diff --git a/src/util/frame/mod.rs b/src/util/frame/mod.rs
index a8cb5ab..05bbf5b 100644
--- a/src/util/frame/mod.rs
+++ b/src/util/frame/mod.rs
@@ -85,9 +85,9 @@ impl Frame {
 		}
 	}
 
-	pub fn set_pts(&mut self, value: i64) {
+	pub fn set_pts(&mut self, value: Option<i64>) {
 		unsafe {
-			(*self.as_mut_ptr()).pts = value;
+			(*self.as_mut_ptr()).pts = value.unwrap_or(AV_NOPTS_VALUE);
 		}
 	}