Compilation-Guide.md

+The dav1d AV1 decoder uses the [Meson build system][meson]. To compile dav1d, **Meson 0.47 or higher** and [Ninja][ninja] are required.
+
+## Basic compilation
+
+Check out the source code using git:
+
+```
+git clone https://code.videolan.org/videolan/dav1d.git
+```
+
+Change to the dav1d directory and configure the build with meson:
+
+```
+cd dav1d
+meson build --buildtype release
+```
+
+To compile it, change to the `build` directory and run ninja:
+
+```
+cd build
+ninja
+```
+
+[meson]: https://mesonbuild.com
+[ninja]: https://ninja-build.org
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