Über... hinzugefügt, Icon hinzugefügt

2026-06-09 23:15:29 +02:00
parent 2181f254d2
commit 92168ee5dc
19 changed files with 1039 additions and 88 deletions
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -23,6 +23,8 @@ set(SOURCES
    src/tagwidget.cpp
    src/tagpanel.cpp
    src/connectdialog.cpp
+    src/v4l2worker.cpp
+    src/videowidget.cpp
 )

 set(HEADERS
@@ -33,9 +35,12 @@ set(HEADERS
    include/tagwidget.h
    include/tagpanel.h
    include/connectdialog.h
+    include/v4l2worker.h
+    include/videowidget.h
 )

-add_executable(uartscope ${SOURCES} ${HEADERS})
+qt6_add_resources(RESOURCES resources.qrc)
+add_executable(uartscope ${SOURCES} ${HEADERS} ${RESOURCES})

 target_include_directories(uartscope PRIVATE include)

@@ -46,6 +51,10 @@ target_link_libraries(uartscope PRIVATE
    Qt6::SerialPort
 )

+# V4L2 uses Linux kernel headers directly (linux/videodev2.h)
+# These are part of linux-api-headers / linux-libc-dev on all major distros.
+# No additional library linkage needed.
+
 # Installation
 install(TARGETS uartscope DESTINATION bin)

@@ -56,3 +65,6 @@ configure_file(
    @ONLY
 )
 install(FILES ${CMAKE_BINARY_DIR}/uartscope.desktop DESTINATION share/applications)
+install(FILES ${CMAKE_SOURCE_DIR}/UartscopeLogo.png
+        DESTINATION share/icons/hicolor/512x512/apps
+        RENAME uartscope.png)
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # UARTScope

-Ein moderner UART-Monitor für Linux mit Qt6-Oberfläche. Gebaut als Ersatz für minicom mit deutlich mehr Komfort – besonders nützlich bei der Entwicklung von Baremetal-Projekten wie [Chica](https://github.com/).
+Ein moderner UART-Monitor für Linux mit Qt6-Oberfläche. Gebaut als vollwertiger Ersatz für minicom – besonders nützlich bei der Entwicklung von Baremetal-Projekten wie [Chica](https://git.projekt-hirnfrei.de/diabolus/chica) (Amiga-Hardware-Nachbildung auf dem Raspberry Pi).

 ---

@@ -8,35 +8,45 @@ Ein moderner UART-Monitor für Linux mit Qt6-Oberfläche. Gebaut als Ersatz für

 | Feature | Beschreibung |
 |---|---|
-| **Unbegrenzter Verlauf** | QPlainTextEdit mit unlimitierter Zeilenzahl – keine Daten gehen verloren |
-| **Horizontal + vertikal scrollen** | Kein Zeilenumbruch, voller H-Scrollbalken |
-| **Live-Logging** | Jede empfangene Zeile wird mit Zeitstempel in eine Datei geschrieben |
-| **Tag-Monitor** | Zeilen mit `[TAG]` werden abgefangen und in eigenen Panels angezeigt |
-| **Tabellenansicht** | CSV-formatierte UART-Zeilen werden in einer sortierbaren Tabelle dargestellt |
+| **Unbegrenzter Verlauf** | Kein Zeilenlimit – keine Daten gehen verloren, egal wie viel der Pi sendet |
+| **Timestamps** | Jede Zeile im Raw-View bekommt automatisch einen `hh:mm:ss.zzz`-Timestamp |
+| **H + V Scrolling** | Kein Zeilenumbruch, voller horizontaler Scrollbalken |
+| **Live-Logging** | Alle empfangenen Zeilen werden mit Timestamp in eine Datei geschrieben |
+| **Tag-Monitor** | Zeilen mit `[TAG]` werden in eigenen Panels angezeigt und aktualisiert |
+| **Tag-Filter** | Tags können aus dem Raw-View ausgeblendet werden (nur im Tag-Monitor sichtbar) |
+| **Tabellenansicht** | CSV-formatierte UART-Zeilen werden in einer Tabelle dargestellt |
 | **Suche** | Inkrementelle Volltextsuche im Raw-View |
-| **Dunkles Theme** | Fusion Dark – passt gut zur Terminal-Ästhetik |
+| **Auto-Reconnect** | Bei Verbindungsabbruch wird automatisch neu verbunden (Intervall einstellbar) |
+| **ANSI Clear-Screen** | `\033[2J\033[H` aus der Firmware leert alle Views gleichzeitig |
+| **Copy-Buttons** | Raw-View und jedes Tag-Panel haben einen „📋 Copy"-Button |
+| **V4L2 Live Video** | HDMI-Grabber direkt eingebunden – Live-Vorschau unter dem Tag-Monitor |
+| **Screenshot** | Aktuellen Frame des HDMI-Grabbers als PNG/JPG speichern |
+| **Format-Referenz** | Eingebauter Guide (mit Kopieren-Button) für KI-kompatible UART-Formatierung |
+| **Fensterlayout** | Fenstergröße, Position und alle Splitter-Positionen werden beim Beenden gespeichert |

