fixed seeking with WAV and MP3 files and added mono/stereo recording options

dialogs/preferencesdialog.cpp

@@ -23,6 +23,7 @@ PreferencesDialog::PreferencesDialog(QWidget *parent) :
 {
     ui->setupUi(this);
 
+	ui->recordingComboBox->setCurrentIndex(config.recording_mode - 1);
     ui->imgSeqFormatEdit->setText(config.img_seq_formats);
 }
 
@@ -75,5 +76,6 @@ void PreferencesDialog::setup_kbd_shortcuts(QMenuBar* menubar) {
 }
 
 void PreferencesDialog::on_buttonBox_accepted() {
+	config.recording_mode = ui->recordingComboBox->currentIndex() + 1;
     config.img_seq_formats = ui->imgSeqFormatEdit->text();
 }

dialogs/preferencesdialog.ui

@@ -17,7 +17,7 @@
    <item>
     <widget class="QTabWidget" name="tabWidget">
      <property name="currentIndex">
-      <number>2</number>
+      <number>0</number>
      </property>
      <widget class="QWidget" name="tab">
       <attribute name="title">
@@ -34,6 +34,27 @@
        <item row="0" column="1">
         <widget class="QLineEdit" name="imgSeqFormatEdit"/>
        </item>
+       <item row="1" column="0">
+        <widget class="QLabel" name="label_2">
+         <property name="text">
+          <string>Audio Recording:</string>
+         </property>
+        </widget>
+       </item>
+       <item row="1" column="1">
+        <widget class="QComboBox" name="recordingComboBox">
+         <item>
+          <property name="text">
+           <string>Mono</string>
+          </property>
+         </item>
+         <item>
+          <property name="text">
+           <string>Stereo</string>
+          </property>
+         </item>
+        </widget>
+       </item>
       </layout>
      </widget>
      <widget class="QWidget" name="tab_2">