diff --git a/libavcodec/vaapi_encode_h264.c b/libavcodec/vaapi_encode_h264.c
index b1b503b2a6..06b0004a2c 100644
--- a/libavcodec/vaapi_encode_h264.c
+++ b/libavcodec/vaapi_encode_h264.c
@@ -26,6 +26,7 @@
 #include "libavutil/internal.h"
 #include "libavutil/opt.h"
 
+#include "atsc_a53.h"
 #include "avcodec.h"
 #include "cbs.h"
 #include "cbs_h264.h"
@@ -40,6 +41,7 @@ enum {
     SEI_TIMING         = 0x01,
     SEI_IDENTIFIER     = 0x02,
     SEI_RECOVERY_POINT = 0x04,
+    SEI_A53_CC         = 0x08,
 };
 
 // Random (version 4) ISO 11578 UUID.
@@ -98,6 +100,8 @@ typedef struct VAAPIEncodeH264Context {
     H264RawSEIRecoveryPoint        sei_recovery_point;
     SEIRawUserDataUnregistered     sei_identifier;
     char                          *sei_identifier_string;
+    SEIRawUserDataRegistered       sei_a53cc;
+    void                          *sei_a53cc_data;
 
     int aud_needed;
     int sei_needed;
@@ -248,6 +252,13 @@ static int vaapi_encode_h264_write_extra_header(AVCodecContext *avctx,
             if (err < 0)
                 goto fail;
         }
+        if (priv->sei_needed & SEI_A53_CC) {
+            err = ff_cbs_sei_add_message(priv->cbc, au, 1,
+                                         SEI_TYPE_USER_DATA_REGISTERED_ITU_T_T35,
+                                         &priv->sei_a53cc, NULL);
+            if (err < 0)
+                goto fail;
+        }
 
         priv->sei_needed = 0;
 
@@ -681,6 +692,22 @@ static int vaapi_encode_h264_init_picture_params(AVCodecContext *avctx,
         priv->sei_needed |= SEI_RECOVERY_POINT;
     }
 
+    if (priv->sei & SEI_A53_CC) {
+        int err;
+        size_t sei_a53cc_len;
+        av_freep(&priv->sei_a53cc_data);
+        err = ff_alloc_a53_sei(pic->input_image, 0, &priv->sei_a53cc_data, &sei_a53cc_len);
+        if (err < 0)
+            return err;
+        if (priv->sei_a53cc_data != NULL) {
+            priv->sei_a53cc.itu_t_t35_country_code = 181;
+            priv->sei_a53cc.data = (uint8_t *)priv->sei_a53cc_data + 1;
+            priv->sei_a53cc.data_length = sei_a53cc_len - 1;
+
+            priv->sei_needed |= SEI_A53_CC;
+        }
+    }
+
     vpic->CurrPic = (VAPictureH264) {
         .picture_id          = pic->recon_surface,
         .frame_idx           = hpic->frame_num,
@@ -1226,6 +1253,7 @@ static av_cold int vaapi_encode_h264_close(AVCodecContext *avctx)
     ff_cbs_fragment_free(&priv->current_access_unit);
     ff_cbs_close(&priv->cbc);
     av_freep(&priv->sei_identifier_string);
+    av_freep(&priv->sei_a53cc_data);
 
     return ff_vaapi_encode_close(avctx);
 }
@@ -1252,7 +1280,7 @@ static const AVOption vaapi_encode_h264_options[] = {
 
     { "sei", "Set SEI to include",
       OFFSET(sei), AV_OPT_TYPE_FLAGS,
-      { .i64 = SEI_IDENTIFIER | SEI_TIMING | SEI_RECOVERY_POINT },
+      { .i64 = SEI_IDENTIFIER | SEI_TIMING | SEI_RECOVERY_POINT | SEI_A53_CC },
       0, INT_MAX, FLAGS, "sei" },
     { "identifier", "Include encoder version identifier",
       0, AV_OPT_TYPE_CONST, { .i64 = SEI_IDENTIFIER },
@@ -1263,6 +1291,9 @@ static const AVOption vaapi_encode_h264_options[] = {
     { "recovery_point", "Include recovery points where appropriate",
       0, AV_OPT_TYPE_CONST, { .i64 = SEI_RECOVERY_POINT },
       INT_MIN, INT_MAX, FLAGS, "sei" },
+    { "a53_cc", "Include A/53 caption data"
+      0, AV_OPT_TYPE_CONST, { .i64 = SEI_A53_CC },
+      INT_MIN, INT_MAX, FLAGS, "sei" },
 