 ---

 ## Voraussetzungen

 ```bash
+# Arch (empfohlen)
+sudo pacman -S cmake qt6-base qt6-serialport
+
 # Ubuntu / Debian
 sudo apt install cmake qt6-base-dev qt6-serialport-dev libqt6serialport6-dev

-# Arch
-sudo pacman -S cmake qt6-base qt6-serialport
-
 # Fedora
 sudo dnf install cmake qt6-qtbase-devel qt6-qtserialport-devel
 ```

+V4L2 benötigt keine zusätzliche Library – `linux/videodev2.h` ist Teil der Standard-Kernel-Header.
+
 ---

 ## Build

 ```bash
-git clone <repo>
+git clone https://git.projekt-hirnfrei.de/diabolus/uartscope.git
 cd uartscope
 cmake -B build -DCMAKE_BUILD_TYPE=Release
 cmake --build build -j$(nproc)
@@ -50,59 +60,85 @@ sudo cmake --install build

 ---

+## Berechtigungen
+
+```bash
+# UART-Port
+sudo usermod -aG dialout $USER
+
+# HDMI-Grabber / V4L2
+sudo usermod -aG video $USER
+
+# Einmal ausloggen / neu einloggen
+```
+
+Grabber testen:
+```bash
+v4l2-ctl --list-devices                      # alle /dev/video* Geräte
+v4l2-ctl -d /dev/video0 --list-formats-ext  # unterstützte Formate & Auflösungen
+```
+
+---
+
 ## UART-Ausgabe formatieren

-### Tag-Monitor (`[TAG]`)
+### Raw-View (immer aktiv)

-Der Tag-Monitor fängt Zeilen ab, die ein Tag der Form `[TAGNAME]` enthalten.  
-Das Tag erscheint weiterhin im Raw-View (eingefärbt), wird aber **zusätzlich** im Tag-Panel aktualisiert.
+Jede UART-Zeile erscheint im Raw-View mit Timestamp. Keine besondere Formatierung nötig.

-**Watchdog-Beispiel** – dein Watchdog-Handler schickt:
-```
-[WDG] uptime=12345 free_heap=43210 load=0.82
-```
-→ UARTScope erstellt automatisch ein Panel `[WDG]` mit einer Tabelle:
-
-| Key | Value |
-|---|---|
-| uptime | 12345 |
-| free_heap | 43210 |
-| load | 0.82 |
-
-Jedes Update blinkt kurz grün auf – du siehst sofort, dass neue Daten angekommen sind.
-
-**Mehrere Tags gleichzeitig:**
+**Screen leeren** – von der Firmware aus alle Views gleichzeitig leeren:
 ```c
-// In deinem Baremetal-Code:
-uart_printf("[WDG] uptime=%lu free=%lu\n", uptime, heap_free);
-uart_printf("[VIDEO] line=%d hblank=%d vblank=%d\n", line, hb, vb);
-uart_printf("[AUDIO] buf=%d underruns=%d\n", audio_buf, underruns);
+uart_printf("\033[2J\033[H");
 ```
-Für jeden einzigartigen Tag wird automatisch ein eigenes Panel erstellt.
+
+### Tag-Monitor
+
+Zeilen mit `[TAGNAME]` werden im Tag-Monitor-Panel angezeigt **und** im Raw-View hervorgehoben (cyan). Über „Tag filter…" in der Toolbar können Tags vollständig aus dem Raw-View ausgeblendet werden, sodass sie nur noch im Tag-Monitor erscheinen.
+
+**Format:** `[TAGNAME] key1=value1 key2=value2 ...`
+
+- Tag-Name: Buchstaben, Ziffern, Underscore – z.B. `WDG`, `VIDEO`, `I2C_BUS`
+- Key=Value-Paare: Leerzeichen-getrennt, Werte ohne Leerzeichen
+- Ohne Key=Value-Paare wird der rohe String angezeigt
+
+**Beispiele:**
+```c
+uart_printf("[WDG] uptime=%lu free_heap=%lu temp=%d\n",
+            HAL_GetTick(), xPortGetFreeHeapSize(), core_temp);
+
+uart_printf("[VIDEO] line=%d hblank=%d vblank=%d copper=%d\n",
+            scanline, hblank_ticks, vblank_ticks, copper_dma);
+
+uart_printf("[AUDIO] ch=%d buf=%d underruns=%lu\n",
+            active_channels, buffer_fill, underruns);
+```
+
+Jeder einzigartige Tag bekommt automatisch ein eigenes Panel. Panels aktualisieren sich in-place – kein Scrollen nötig.

 ### Tabellenansicht

-Die Tabellenansicht erwartet CSV-Zeilen. Optionale Header-Zeile mit `#`:
+Optionale Header-Zeile mit `#`, dann CSV-Datenzeilen:

