diff --git a/core/src/ffmpeg_windows.rs b/core/src/ffmpeg_windows.rs
index 494c86b..7453b43 100644
--- a/core/src/ffmpeg_windows.rs
+++ b/core/src/ffmpeg_windows.rs
@@ -634,6 +634,7 @@ impl Ffmpeg {
         ffmpeg_command.args(["-map_metadata", "-1"]);
         ffmpeg_command.arg(&self.temp_output_audio_filename);
         ffmpeg_command.overwrite();
+        ffmpeg_command.print_command();
 
         // Sleep for delay
         if !is_video_record(&self.temp_video_filename) && !is_input_audio_record(&self.temp_input_audio_filename) {
diff --git a/gui/interfaces/area_selection.ui b/gui/interfaces/area_selection.ui
index 4ee376c..e86ef82 100644
--- a/gui/interfaces/area_selection.ui
+++ b/gui/interfaces/area_selection.ui
@@ -11,6 +11,8 @@
 		<property name="deletable">False</property>
 		<property name="hexpand">True</property>
 		<property name="vexpand">True</property>
+		<property name="modal">True</property>
+		<property name="destroy-with-parent">True</property>
 		<child type="title">
 			<object class="GtkHeaderBar" id="headerbar2">
 				<property name="visible">True</property>
diff --git a/gui/src/ui.rs b/gui/src/ui.rs
index 6dfca8b..81a979e 100644
--- a/gui/src/ui.rs
+++ b/gui/src/ui.rs
@@ -18,6 +18,8 @@ use std::cell::RefCell;
 use std::ops::Add;
 use std::path::Path;
 use std::rc::Rc;
+use std::sync::mpsc;
+use std::thread;
 
 use crate::{area_capture, config_management, fluent::get_bundle};
 use crate::timer::{RecordClick, recording_delay, start_timer, stop_timer};
@@ -138,6 +140,7 @@ fn build_ui(application: &Application, error_dialog: MessageDialog, error_messag
 
     // --- default properties
     // Windows
+    area_chooser_window.set_transient_for(Some(&main_window));
     area_chooser_window.set_title(Some(&get_bundle("area-chooser", None))); // Title is hidden
     error_dialog.set_transient_for(Some(&main_window));
     select_window.set_transient_for(Some(&main_window));
@@ -985,7 +988,9 @@ fn build_ui(application: &Application, error_dialog: MessageDialog, error_messag
     let _stop_button = stop_button.clone();
     let _video_switch = video_switch.clone();
     let mut _ffmpeg_record_interface = ffmpeg_record_interface.clone();
+    let (tx, rx) = mpsc::channel::<Result<()>>();
     stop_button.connect_clicked(move |_| {
+        let _tx = tx.clone();
         let mut show_play = true;
         _record_time_label.set_visible(false);
         stop_timer(_record_time_label.clone());
@@ -1065,6 +1070,10 @@ fn build_ui(application: &Application, error_dialog: MessageDialog, error_messag
         if show_play {
             _play_button.show();
         }
+        let merge_request = _ffmpeg_record_interface.borrow_mut().merge();
+        thread::spawn(move || {
+            _tx.send(merge_request).unwrap();
+        });
     });
 
     // Delay window button