util/dictionary: add a dict! macro to create a dictionary

src/lib.rs

@@ -7,6 +7,7 @@ extern crate ffmpeg_sys as sys;
 
 pub use sys as ffi;
 
+#[macro_use]
 pub mod util;
 pub use util::error::Error;
 pub use util::dictionary;

src/util/dictionary/mod.rs

@@ -9,3 +9,17 @@ pub use self::owned::Owned;
 
 mod iter;
 pub use self::iter::Iter;
+
+#[macro_export]
+macro_rules! dict {
+	( $($key:expr => $value:expr),* $(,)*) => ({
+			let mut dict = ::ffmpeg::Dictionary::new();
+
+			$(
+				dict.set($key, $value);
+			)*
+
+			dict
+		}
+	);
+}

src/util/mod.rs

@@ -1,3 +1,4 @@
+#[macro_use]
 pub mod dictionary;
 pub mod error;
 pub mod rational;