added all codecs from totem, only using gst-libav for now tho; added gst-vaapi, further research required

pkgs/flatpak/codecs/gst-libav.json

@@ -0,0 +1,23 @@
+{
+    "name": "gst-libav",
+    "buildsystem": "meson",
+    "config-opts": [
+        "-Ddoc=disabled"
+    ],
+    "sources": [
+        {
+            "type": "git",
+            "url": "https://gitlab.freedesktop.org/gstreamer/gst-libav.git",
+            "tag": "1.16.2",
+            "commit": "090cfd40aad49ad645a9bf4bdd62e65b739c95f3"
+        },
+        {
+            "type": "patch",
+            "path": "gst-libav-stop-caching-codecs.patch"
+        }
+    ],
+    "post-install": [
+        "mkdir -p /app/lib/codecs/lib/gstreamer-1.0",
+        "mv /app/lib/gstreamer-1.0/*.so /app/lib/codecs/lib/gstreamer-1.0"
+    ]
+}