diff --git a/input/gvctrl/gvctrl.go b/input/gvctrl/gvctrl.go
index ce99e51e..029b3346 100644
--- a/input/gvctrl/gvctrl.go
+++ b/input/gvctrl/gvctrl.go
@@ -148,7 +148,15 @@ func CodecOut(c Codec) Option {
 // heights are 256, 360 and 720.
 func Height(h int) Option {
 	return func(s settings) (settings, error) {
-		v, ok := map[int]string{256: res256, 360: res360, 720: res720}[h]
+		var m map[int]string
+		switch s.ch {
+		case 1:
+			// TODO: add other resolutions supported by channel 1.
+			m = map[int]string{1080: res1080}
+		case 2:
+			m = map[int]string{256: res256, 360: res360, 720: res720}
+		}
+		v, ok := m[h]
 		if !ok {
 			return s, fmt.Errorf("invalid display height: %d", h)
 		}