Add support backchannel for Tapo source

pkg/mpegts/mpegts_test.go

@@ -0,0 +1,14 @@
+package mpegts
+
+import (
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
+
+func TestTime(t *testing.T) {
+	w := NewWriter()
+	w.WriteTime(0xFFFFFFFF)
+	assert.Equal(t, []byte{0x27, 0xFF, 0xFF, 0xFF, 0xFF}, w.Bytes())
+	ts := ParseTime(w.Bytes())
+	assert.Equal(t, uint32(0xFFFFFFFF), ts)
+}