Only save settings that has been changed

src/transcoder/transcoderoptionsopus.cpp

@@ -44,15 +44,19 @@ TranscoderOptionsOpus::~TranscoderOptionsOpus() {
 }
 
 void TranscoderOptionsOpus::Load() {
+
   QSettings s;
   s.beginGroup(kSettingsGroup + settings_postfix_);
-
   ui_->bitrate_slider->setValue(s.value("bitrate", 320000).toInt() / 1000);
+  s.endGroup();
+
 }
 
 void TranscoderOptionsOpus::Save() {
+
   QSettings s;
   s.beginGroup(kSettingsGroup + settings_postfix_);
-
   s.setValue("bitrate", ui_->bitrate_slider->value() * 1000);
+  s.endGroup();
+
 }