- [#] install ffmpeg in GH workflow

Author: suntong

.github/workflows/go-release-build.yml

@@ -25,6 +25,12 @@ jobs:
         with:
           go-version: 1.17
 
+      -
+        name: Install & cache ffmpeg
+        uses: awalsh128/cache-apt-pkgs-action@latest
+        with:
+          packages: ffmpeg
+
       -
         name: Checkout
         uses: actions/checkout@v2