meson ninja-build
+
+      - name: Install GStreamer ≥1.26 dev-packages
+        run: |
+          apt-get update
+          apt-get install -y \
+            libgstreamer1.0-dev \
+            libgstreamer-plugins-base1.0-dev \
+            gstreamer1.0-tools
+
+      - name: Install build tools & dependencies
+        run: |
+          apt-get install -y \
+            build-essential autoconf automake pkg-config yasm git \
+            meson ninja-build cmake \
+            libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev \
+            libavcodec-dev libavformat-dev libavutil-dev libavfilter-dev \
+            gstreamer1.0-tools \
+            gstreamer1.0-plugins-base \
+            gstreamer1.0-plugins-good \
+            gstreamer1.0-plugins-bad \
+            gstreamer1.0-libav \
+            gnulib autopoint gperf gtk-doc-tools nettle-dev \
+            clang libtasn1-bin libtasn1-6-dev libunistring-dev \
+            libp11-kit-dev libunbound-dev wget gtk-doc-tools libswscale-dev libswresample-dev
+
+      - name: Build GnuTLS with wolfSSL provider
+        run: |
+          GNUTLS_INSTALL=/opt/gnutls WOLFSSL_INSTALL=/opt/wolfssl ./setup.sh
+
+      - name: Verify GnuTLS install
+        run: |
+          test -d /opt/gnutls/lib || (echo "/opt/gnutls/lib missing" && exit 1)
+
+      - name: Build FFmpeg with GnuTLS & MPEG-4 encoder
+        run: |
+          cd $RUNNER_WORKSPACE
+          git clone https://git.ffmpeg.org/ffmpeg.git ffmpeg-gnutls
+          cd ffmpeg-gnutls
+          export PKG_CONFIG_PATH="/opt/gnutls/lib/pkgconfig"
+          export CPPFLAGS="-I/opt/gnutls/include"
+          export LDFLAGS="-L/opt/gnutls/lib -Wl,-rpath,/opt/gnutls/lib"
+          export LD_LIBRARY_PATH="/opt/gnutls/lib:$LD_LIBRARY_PATH"
+          ./configure \
+            --prefix=/opt/ffmpeg-gnutls \
+            --disable-openssl \
+            --enable-gnutls \
+            --enable-encoder=mpeg4 \
+            --disable-x86asm \
+            --enable-shared
+          make -j"$(nproc)" && make install
+
+      - name: Verify libav* link against custom GnuTLS
+        run: |
+          export PKG_CONFIG_PATH="/opt/gnutls/lib/pkgconfig:/opt/ffmpeg-gnutls/lib/pkgconfig:$PKG_CONFIG_PATH"
+          export CPPFLAGS="-I/opt/gnutls/include -I/opt/ffmpeg-gnutls/include $CPPFLAGS"
+          export LDFLAGS="-L/opt/gnutls/lib -L/opt/ffmpeg-gnutls/lib \
+            -Wl,-rpath,/opt/gnutls/lib -Wl,-rpath=/opt/ffmpeg-gnutls/lib $LDFLAGS"
+          export LD_LIBRARY_PATH="/opt/gnutls/lib:/opt/ffmpeg-gnutls/lib:$LD_LIBRARY_PATH"
+          for lib in libavformat.so.62 libavfilter.so.11; do
+            echo ">>> ldd for $lib:"
+            ldd /opt/ffmpeg-gnutls/lib/$lib
+            if ! ldd /opt/ffmpeg-gnutls/lib/$lib \
+               | grep -q '/opt/gnutls/lib/libgnutls.so.30'; then
+              echo "✖ $lib is NOT using custom GnuTLS"
+              exit 1
+            fi
+            echo "✔ $lib is using custom GnuTLS"
+          done
+
+      - name: Clone & checkout gst-libav1.0 @ ${{ matrix.gst_ref }}
+        run: |
+          git clone https://salsa.debian.org/gstreamer-team/gst-libav1.0.git gst-libav
+          cd gst-libav
+          git fetch --tags
+          git checkout ${{ matrix.gst_ref }}
+
+      - name: Build gst-libav1.0 (${{ matrix.gst_ref }})
+        working-directory: gst-libav
+        run: |
+          export PKG_CONFIG_PATH="/opt/gnutls/lib/pkgconfig:/opt/ffmpeg-gnutls/lib/pkgconfig:$PKG_CONFIG_PATH"
+          export CPPFLAGS="-I/opt/gnutls/include -I/opt/ffmpeg-gnutls/include $CPPFLAGS"
+          export LDFLAGS="-L/opt/gnutls/lib -L/opt/ffmpeg-gnutls/lib \
+            -Wl,-rpath,/opt/gnutls/lib -Wl,-rpath=/opt/ffmpeg-gnutls/lib $LDFLAGS"
+          export LD_LIBRARY_PATH="/opt/gnutls/lib:/opt/ffmpeg-gnutls/lib:$LD_LIBRARY_PATH"
+          rm -rf build
+          meson setup build --prefix=/usr -Ddoc=disabled -Dtests=enabled
+          ninja -C build
+
+      - name: Smoke-test plugin with gst-inspect & playbin
+        working-directory: gst-libav
+        run: |
+          export PKG_CONFIG_PATH="/opt/gnutls/lib/pkgconfig:/opt/ffmpeg-gnutls/lib/pkgconfig:$PKG_CONFIG_PATH"
+          export CPPFLAGS="-I/opt/gnutls/include -I/opt/ffmpeg-gnutls/include $CPPFLAGS"
+          export LDFLAGS="-L/opt/gnutls/lib -L/opt/ffmpeg-gnutls/lib \
+            -Wl,-rpath,/opt/gnutls/lib -Wl,-rpath=/opt/ffmpeg-gnutls/lib $LDFLAGS"
+          export LD_LIBRARY_PATH="/opt/gnutls/lib:/opt/ffmpeg-gnutls/lib:$LD_LIBRARY_PATH"
+          PAGER=cat \
+          GST_PLUGIN_PATH=$(pwd)/build \
+          GST_PLUGIN_SYSTEM_PATH_1_0=/usr/lib/x86_64-linux-gnu/gstreamer-1.0 \
+            gst-inspect-1.0 libav
+          timeout 30s env \
+            GST_PLUGIN_PATH=$(pwd)/build \
+            GST_PLUGIN_SYSTEM_PATH_1_0=/usr/lib/x86_64-linux-gnu/gstreamer-1.0 \
+            gst-launch-1.0 -v playbin \
+              uri=https://test-streams.mux.dev/x36xhzz/x36xhzz.m3u8 || test $? -eq 124
+
+      - name: Run upstream gst-libav tests
+        working-directory: gst-libav
+        run: |
+          export PKG_CONFIG_PATH="/opt/gnutls/lib/pkgconfig:/opt/ffmpeg-gnutls/lib/pkgconfig:$PKG_CONFIG_PATH"
+          export CPPFLAGS="-I/opt/gnutls/include -I/opt/ffmpeg-gnutls/include $CPPFLAGS"
+          export LDFLAGS="-L/opt/gnutls/lib -L/opt/ffmpeg-gnutls/lib \
+            -Wl,-rpath,/opt/gnutls/lib -Wl,-rpath=/opt/ffmpeg-gnutls/lib $LDFLAGS"
+          export LD_LIBRARY_PATH="/opt/gnutls/lib:/opt/ffmpeg-gnutls/lib:$LD_LIBRARY_PATH"
+          meson test -C build --print-errorlogs