--- include/asterisk/format_cache.h
+++ include/asterisk/format_cache.h
@@ -176,2 +176,7 @@
 /*!
+ * \brief Built-in cached h265 format.
+ */
+extern struct ast_format *ast_format_h265;
+
+/*!
  * \brief Built-in cached mp4 format.
--- main/codec_builtin.c
+++ main/codec_builtin.c
@@ -771,2 +771,9 @@
 
+static struct ast_codec h265 = {
+	.name = "h265",
+	.description = "H.265 video",
+	.type = AST_MEDIA_TYPE_VIDEO,
+	.sample_rate = 90000,
+};
+
 static struct ast_codec mpeg4 = {
@@ -927,6 +934,7 @@
 	res |= CODEC_REGISTER_AND_CACHE(h263);
 	res |= CODEC_REGISTER_AND_CACHE(h263p);
 	res |= CODEC_REGISTER_AND_CACHE(h264);
+	res |= CODEC_REGISTER_AND_CACHE(h265);
 	res |= CODEC_REGISTER_AND_CACHE(mpeg4);
 	res |= CODEC_REGISTER_AND_CACHE(vp8);
 	res |= CODEC_REGISTER_AND_CACHE(vp9);
--- main/format_cache.c
+++ main/format_cache.c
@@ -185,2 +185,7 @@
 /*!
+ * \brief Built-in cached h265 format.
+ */
+struct ast_format *ast_format_h265;
+
+/*!
  * \brief Built-in cached mp4 format.
@@ -339,6 +344,7 @@
 	ao2_replace(ast_format_h263, NULL);
 	ao2_replace(ast_format_h263p, NULL);
 	ao2_replace(ast_format_h264, NULL);
+	ao2_replace(ast_format_h265, NULL);
 	ao2_replace(ast_format_mp4, NULL);
 	ao2_replace(ast_format_vp8, NULL);
 	ao2_replace(ast_format_vp9, NULL);
@@ -434,6 +440,8 @@
 		ao2_replace(ast_format_h263p, format);
 	} else if (!strcmp(name, "h264")) {
 		ao2_replace(ast_format_h264, format);
+	} else if (!strcmp(name, "h265")) {
+		ao2_replace(ast_format_h265, format);
 	} else if (!strcmp(name, "mpeg4")) {
 		ao2_replace(ast_format_mp4, format);
 	} else if (!strcmp(name, "vp8")) {
--- main/rtp_engine.c
+++ main/rtp_engine.c
@@ -2796,2 +2796,4 @@
 	add_static_payload(107, ast_format_opus, 0);
+
+	ast_rtp_engine_load_format(ast_format_h265);