diff -Naur guvcview-src-2.0.5/gview_render/render_osd_vu_meter.c guvcview-src-2.0.6/gview_render/render_osd_vu_meter.c
--- guvcview-src-2.0.5/gview_render/render_osd_vu_meter.c	2017-02-08 18:04:22.000000000 +0200
+++ guvcview-src-2.0.6/gview_render/render_osd_vu_meter.c	2018-10-07 01:15:28.000000000 +0300
@@ -33,9 +33,9 @@
 
 typedef struct _yuv_color_t
 {
-	int8_t y;
-	int8_t u;
-	int8_t v;
+	uint8_t y;
+	uint8_t u;
+	uint8_t v;
 } yuv_color_t;
 
 #define REFERENCE_LEVEL 0.8