 ```
 #time_ms,temperature,voltage,current
 1000,23.5,3.30,0.42
 2000,23.7,3.31,0.41
-3000,24.1,3.29,0.43
 ```

-Delimiter ist per Dropdown umschaltbar (`,` `;` `\t` `|` `Space`).
+Delimiter per Dropdown umschaltbar: `,` `;` `\t` `|` `Space`

 ---

-## Serielle Ports – Berechtigungen
+## Einstellungen

-Auf den meisten Linux-Distros muss dein User in der Gruppe `dialout` sein:
+Beim Beenden werden folgende Einstellungen automatisch gespeichert und beim nächsten Start wiederhergestellt:

-```bash
-sudo usermod -aG dialout $USER
-# Einmal ausloggen / neu einloggen
-```
+- Fenstergröße und -position
+- Splitter-Positionen (Haupt-Splitter und Tag/Video-Splitter)
+- Auto-Reconnect ein/aus und Intervall
+- Tag-Filter (ausgeblendete Tags)
+
+Gespeichert unter `~/.config/ChicaDev/UARTScope.conf` (via `QSettings`).

 ---

@@ -111,14 +147,18 @@ sudo usermod -aG dialout $USER
 ```
 uartscope/
 ├── CMakeLists.txt
+├── README.md
+├── uartscope.desktop.in
 ├── include/
-│   ├── mainwindow.h
-│   ├── serialworker.h     ← UART-Empfang im eigenen Thread
-│   ├── rawview.h          ← Unbegrenzter scrollbarer Log
-│   ├── tableview.h        ← CSV → QTableWidget
+│   ├── mainwindow.h       ← Hauptfenster, koordiniert alle Komponenten
+│   ├── serialworker.h     ← UART-Empfang im eigenen QThread, Auto-Reconnect
+│   ├── rawview.h          ← Unbegrenzter Log mit Timestamps, Suche, Copy
+│   ├── tableview.h        ← CSV-Parser → QTableWidget
 │   ├── tagwidget.h        ← Container für Tag-Panels
-│   ├── tagpanel.h         ← Ein Panel pro [TAG]
-│   └── connectdialog.h    ← Port-Konfiguration
+│   ├── tagpanel.h         ← Ein Panel pro [TAG], Key=Value-Tabelle, Copy
+│   ├── connectdialog.h    ← Port-Konfiguration (Port, Baud, Log-Datei)
+│   ├── v4l2worker.h       ← V4L2-Capture in std::thread, MJPEG/YUYV/NV12
+│   └── videowidget.h      ← Live-Vorschau, Freeze, Screenshot
 └── src/
    ├── main.cpp
    ├── mainwindow.cpp
@@ -127,15 +167,17 @@ uartscope/
    ├── tableview.cpp
    ├── tagwidget.cpp
    ├── tagpanel.cpp
-    └── connectdialog.cpp
+    ├── connectdialog.cpp
+    ├── v4l2worker.cpp
+    └── videowidget.cpp
 ```

 ---

 ## Erweiterungsideen

- **Protokoll-Filter**: Zeilen anhand von Regex ein-/ausblenden
- **Plot-Widget**: numerische Werte aus Tags live als Graph darstellen (Qt Charts)
- **UART senden**: TX-Eingabezeile hinzufügen für bidirektionale Kommunikation
- **Session-Replay**: gespeicherte Log-Dateien wieder abspielen
+- **Plot-Widget**: numerische Tag-Werte live als Graph darstellen (Qt Charts)
+- **UART senden**: TX-Eingabezeile für bidirektionale Kommunikation
 - **Hex-View**: rohe Bytes als Hex-Dump anzeigen
+- **Session-Replay**: gespeicherte Log-Dateien abspielen
+- **Regex-Filter**: Zeilen im Raw-View per regulärem Ausdruck ein-/ausblenden
--- a/UartscopeLogo.png
+++ b/UartscopeLogo.png
--- a/include/mainwindow.h
+++ b/include/mainwindow.h
@@ -1,5 +1,8 @@
 #pragma once
 #include <QMainWindow>
+#include <QCloseEvent>
+#include <QSettings>
+#include <QSplitter>
 #include <QThread>
 #include <QTabWidget>
 #include <QSplitter>
@@ -14,6 +17,7 @@
 #include "rawview.h"
 #include "tableview.h"
 #include "tagwidget.h"
+#include "videowidget.h"
 #include "connectdialog.h"
 #include <QSet>

@@ -37,12 +41,19 @@ private slots:
    void onTagDetected(const QString &tag, const QString &value);
    void showFormatReference();
    void configureTagFilter();
+    void showAbout();
+
+protected:
+    void closeEvent(QCloseEvent *event) override;

 private:
    void setupUi();
    void setupToolBar();
    void setupStatusBar();
    void clearAllViews();
+    void doShutdown();
+    void saveSettings();
+    void restoreSettings();

    // Worker & thread
    QThread      *m_thread = nullptr;
@@ -52,6 +63,7 @@ private:
    RawView     *m_rawView    = nullptr;
    TableView   *m_tableView  = nullptr;
    TagWidget   *m_tagWidget  = nullptr;
+    VideoWidget *m_videoWidget= nullptr;

    // Status bar widgets
