diff --git a/src/codec/id.rs b/src/codec/id.rs
index ec646ee..f7ed105 100644
--- a/src/codec/id.rs
+++ b/src/codec/id.rs
@@ -419,7 +419,6 @@ pub enum Id {
 	DST,
 
 	// subtitle codecs
-	// DVD_SUBTITLE,
 	DVB_SUBTITLE,
 	TEXT,
 	XSUB,
diff --git a/src/lib.rs b/src/lib.rs
index cf4a47a..e346dbe 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -24,6 +24,8 @@ pub use crate::util::{
 	time,
 };
 
+pub type Result<T> = ::std::result::Result<T, Error>;
+
 #[cfg(feature = "format")]
 pub mod format;
 #[cfg(feature = "format")]
@@ -94,7 +96,7 @@ fn init_filter() {
 #[cfg(not(feature = "filter"))]
 fn init_filter() {}
 
-pub fn init() -> Result<(), Error> {
+pub fn init() -> Result<()> {
 	init_util();
 	init_format();
 	init_device();