diff --git a/cmd/rv/AusOcean_logo_1080p.h264 b/cmd/rv/AusOcean_logo_1080p.h264
new file mode 100644
index 00000000..93332d45
Binary files /dev/null and b/cmd/rv/AusOcean_logo_1080p.h264 differ
diff --git a/cmd/rv/probe_test.go b/cmd/rv/probe_test.go
index 4468af0a..d5413f18 100644
--- a/cmd/rv/probe_test.go
+++ b/cmd/rv/probe_test.go
@@ -1,18 +1,34 @@
 package main
 
 import (
-	"fmt"
+	"io/ioutil"
 	"testing"
+
+	"gocv.io/x/gocv"
 )
 
-func TestMain(m *testing.M) {
+func TestMain(t *testing.T) {
+	//ts := new(turbidityProbe)
+	const (
+		rows = 2464
+		cols = 3280
+	)
 
-	ts := new(turbidityProbe)
+	// Read frame
+	frame, err := ioutil.ReadFile("AusOcean_logo_1080p.h264")
+	if err != nil {
+		t.Fatal(err)
+	}
 
-	frame := make([]byte, 10)
+	// Decode
+	//mat, err := gocv.NewMatFromBytes(rows, cols, gocv.MatTypeCV8UC3, frame)
+	mat, err := gocv.IMDecode(frame, gocv.IMReadUnchanged)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if mat.Empty() {
+		t.Fatal("Empty gocv.Mat")
+	}
 
-	size, err := ts.Write(frame)
-
-	fmt.Println(size)
-	fmt.Println(err)
+	gocv.IMWrite("logo.jpg", mat)
 }