    QLabel *m_portLabel       = nullptr;
@@ -66,6 +78,11 @@ private:
    QAction *m_connectAction    = nullptr;
    QAction *m_disconnectAction = nullptr;

+    // Splitters (saved/restored via QSettings)
+    QSplitter       *m_mainSplitter  = nullptr;
+    QSplitter       *m_rightSplitter = nullptr;
+
    SerialConfig    m_lastConfig;
    QSet<QString>   m_suppressedTags;   // tags hidden from Raw view
+    bool            m_shutdownDone = false;
 };
--- a/include/v4l2worker.h
+++ b/include/v4l2worker.h
@@ -0,0 +1,49 @@
+#pragma once
+#include <QObject>
+#include <QImage>
+#include <QString>
+#include <atomic>
+#include <thread>
+
+class V4l2Worker : public QObject
+{
+    Q_OBJECT
+
+public:
+    explicit V4l2Worker(QObject *parent = nullptr);
+    ~V4l2Worker();
+
+public slots:
+    void startCapture(const QString &device, int width = 1920, int height = 1080);
+    void stopCapture();
+
+signals:
+    void newFrame(const QImage &frame);
+    void captureStarted(const QString &device, int width, int height, const QString &format);
+    void captureStopped();
+    void errorOccurred(const QString &message);
+
+private:
+    void stop();           // joins m_captureThread, closes device – safe from any thread
+    void captureLoop();    // runs inside m_captureThread
+    bool openDevice(const QString &device, int width, int height);
+    void closeDevice();
+    bool initMmap();
+    void freeMmap();
+    QImage convertToImage(const void *data, size_t size, int width, int height);
+    QImage yuyv2Rgb(const uchar *src, int width, int height);
+    QImage nv122Rgb(const uchar *src, int width, int height);
+
+    int           m_fd       = -1;
+    int           m_width    = 1920;
+    int           m_height   = 1080;
+    uint32_t      m_pixFmt   = 0;
+
+    static constexpr int MMAP_BUFFERS = 4;
+    struct MmapBuffer { void *start = nullptr; size_t length = 0; };
+    MmapBuffer    m_buffers[MMAP_BUFFERS];
+    int           m_nBuffers = 0;
+
+    std::atomic<bool> m_running{false};
+    std::thread       m_captureThread;   // dedicated capture thread – not the Qt event thread
+};
--- a/include/videowidget.h
+++ b/include/videowidget.h
@@ -0,0 +1,71 @@
+#pragma once
+#include <QWidget>
+#include <QImage>
+#include <QLabel>
+#include <QPushButton>
+#include <QComboBox>
+#include <QHBoxLayout>
+#include <QVBoxLayout>
+#include <QThread>
+#include <QTimer>
+
+#include "v4l2worker.h"
+
+// VideoWidget shows a live preview of a V4L2 capture device.
+// It lives in the right-side panel, below the Tag Monitor.
+// Features:
+//   - Device selector (auto-enumerates /dev/video*)
+//   - Start / Stop capture
+//   - Freeze-frame toggle
+//   - Screenshot (saves current frame as PNG/JPG)
+//   - Frame is scaled to fit the widget while keeping aspect ratio
+class VideoWidget : public QWidget
+{
+    Q_OBJECT
+
+public:
+    explicit VideoWidget(QWidget *parent = nullptr);
+    ~VideoWidget();
+
+public:
+    // Called by MainWindow::closeEvent to guarantee orderly shutdown before
+    // widget destruction. Safe to call multiple times.
+    void shutdown();
+
+public slots:
+    void onNewFrame(const QImage &frame);
+
+private slots:
+    void onStartStop();
+    void onFreeze(bool frozen);
+    void onScreenshot();
+    void refreshDeviceList();
+
+protected:
+    void paintEvent(QPaintEvent *event) override;
+    void resizeEvent(QResizeEvent *event) override;
+
+private:
+    void setupUi();
+    void startCapture();
+    void stopCapture();
+    void updateScaled();
+
+    // Worker
+    QThread     *m_thread = nullptr;
+    V4l2Worker  *m_worker = nullptr;
+
+    // Current frame
+    QImage  m_frame;
+    QImage  m_scaled;
+    bool    m_frozen       = false;
+    bool    m_running      = false;
+    bool    m_shutdownDone = false;
+
+    // UI
+    QComboBox   *m_deviceCombo  = nullptr;
+    QPushButton *m_startBtn     = nullptr;
+    QPushButton *m_freezeBtn    = nullptr;
