diff --git a/samples/record.cc b/samples/record.cc
index 9ec1810..0ab0bd2 100644
--- a/samples/record.cc
+++ b/samples/record.cc
@@ -78,36 +78,38 @@ int main(int argc, char *argv[]) {
     if (left_datas.size() > 0 && right_datas.size() > 0) {
       auto &&left_frame = left_datas.back().frame_raw;
       auto &&right_frame = right_datas.back().frame_raw;
-      if (left_frame->format() == Format::GREY) {
-        cv::Mat left_img(
-            left_frame->height(), left_frame->width(), CV_8UC1,
-            left_frame->data());
-        cv::Mat right_img(
-            right_frame->height(), right_frame->width(), CV_8UC1,
-            right_frame->data());
-        cv::hconcat(left_img, right_img, img);
-      } else if (left_frame->format() == Format::YUYV) {
-        cv::Mat left_img(
-            left_frame->height(), left_frame->width(), CV_8UC2,
-            left_frame->data());
-        cv::Mat right_img(
-            right_frame->height(), right_frame->width(), CV_8UC2,
-            right_frame->data());
-        cv::cvtColor(left_img, left_img, cv::COLOR_YUV2BGR_YUY2);
-        cv::cvtColor(right_img, right_img, cv::COLOR_YUV2BGR_YUY2);
-        cv::hconcat(left_img, right_img, img);
-      } else if (left_frame->format() == Format::BGR888) {
-        cv::Mat left_img(
-            left_frame->height(), left_frame->width(), CV_8UC3,
-            left_frame->data());
-        cv::Mat right_img(
-            right_frame->height(), right_frame->width(), CV_8UC3,
-            right_frame->data());
-        cv::hconcat(left_img, right_img, img);
-      } else {
-        return -1;
+      if (right_frame->data() && left_frame->data()) {
+        if (left_frame->format() == Format::GREY) {
+          cv::Mat left_img(
+              left_frame->height(), left_frame->width(), CV_8UC1,
+              left_frame->data());
+          cv::Mat right_img(
+              right_frame->height(), right_frame->width(), CV_8UC1,
+              right_frame->data());
+          cv::hconcat(left_img, right_img, img);
+        } else if (left_frame->format() == Format::YUYV) {
+          cv::Mat left_img(
+              left_frame->height(), left_frame->width(), CV_8UC2,
+              left_frame->data());
+          cv::Mat right_img(
+              right_frame->height(), right_frame->width(), CV_8UC2,
+              right_frame->data());
+          cv::cvtColor(left_img, left_img, cv::COLOR_YUV2BGR_YUY2);
+          cv::cvtColor(right_img, right_img, cv::COLOR_YUV2BGR_YUY2);
+          cv::hconcat(left_img, right_img, img);
+        } else if (left_frame->format() == Format::BGR888) {
+          cv::Mat left_img(
+              left_frame->height(), left_frame->width(), CV_8UC3,
+              left_frame->data());
+          cv::Mat right_img(
+              right_frame->height(), right_frame->width(), CV_8UC3,
+              right_frame->data());
+          cv::hconcat(left_img, right_img, img);
+        } else {
+          return -1;
+        }
+        cv::imshow("frame", img);
       }
-      cv::imshow("frame", img);
     }
 
     if (img_count > 10 && imu_count > 50) {  // save