diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index df4f6e68ae..06b6a1f63b 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -1857,6 +1857,13 @@ int attribute_align_arg avcodec_encode_audio2(AVCodecContext *avctx,
         frame = extended_frame;
     }
 
+    /* extract audio service type metadata */
+    if (frame) {
+        AVFrameSideData *sd = av_frame_get_side_data(frame, AV_FRAME_DATA_AUDIO_SERVICE_TYPE);
+        if (sd && sd->size >= sizeof(enum AVAudioServiceType))
+            avctx->audio_service_type = *(enum AVAudioServiceType*)sd->data;
+    }
+
     /* check for valid frame size */
     if (frame) {
         if (avctx->codec->capabilities & CODEC_CAP_SMALL_LAST_FRAME) {