+    QPushButton *m_screenshotBtn= nullptr;
+    QLabel      *m_infoLabel    = nullptr;
+};
--- a/resources.qrc
+++ b/resources.qrc
@@ -0,0 +1,5 @@
+<RCC>
+    <qresource prefix="/icons">
+        <file>UartscopeLogo.png</file>
+    </qresource>
+</RCC>
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -29,6 +29,10 @@ int main(int argc, char *argv[])
    darkPalette.setColor(QPalette::HighlightedText, Qt::white);
    app.setPalette(darkPalette);

+    // Set application icon (embedded via Qt resource)
+    const QIcon appIcon(":/icons/UartscopeLogo.png");
+    app.setWindowIcon(appIcon);
+
    MainWindow w;
    w.show();
    return app.exec();
--- a/src/mainwindow.cpp
+++ b/src/mainwindow.cpp
@@ -1,4 +1,5 @@
 #include "mainwindow.h"
+#include <QSettings>
 #include <QApplication>
 #include <QClipboard>
 #include <QDialog>
@@ -23,6 +24,7 @@ MainWindow::MainWindow(QWidget *parent)
    setupUi();
    setupToolBar();
    setupStatusBar();
+    restoreSettings();

    // ── Worker thread ─────────────────────────────────────────────────────────
    m_thread = new QThread(this);
@@ -44,16 +46,48 @@ MainWindow::MainWindow(QWidget *parent)

 MainWindow::~MainWindow()
 {
+    // All real cleanup happens in closeEvent(). The destructor only runs if
+    // the window was destroyed without a close event (e.g. programmatically),
+    // so we guard against double-cleanup with m_shutdownDone.
+    doShutdown();
+}
+
+void MainWindow::closeEvent(QCloseEvent *event)
+{
+    doShutdown();
+    event->accept();
+}
+
+void MainWindow::doShutdown()
+{
+    if (m_shutdownDone)
+        return;
+    m_shutdownDone = true;
+
+    saveSettings();
+
+    // 1. Stop V4L2 capture first (joins the internal std::thread)
+    if (m_videoWidget)
+        m_videoWidget->shutdown();
+
+    // 2. Stop UART serial worker
+    if (m_thread && m_thread->isRunning()) {
        QMetaObject::invokeMethod(m_worker, "closePort", Qt::BlockingQueuedConnection);
        m_thread->quit();
-    m_thread->wait(3000);
+        m_thread->wait(5000);
+        if (m_thread->isRunning())
+            m_thread->terminate();
+    }
 }

 void MainWindow::setupUi()
 {
-    auto *mainSplitter = new QSplitter(Qt::Horizontal, this);
+    // ── Outer horizontal splitter: (Raw+Table tabs) | right panel ────────────
+    m_mainSplitter = new QSplitter(Qt::Horizontal, this);
+    auto *mainSplitter = m_mainSplitter;
    mainSplitter->setHandleWidth(5);

+    // Left: tabs for Raw and Table views
    auto *tabs = new QTabWidget(mainSplitter);
    tabs->setTabPosition(QTabWidget::South);

@@ -63,12 +97,26 @@ void MainWindow::setupUi()
    m_tableView = new TableView(tabs);
    tabs->addTab(m_tableView, tr("Table view"));

-    m_tagWidget = new TagWidget(mainSplitter);
-    m_tagWidget->setMinimumWidth(220);
-    m_tagWidget->setMaximumWidth(420);
+    // Right: vertical splitter – Tag Monitor on top, Video below
+    m_rightSplitter = new QSplitter(Qt::Vertical, mainSplitter);
+    auto *rightSplitter = m_rightSplitter;
+    rightSplitter->setHandleWidth(5);
+    rightSplitter->setMinimumWidth(240);
+    rightSplitter->setMaximumWidth(480);
+
+    m_tagWidget = new TagWidget(rightSplitter);
+    m_videoWidget = new VideoWidget(rightSplitter);
+    m_videoWidget->setMinimumHeight(160);
+
+    rightSplitter->addWidget(m_tagWidget);
+    rightSplitter->addWidget(m_videoWidget);
+    // Initial split: ~30% tags, ~70% video – user can drag to taste
+    rightSplitter->setStretchFactor(0, 1);
+    rightSplitter->setStretchFactor(1, 2);
+    rightSplitter->setSizes({330, 330});

    mainSplitter->addWidget(tabs);
-    mainSplitter->addWidget(m_tagWidget);
+    mainSplitter->addWidget(rightSplitter);
    mainSplitter->setStretchFactor(0, 3);
    mainSplitter->setStretchFactor(1, 1);

@@ -135,6 +183,12 @@ void MainWindow::setupToolBar()
    auto *helpAction = tb->addAction(tr("Format reference"));
    helpAction->setToolTip(tr("Show UARTScope output format guide (copy for AI)"));