     { "profile", "Set profile (profile_idc and constraint_set*_flag)",
       OFFSET(profile), AV_OPT_TYPE_INT,
diff --git a/libavcodec/vaapi_encode_h265.c b/libavcodec/vaapi_encode_h265.c
index 94b56c6578..991d8a3aba 100644
--- a/libavcodec/vaapi_encode_h265.c
+++ b/libavcodec/vaapi_encode_h265.c
@@ -27,6 +27,7 @@
 #include "libavutil/opt.h"
 #include "libavutil/mastering_display_metadata.h"
 
+#include "atsc_a53.h"
 #include "avcodec.h"
 #include "cbs.h"
 #include "cbs_h265.h"
@@ -40,6 +41,7 @@
 enum {
     SEI_MASTERING_DISPLAY       = 0x08,
     SEI_CONTENT_LIGHT_LEVEL     = 0x10,
+    SEI_A53_CC                  = 0x20,
 };
 
 typedef struct VAAPIEncodeH265Picture {
@@ -84,6 +86,8 @@ typedef struct VAAPIEncodeH265Context {
 
     SEIRawMasteringDisplayColourVolume sei_mastering_display;
     SEIRawContentLightLevelInfo        sei_content_light_level;
+    SEIRawUserDataRegistered           sei_a53cc;
+    void                              *sei_a53cc_data;
 
     CodedBitstreamContext *cbc;
     CodedBitstreamFragment current_access_unit;
@@ -226,6 +230,13 @@ static int vaapi_encode_h265_write_extra_header(AVCodecContext *avctx,
             if (err < 0)
                 goto fail;
         }
+        if (priv->sei_needed & SEI_A53_CC) {
+            err = ff_cbs_sei_add_message(priv->cbc, au, 1,
+                                         SEI_TYPE_USER_DATA_REGISTERED_ITU_T_T35,
+                                         &priv->sei_a53cc, NULL);
+            if (err < 0)
+                goto fail;
+        }
 
         priv->sei_needed = 0;
 
@@ -888,6 +899,22 @@ static int vaapi_encode_h265_init_picture_params(AVCodecContext *avctx,
         }
     }
 
+    if (priv->sei & SEI_A53_CC) {
+        int err;
+        size_t sei_a53cc_len;
+        av_freep(&priv->sei_a53cc_data);
+        err = ff_alloc_a53_sei(pic->input_image, 0, &priv->sei_a53cc_data, &sei_a53cc_len);
+        if (err < 0)
+            return err;
+        if (priv->sei_a53cc_data != NULL) {
+            priv->sei_a53cc.itu_t_t35_country_code = 181;
+            priv->sei_a53cc.data = (uint8_t *)priv->sei_a53cc_data + 1;
+            priv->sei_a53cc.data_length = sei_a53cc_len - 1;
+
+            priv->sei_needed |= SEI_A53_CC;
+        }
+    }
+
     vpic->decoded_curr_pic = (VAPictureHEVC) {
         .picture_id    = pic->recon_surface,
         .pic_order_cnt = hpic->pic_order_cnt,
@@ -1355,6 +1382,7 @@ static av_cold int vaapi_encode_h265_close(AVCodecContext *avctx)
 
     ff_cbs_fragment_free(&priv->current_access_unit);
     ff_cbs_close(&priv->cbc);
+    av_freep(&priv->sei_a53cc_data);
 
     return ff_vaapi_encode_close(avctx);
 }
@@ -1413,7 +1441,7 @@ static const AVOption vaapi_encode_h265_options[] = {
 
     { "sei", "Set SEI to include",
       OFFSET(sei), AV_OPT_TYPE_FLAGS,
-      { .i64 = SEI_MASTERING_DISPLAY | SEI_CONTENT_LIGHT_LEVEL },
+      { .i64 = SEI_MASTERING_DISPLAY | SEI_CONTENT_LIGHT_LEVEL | SEI_A53_CC },
       0, INT_MAX, FLAGS, "sei" },
     { "hdr",
       "Include HDR metadata for mastering display colour volume "
@@ -1421,6 +1449,11 @@ static const AVOption vaapi_encode_h265_options[] = {
       0, AV_OPT_TYPE_CONST,
       { .i64 = SEI_MASTERING_DISPLAY | SEI_CONTENT_LIGHT_LEVEL },
       INT_MIN, INT_MAX, FLAGS, "sei" },
+    { "a53_cc",
+      "Include A/53 caption data"
+      0, AV_OPT_TYPE_CONST,
+      { .i64 = SEI_A53_CC },
+      INT_MIN, INT_MAX, FLAGS, "sei" },
 
     { "tiles", "Tile columns x rows",
       OFFSET(common.tile_cols), AV_OPT_TYPE_IMAGE_SIZE,
