install ffmpeg lib with vcpkg (#8724)

* use vcpkg to install ffmpeg and build sdk from source, so no prebuild lib in hwcodec.
* link ffmpeg in rustdesk directly, ffmpeg can be used as basic library.
* for windows developers, `VCPKG_DEFAULT_HOST_TRIPLET` env need to be set to `x64-windows-static` during installation.

Signed-off-by: 21pages <sunboeasy@gmail.com>

.github/workflows/ci.yml

@@ -4,9 +4,9 @@ env:
 #   MIN_SUPPORTED_RUST_VERSION: "1.46.0"
 #   CICD_INTERMEDIATES_DIR: "_cicd-intermediates"
   VCPKG_BINARY_SOURCES: "clear;x-gha,readwrite"
-  # vcpkg version: 2023.10.19
+  # vcpkg version: 2024.06.15
   # for multiarch gcc compatibility
-  VCPKG_COMMIT_ID: "8eb57355a4ffb410a2e94c07b4dca2dffbee8e50"
+  VCPKG_COMMIT_ID: "f7423ee180c4b7f40d43402c2feb3859161ef625"
 
 on:
   workflow_dispatch:
@@ -112,6 +112,8 @@ jobs:
                libgstreamer-plugins-base1.0-dev \
                libgtk-3-dev \
                libpulse-dev \
+               libva-dev \
+               libvdpau-dev \
                libxcb-randr0-dev \
                libxcb-shape0-dev \
                libxcb-xfixes0-dev \

.github/workflows/flutter-build.yml

@@ -115,6 +115,8 @@ jobs:
           vcpkgGitCommitId: ${{ env.VCPKG_COMMIT_ID }}
 
       - name: Install vcpkg dependencies
+        env:
+          VCPKG_DEFAULT_HOST_TRIPLET: ${{ matrix.job.vcpkg-triplet }}
         run: |
           $VCPKG_ROOT/vcpkg install --triplet ${{ matrix.job.vcpkg-triplet }} --x-install-root="$VCPKG_ROOT/installed"
         shell: bash
@@ -255,6 +257,8 @@ jobs:
           vcpkgGitCommitId: ${{ env.VCPKG_COMMIT_ID }}
 
       - name: Install vcpkg dependencies
+        env:
+          VCPKG_DEFAULT_HOST_TRIPLET: ${{ matrix.job.vcpkg-triplet }}
         run: |
           $VCPKG_ROOT/vcpkg install --triplet ${{ matrix.job.vcpkg-triplet }} --x-install-root="$VCPKG_ROOT/installed"
         shell: bash
@@ -427,7 +431,7 @@ jobs:
 
       - name: Install dependencies
         run: |
-          brew install nasm
+          brew install nasm yasm
       - name: Checkout source code
         uses: actions/checkout@v3
       - name: Install flutter