diff --git a/src/format/format/input.rs b/src/format/format/input.rs
index e64aefe..318b2ec 100644
--- a/src/format/format/input.rs
+++ b/src/format/format/input.rs
@@ -7,6 +7,9 @@ pub struct Input {
 	ptr: *mut AVInputFormat,
 }
 
+unsafe impl Send for Input { }
+unsafe impl Sync for Input { }
+
 impl Input {
 	pub unsafe fn wrap(ptr: *mut AVInputFormat) -> Self {
 		Input { ptr }
diff --git a/src/format/format/output.rs b/src/format/format/output.rs
index b6388f5..56e3fda 100644
--- a/src/format/format/output.rs
+++ b/src/format/format/output.rs
@@ -13,6 +13,9 @@ pub struct Output {
 	ptr: *mut AVOutputFormat,
 }
 
+unsafe impl Send for Output { }
+unsafe impl Sync for Output { }
+
 impl Output {
 	pub unsafe fn wrap(ptr: *mut AVOutputFormat) -> Self {
 		Output { ptr }