Fix segmentation fault by adjust imprecise face location in tracker

src/nv_infer_server_manager.cpp

@@ -472,8 +472,14 @@ void NvInferServerManager::update_frame_with_face_body_meta(
         text_params_imprecise_face.display_text =
             g_strdup(imprecise_face_str[0]);  // g_strdup(pgie_class_str[0]);
         /* Display text above the left top corner of the object. */
-        text_params_imprecise_face.x_offset = rect_params_imprecise_face.left;
-        text_params_imprecise_face.y_offset = rect_params_imprecise_face.top;
+        text_params_imprecise_face.x_offset =
+            (rect_params_imprecise_face.left - 15 < 0)
+                ? 15
+                : rect_params_imprecise_face.left - 15;
+        text_params_imprecise_face.y_offset =
+            (rect_params_imprecise_face.top - 15 < 0)
+                ? 15
+                : rect_params_imprecise_face.top - 15;
         /* Set black background for the text. */
         text_params_imprecise_face.set_bg_clr = 1;
         text_params_imprecise_face.text_bg_clr = NvOSD_ColorParams{0, 0, 0, 1};
@@ -535,9 +541,9 @@ void NvInferServerManager::update_frame_with_face_body_meta(
         //     face_obj->object_id);
         /* Display text above the left top corner of the object. */
         text_params_body.x_offset =
-            (rect_params_body.left - 30 < 0) ? 0 : rect_params_body.left - 30;
+            (rect_params_body.left - 30 < 0) ? 10 : rect_params_body.left - 30;
         text_params_body.y_offset =
-            (rect_params_body.top - 30 < 0) ? 0 : rect_params_body.top - 30;
+            (rect_params_body.top - 30 < 0) ? 10 : rect_params_body.top - 30;
 
         /* Set black background for the text. */
         text_params_body.set_bg_clr = 1;

src/nv_tracker_manager.cpp

@@ -321,6 +321,8 @@ GstPadProbeReturn NvTrackerManager::tracker_src_pad_buffer_probe(
                         face_rect_params->width = x2 - x1;
                         face_rect_params->height = y2 - y1;
 
+                        clamp_rect_params(frame_meta, face_rect_params);
+
                         NvDsObjectMeta *face_obj =
                             nvds_acquire_obj_meta_from_pool(batch_meta);
                         face_obj->unique_component_id =
@@ -372,8 +374,13 @@ GstPadProbeReturn NvTrackerManager::tracker_src_pad_buffer_probe(
                         //     obj_meta->object_id, final_face_obj->object_id);
                         /* Display text above the left top corner of the
                          * object.*/
-                        text_params.x_offset = rect_params.left;
-                        text_params.y_offset = rect_params.top + 30;
+                        text_params.x_offset = (rect_params.left - 15 < 0)
+                                                   ? 15
+                                                   : rect_params.left - 15;
+                        text_params.y_offset = (rect_params.top - 15 < 0)
+                                                   ? 15
+                                                   : rect_params.top - 15;
+
                         /* Set black background for the text. */
                         text_params.set_bg_clr = 1;
                         text_params.text_bg_clr = NvOSD_ColorParams{0, 0, 0, 1};
@@ -543,4 +550,49 @@ GstPadProbeReturn NvTrackerManager::tracker_src_pad_buffer_probe(
 
     frame_number++;
     return GST_PAD_PROBE_OK;
-}
+}
+
+void NvTrackerManager::clamp_rect_params(NvDsFrameMeta *frame_meta,
+                                         NvOSD_RectParams *rect_params) {
+    guint frame_width = frame_meta->source_frame_width;
+    guint frame_height = frame_meta->source_frame_height;
+
+    // read values (DeepStream stores rect params as floats)
+    float left = rect_params->left;
+    float top = rect_params->top;
+    float width = rect_params->width;
+    float height = rect_params->height;
+    float right = left + width;
+    float bottom = top + height;
+
+    // CHECK for invalid numbers (NaN/inf) or out-of-bounds
+    bool invalid = false;
+    if (!std::isfinite(left) || !std::isfinite(top) || !std::isfinite(width) ||
+        !std::isfinite(height)) {
+        invalid = true;
+    } else if (width <= 0.0f || height <= 0.0f) {
+        invalid = true;
+    }
+
+    // clamp coordinates into frame (clip)
+    float clamped_left =
+        std::max(0.0f, std::min(left, (float)frame_width - 1.0f));
+    float clamped_top =
+        std::max(0.0f, std::min(top, (float)frame_height - 1.0f));
+    float clamped_right = abs(std::min(right, (float)frame_width - 1.0f));
+    float clamped_bottom = abs(std::min(bottom, (float)frame_height - 1.0f));
+
+    float clamped_w = clamped_right - clamped_left;
+    float clamped_h = clamped_bottom - clamped_top;
+    if (clamped_w <= 0.0f || clamped_h <= 0.0f) {
+        invalid = true;
+    }
+    (void)invalid;
+    
+    rect_params->left = clamped_left;
+    rect_params->top = clamped_top;
+    rect_params->width = clamped_w;
+    rect_params->height = clamped_h;
+    return;
+}
+

src/nv_tracker_manager.hpp

@@ -57,4 +57,5 @@ class NvTrackerManager {
     static std::optional<
         std::tuple<std::tuple<float, float, float, float>, float>>
     face_box_extract(float *);
+    static void clamp_rect_params(NvDsFrameMeta *, NvOSD_RectParams *);
 };