diff --git a/src/util/timebase.rs b/src/util/timebase.rs
deleted file mode 100644
index a55fb8e..0000000
--- a/src/util/timebase.rs
+++ /dev/null
@@ -1,34 +0,0 @@
-use ffi::*;
-use ::{Rational, Rounding};
-
-pub const DEFAULT: Rational = Rational(AV_TIME_BASE_Q.num, AV_TIME_BASE_Q.den);
-
-pub trait Rescaling {
-	fn rescale<S, D>(&self, source: S, destination: D) -> i64
-		where S: Into<Rational>,
-		      D: Into<Rational>;
-
-	fn rescale_with<S, D>(&self, source: S, destination: D, rounding: Rounding) -> i64
-		where S: Into<Rational>,
-		      D: Into<Rational>;
-}
-
-impl<T: Into<i64> + From<i64>> Rescaling for T {
-	fn rescale<S, D>(&self, source: S, destination: D) -> i64
-		where S: Into<Rational>,
-		      D: Into<Rational>
-	{
-		unsafe {
-			av_rescale_q(self.into(), source.into().into(), destination.into().into()).into()
-		}
-	}
-
-	fn rescale_with<S, D>(&self, source: S, destination: D, rounding: Rounding) -> i64
-		where S: Into<Rational>,
-		      D: Into<Rational>
-	{
-		unsafe {
-			av_rescale_q(self.into(), source.into().into(), destination.into().into()).into()
-		}
-	}
-}