use jpeg instead of png for screenshots

main.go

@@ -11,7 +11,7 @@ import (
 	"github.com/labstack/echo/v4"
 	"github.com/labstack/echo/v4/middleware"
 	"golang.org/x/net/websocket"
-	"image/png"
+	"image/jpeg"
 	"net/http"
 	"os/exec"
 	"strconv"
@@ -269,20 +269,16 @@ func ws(c echo.Context) error {
 			return errors.New("Capture error")
 		}
 
-		var quality png.CompressionLevel
+		var quality int
 
 		if data.Quality == "lq" {
-			quality = png.BestCompression
+			quality = 10
 		} else {
-			quality = png.NoCompression
-		}
-
-		enc := &png.Encoder{
-			CompressionLevel: quality,
+			quality = 90
 		}
 
 		buff := new(bytes.Buffer)
-		enc.Encode(buff, img)
+		jpeg.Encode(buff, img, &jpeg.Options{Quality: quality})
 
 		sendMessageResponse(ws, MessageResponse{
 			Type:  "screenshot",