ci: pin ffmpeg

.github/workflows/ci.yml

@@ -51,12 +51,12 @@ jobs:
         id: cache-ffmpeg
         uses: actions/cache@v2
         with:
-          path: ffmpeg_build
+          path: ~/ffmpeg_build
           key: ${{ runner.os }}-ffmpeg
       - name: Build ffmpeg
         if: steps.cache-ffmpeg.outputs.cache-hit != 'true'
         run: |
-          git clone https://github.com/ffmpeg/ffmpeg --depth 1
+          git clone https://github.com/ffmpeg/ffmpeg --branch n6.0 --depth 1
           cd ffmpeg
           mkdir build
           cd build
@@ -101,9 +101,11 @@ jobs:
       - name: Vcpkg install ffmpeg
         if: steps.cache-vcpkg.outputs.cache-hit != 'true'
         run: |
-          git clone https://github.com/microsoft/vcpkg --depth 1
+          git clone https://github.com/microsoft/vcpkg -b 2023.07.21 --single-branch --depth 1
           ./vcpkg/bootstrap-vcpkg.bat
-          ./vcpkg/vcpkg.exe install ffmpeg:x64-windows-static
+          cp ${{ github.workspace }}/vcpkg.json ./vcpkg/ 
+          ./vcpkg/vcpkg x-update-baseline --add-initial-baseline
+          ./vcpkg/vcpkg.exe install
 
       - name: Build
         env: