diff --git a/libobs/obs-avc.c b/libobs/obs-avc.c
index cec0ee1d9..1ac2cddc3 100644
--- a/libobs/obs-avc.c
+++ b/libobs/obs-avc.c
@@ -216,8 +216,9 @@ void obs_extract_avc_headers(const uint8_t *packet, size_t size,
 			da_push_back_array(header, nal_codestart,
 					   nal_end - nal_codestart);
 		} else if (type == OBS_NAL_SEI) {
-			da_push_back_array(sei, nal_codestart,
-					   nal_end - nal_codestart);
+			if (sei_data)
+				da_push_back_array(sei, nal_codestart,
+						   nal_end - nal_codestart);
 
 		} else {
 			da_push_back_array(new_packet, nal_codestart,
@@ -231,6 +232,8 @@ void obs_extract_avc_headers(const uint8_t *packet, size_t size,
 	*new_packet_size = new_packet.num;
 	*header_data = header.array;
 	*header_size = header.num;
-	*sei_data = sei.array;
-	*sei_size = sei.num;
+	if (sei_data) {
+		*sei_data = sei.array;
+		*sei_size = sei.num;
+	}
 }