Add DASH streams for VP9 transcoding (#3275)

vendor/github.com/zencoder/go-dash/v3/helpers/ptrs/ptrs.go

@@ -0,0 +1,49 @@
+package ptrs
+
+func Strptr(v string) *string {
+	p := new(string)
+	*p = v
+	return p
+}
+
+func Intptr(v int) *int {
+	p := new(int)
+	*p = v
+	return p
+}
+
+func Int64ptr(v int64) *int64 {
+	p := new(int64)
+	*p = v
+	return p
+}
+
+func Uintptr(v uint) *uint {
+	p := new(uint)
+	*p = v
+	return p
+}
+
+func Uint32ptr(v uint32) *uint32 {
+	p := new(uint32)
+	*p = v
+	return p
+}
+
+func Uint64ptr(v uint64) *uint64 {
+	p := new(uint64)
+	*p = v
+	return p
+}
+
+func Boolptr(v bool) *bool {
+	p := new(bool)
+	*p = v
+	return p
+}
+
+func Float64ptr(v float64) *float64 {
+	p := new(float64)
+	*p = v
+	return p
+}