    connect(helpAction, &QAction::triggered, this, &MainWindow::showFormatReference);
+
+    tb->addSeparator();
+
+    // ── About ─────────────────────────────────────────────────────────────────
+    auto *aboutAction = tb->addAction(tr("Über UARTScope"));
+    connect(aboutAction, &QAction::triggered, this, &MainWindow::showAbout);
 }

 void MainWindow::setupStatusBar()
@@ -444,3 +498,151 @@ void MainWindow::configureTagFilter()
    }
    dlg->deleteLater();
 }
+
+// ── Settings: save / restore ───────────────────────────────────────────────
+
+void MainWindow::saveSettings()
+{
+    QSettings s("ChicaDev", "UARTScope");
+
+    // Window geometry & state
+    s.setValue("window/geometry",    saveGeometry());
+    s.setValue("window/state",       saveState());
+
+    // Splitter sizes
+    if (m_mainSplitter)
+        s.setValue("splitter/main",  m_mainSplitter->saveState());
+    if (m_rightSplitter)
+        s.setValue("splitter/right", m_rightSplitter->saveState());
+
+    // Toolbar settings
+    s.setValue("reconnect/enabled",  m_autoReconnectCb->isChecked());
+    s.setValue("reconnect/interval", m_reconnectIntervalSb->value());
+
+    // Tag filter
+    QStringList tags(m_suppressedTags.values());
+    tags.sort();
+    s.setValue("tagfilter/suppressed", tags);
+}
+
+void MainWindow::restoreSettings()
+{
+    QSettings s("ChicaDev", "UARTScope");
+
+    // Window geometry & state
+    if (s.contains("window/geometry"))
+        restoreGeometry(s.value("window/geometry").toByteArray());
+    if (s.contains("window/state"))
+        restoreState(s.value("window/state").toByteArray());
+
+    // Splitter sizes (only restore if we have saved data)
+    if (m_mainSplitter && s.contains("splitter/main"))
+        m_mainSplitter->restoreState(s.value("splitter/main").toByteArray());
+    if (m_rightSplitter && s.contains("splitter/right"))
+        m_rightSplitter->restoreState(s.value("splitter/right").toByteArray());
+
+    // Toolbar settings
+    if (s.contains("reconnect/enabled"))
+        m_autoReconnectCb->setChecked(s.value("reconnect/enabled").toBool());
+    if (s.contains("reconnect/interval"))
+        m_reconnectIntervalSb->setValue(s.value("reconnect/interval").toInt());
+
+    // Tag filter
+    const QStringList tags = s.value("tagfilter/suppressed").toStringList();
+    m_suppressedTags.clear();
+    for (const QString &t : tags)
+        if (!t.isEmpty())
+            m_suppressedTags.insert(t);
+}
+
+// ── About dialog ──────────────────────────────────────────────────────────
+
+void MainWindow::showAbout()
+{
+    auto *dlg = new QDialog(this);
+    dlg->setWindowTitle(tr("Über UARTScope"));
+    dlg->setFixedSize(400, 280);
+
+    auto *root = new QVBoxLayout(dlg);
+    root->setContentsMargins(0, 0, 0, 0);
+    root->setSpacing(0);
+
+    // ── Header block (dark accent) ────────────────────────────────────────────
+    auto *header = new QWidget(dlg);
+    header->setFixedHeight(110);
+    header->setStyleSheet("background-color: #1e1e1e;");
+    auto *headerLayout = new QHBoxLayout(header);
+    headerLayout->setContentsMargins(20, 14, 24, 14);
+    headerLayout->setSpacing(16);
+
+    // Logo
+    auto *logoLabel = new QLabel(header);
+    const QPixmap logoPix(":/icons/UartscopeLogo.png");
+    logoLabel->setPixmap(logoPix.scaled(72, 72, Qt::KeepAspectRatio, Qt::SmoothTransformation));
+    logoLabel->setStyleSheet("background: transparent;");
+    logoLabel->setFixedSize(72, 72);
+
+    // Title + subtitle
+    auto *titleBlock = new QVBoxLayout();
+    titleBlock->setSpacing(4);
+    auto *titleLabel = new QLabel("UARTScope", header);
+    titleLabel->setStyleSheet(
+        "color: #ffffff; font-size: 26px; font-weight: bold; background: transparent;");
+    auto *subtitleLabel = new QLabel(tr("UART-Monitor & HDMI-Viewer für Baremetal-Entwicklung"), header);
+    subtitleLabel->setStyleSheet(
+        "color: #56b6c2; font-size: 11px; background: transparent;");
