diff --git a/src/util/color/primaries.rs b/src/util/color/primaries.rs
index b827125..d3a1967 100644
--- a/src/util/color/primaries.rs
+++ b/src/util/color/primaries.rs
@@ -26,6 +26,9 @@ pub enum Primaries {
 
 impl Primaries {
     pub fn name(&self) -> Option<&'static str> {
+        if *self == Primaries::Unspecified {
+            return None;
+        }
         unsafe {
             let ptr = av_color_primaries_name((*self).into());
             if ptr.is_null() {
diff --git a/src/util/color/range.rs b/src/util/color/range.rs
index a440844..689a410 100644
--- a/src/util/color/range.rs
+++ b/src/util/color/range.rs
@@ -13,6 +13,9 @@ pub enum Range {
 
 impl Range {
     pub fn name(&self) -> Option<&'static str> {
+        if *self == Range::Unspecified {
+            return None;
+        }
         unsafe {
             let ptr = av_color_range_name((*self).into());
             if ptr.is_null() {
diff --git a/src/util/color/space.rs b/src/util/color/space.rs
index 4e15551..ddcdd93 100644
--- a/src/util/color/space.rs
+++ b/src/util/color/space.rs
@@ -27,6 +27,9 @@ pub enum Space {
 
 impl Space {
     pub fn name(&self) -> Option<&'static str> {
+        if *self == Space::Unspecified {
+            return None;
+        }
         unsafe {
             let ptr = av_color_space_name((*self).into());
             if ptr.is_null() {
diff --git a/src/util/color/transfer_characteristic.rs b/src/util/color/transfer_characteristic.rs
index b6c3fa9..df3b053 100644
--- a/src/util/color/transfer_characteristic.rs
+++ b/src/util/color/transfer_characteristic.rs
@@ -29,6 +29,9 @@ pub enum TransferCharacteristic {
 
 impl TransferCharacteristic {
     pub fn name(&self) -> Option<&'static str> {
+        if *self == TransferCharacteristic::Unspecified {
+            return None;
+        }
         unsafe {
             let ptr = av_color_transfer_name((*self).into());
             if ptr.is_null() {