diff --git a/src/format/context/common.rs b/src/format/context/common.rs
index 448462a..e937d8a 100644
--- a/src/format/context/common.rs
+++ b/src/format/context/common.rs
@@ -382,3 +382,14 @@ impl<'a> Iterator for ChapterIterMut<'a> {
 }
 
 impl<'a> ExactSizeIterator for ChapterIterMut<'a> {}
+
+impl fmt::Debug for Context {
+    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
+        let mut s = fmt.debug_struct("AVFormatContext");
+        s.field("bit_rate", &self.bit_rate());
+        s.field("duration", &self.duration());
+        s.field("nb_chapters", &self.nb_chapters());
+        s.field("nb_streams", &self.nb_streams());
+        s.finish()
+    }
+}
diff --git a/src/format/stream/stream.rs b/src/format/stream/stream.rs
index f7c2e0e..c951bab 100644
--- a/src/format/stream/stream.rs
+++ b/src/format/stream/stream.rs
@@ -5,6 +5,7 @@ use format::context::common::Context;
 use libc::c_int;
 use {DictionaryRef, Discard, Rational};
 
+#[derive(Debug)]
 pub struct Stream<'a> {
     context: &'a Context,
     index: usize,