+    titleBlock->addWidget(titleLabel);
+    titleBlock->addWidget(subtitleLabel);
+
+    headerLayout->addWidget(logoLabel);
+    headerLayout->addLayout(titleBlock);
+    root->addWidget(header);
+
+    // ── Info grid ─────────────────────────────────────────────────────────────
+    auto *body = new QWidget(dlg);
+    body->setStyleSheet("background-color: #252526;");
+    auto *grid = new QGridLayout(body);
+    grid->setContentsMargins(24, 20, 24, 20);
+    grid->setVerticalSpacing(10);
+    grid->setHorizontalSpacing(16);
+    grid->setColumnMinimumWidth(0, 90);
+
+    const QString labelStyle = "color: #888888; font-weight: bold; background: transparent;";
+    const QString valueStyle = "color: #d4d4d4; background: transparent;";
+
+    auto addRow = [&](int row, const QString &label, const QString &value) {
+        auto *l = new QLabel(label, body);
+        auto *v = new QLabel(value, body);
+        l->setStyleSheet(labelStyle);
+        v->setStyleSheet(valueStyle);
+        l->setAlignment(Qt::AlignRight | Qt::AlignVCenter);
+        grid->addWidget(l, row, 0);
+        grid->addWidget(v, row, 1);
+    };
+
+    addRow(0, tr("Version"),     "1.0.0");
+    addRow(1, tr("Entwickler"),  "Dany Thinnes");
+    addRow(2, tr("Projekt"),     "Projekt Hirnfrei");
+    addRow(3, tr("Framework"),   QString("Qt %1").arg(QT_VERSION_STR));
+    addRow(4, tr("Sprache"),     "C++17");
+
+    root->addWidget(body, 1);
+
+    // ── Footer with close button ──────────────────────────────────────────────
+    auto *footer = new QWidget(dlg);
+    footer->setStyleSheet("background-color: #252526; border-top: 1px solid #3c3c3c;");
+    auto *footerLayout = new QHBoxLayout(footer);
+    footerLayout->setContentsMargins(16, 10, 16, 10);
+
+    auto *closeBtn = new QPushButton(tr("Schließen"), footer);
+    closeBtn->setDefault(true);
+    closeBtn->setMinimumWidth(90);
+    connect(closeBtn, &QPushButton::clicked, dlg, &QDialog::accept);
+
+    footerLayout->addStretch();
+    footerLayout->addWidget(closeBtn);
+    root->addWidget(footer);
+
+    dlg->exec();
+    dlg->deleteLater();
+}
--- a/src/v4l2worker.cpp
+++ b/src/v4l2worker.cpp
@@ -0,0 +1,288 @@
+#include "v4l2worker.h"
+
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <errno.h>
+#include <string.h>
+#include <linux/videodev2.h>
+
+#include <QBuffer>
+#include <QImageReader>
+#include <QThread>
+
+static int xioctl(int fd, unsigned long req, void *arg)
+{
+    int r;
+    do { r = ::ioctl(fd, req, arg); } while (r == -1 && errno == EINTR);
+    return r;
+}
+
+V4l2Worker::V4l2Worker(QObject *parent)
+    : QObject(parent)
+{}
+
+V4l2Worker::~V4l2Worker()
+{
+    stop();
+}
+
+// ── public slots ──────────────────────────────────────────────────────────────
+
+void V4l2Worker::startCapture(const QString &device, int width, int height)
+{
+    if (m_running.load())
+        stop();
+
+    if (!openDevice(device, width, height))
+        return;
+
+    m_running.store(true);
+
+    // Run the blocking capture loop in a plain std::thread so the Qt event
+    // loop of this worker object stays responsive to stopCapture() signals.
+    m_captureThread = std::thread([this] { captureLoop(); });
+}
+
+void V4l2Worker::stopCapture()
+{
+    stop();
+}
+
+// ── internal stop (safe to call from any thread) ──────────────────────────────
+
+void V4l2Worker::stop()
+{
+    m_running.store(false);
+    if (m_captureThread.joinable())
+        m_captureThread.join();   // wait for captureLoop() to exit
+    closeDevice();
+}
+
+// ── capture loop (runs in m_captureThread) ────────────────────────────────────
+
+void V4l2Worker::captureLoop()
+{
+    v4l2_buf_type type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+    if (xioctl(m_fd, VIDIOC_STREAMON, &type) == -1) {
+        emit errorOccurred(tr("VIDIOC_STREAMON failed: %1").arg(strerror(errno)));
+        m_running.store(false);
+        return;
+    }
+
