FS-7514: refresh req on vlc channel

src/mod/formats/mod_vlc/mod_vlc.c

@@ -114,6 +114,7 @@ struct vlc_video_context {
 	int height;
 	int force_width;
 	int force_height;
+	int video_refresh_req;
 };
 
 typedef struct vlc_video_context vlc_video_context_t;
@@ -345,6 +346,11 @@ static void vlc_video_channel_unlock_callback(void *data, void *id, void *const
 		context->last_video_ts = now;
 	}
 
+	if (context->video_refresh_req > 0) {
+		flag |= SFF_WAIT_KEY_FRAME;
+		context->video_refresh_req--;
+	}
+
 	switch_core_codec_encode_video(codec, context->img, frame->data, &encoded_data_len, &flag);
 
 	while(encoded_data_len) {
@@ -1465,6 +1471,9 @@ static switch_status_t vlc_receive_message(switch_core_session_t *session, switc
 			break;
 		case SWITCH_MESSAGE_INDICATE_JITTER_BUFFER:
 			break;
+		case SWITCH_MESSAGE_INDICATE_VIDEO_REFRESH_REQ:
+			tech_pvt->context->video_refresh_req = 1;
+			break;
 		default:
 			break;
 	}