diff --git a/src/format/context/common.rs b/src/format/context/common.rs
index e937d8a..f0556e2 100644
--- a/src/format/context/common.rs
+++ b/src/format/context/common.rs
@@ -38,7 +38,7 @@ impl Context {
 
 impl Context {
     #[inline]
-    fn nb_streams(&self) -> u32 {
+    pub fn nb_streams(&self) -> u32 {
         unsafe { (*self.as_ptr()).nb_streams }
     }