+    while (m_running.load()) {
+        fd_set fds;
+        FD_ZERO(&fds);
+        FD_SET(m_fd, &fds);
+        timeval tv{0, 100000};   // 100 ms timeout → checks m_running 10x/sec
+        const int r = ::select(m_fd + 1, &fds, nullptr, nullptr, &tv);
+        if (r == 0) continue;
+        if (r == -1) {
+            if (errno == EINTR) continue;
+            emit errorOccurred(tr("select() failed: %1").arg(strerror(errno)));
+            break;
+        }
+
+        v4l2_buffer buf{};
+        buf.type   = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+        buf.memory = V4L2_MEMORY_MMAP;
+        if (xioctl(m_fd, VIDIOC_DQBUF, &buf) == -1) {
+            if (errno == EAGAIN) continue;
+            emit errorOccurred(tr("VIDIOC_DQBUF failed: %1").arg(strerror(errno)));
+            break;
+        }
+
+        const QImage img = convertToImage(
+            m_buffers[buf.index].start, buf.bytesused, m_width, m_height);
+        if (!img.isNull())
+            emit newFrame(img);
+
+        if (xioctl(m_fd, VIDIOC_QBUF, &buf) == -1) {
+            emit errorOccurred(tr("VIDIOC_QBUF failed: %1").arg(strerror(errno)));
+            break;
+        }
+    }
+
+    xioctl(m_fd, VIDIOC_STREAMOFF, &type);
+    emit captureStopped();
+}
+
+// ── device open / close ───────────────────────────────────────────────────────
+
+bool V4l2Worker::openDevice(const QString &device, int width, int height)
+{
+    m_width  = width;
+    m_height = height;
+
+    m_fd = ::open(device.toLocal8Bit().constData(), O_RDWR | O_NONBLOCK);
+    if (m_fd == -1) {
+        emit errorOccurred(tr("Cannot open %1: %2").arg(device, strerror(errno)));
+        return false;
+    }
+
+    v4l2_capability cap{};
+    if (xioctl(m_fd, VIDIOC_QUERYCAP, &cap) == -1) {
+        emit errorOccurred(tr("VIDIOC_QUERYCAP failed: %1").arg(strerror(errno)));
+        closeDevice();
+        return false;
+    }
+    if (!(cap.capabilities & V4L2_CAP_VIDEO_CAPTURE)) {
+        emit errorOccurred(tr("%1 is not a video capture device").arg(device));
+        closeDevice();
+        return false;
+    }
+
+    const uint32_t preferred[] = {
+        V4L2_PIX_FMT_MJPEG,
+        V4L2_PIX_FMT_YUYV,
+        V4L2_PIX_FMT_NV12,
+        0
+    };
+
+    m_pixFmt = 0;
+    for (int i = 0; preferred[i]; ++i) {
+        v4l2_format fmt{};
+        fmt.type                = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+        fmt.fmt.pix.width       = static_cast<uint32_t>(width);
+        fmt.fmt.pix.height      = static_cast<uint32_t>(height);
+        fmt.fmt.pix.pixelformat = preferred[i];
+        fmt.fmt.pix.field       = V4L2_FIELD_ANY;
+        if (xioctl(m_fd, VIDIOC_S_FMT, &fmt) == 0) {
+            m_pixFmt = fmt.fmt.pix.pixelformat;
+            m_width  = static_cast<int>(fmt.fmt.pix.width);
+            m_height = static_cast<int>(fmt.fmt.pix.height);
+            break;
+        }
+    }
+    if (!m_pixFmt) {
+        emit errorOccurred(tr("No supported pixel format found on %1").arg(device));
+        closeDevice();
+        return false;
+    }
+
+    QString fmtName;
+    switch (m_pixFmt) {
+        case V4L2_PIX_FMT_MJPEG: fmtName = "MJPEG"; break;
+        case V4L2_PIX_FMT_YUYV:  fmtName = "YUYV";  break;
+        case V4L2_PIX_FMT_NV12:  fmtName = "NV12";  break;
+        default:                  fmtName = "?";     break;
+    }
+
+    if (!initMmap()) {
+        closeDevice();
+        return false;
+    }
+
+    emit captureStarted(device, m_width, m_height, fmtName);
+    return true;
+}
+
+void V4l2Worker::closeDevice()
+{
+    freeMmap();
+    if (m_fd != -1) {
+        ::close(m_fd);
+        m_fd = -1;
+    }
+}
+
+bool V4l2Worker::initMmap()
+{
+    v4l2_requestbuffers req{};
+    req.count  = MMAP_BUFFERS;
+    req.type   = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+    req.memory = V4L2_MEMORY_MMAP;
+    if (xioctl(m_fd, VIDIOC_REQBUFS, &req) == -1) {
+        emit errorOccurred(tr("VIDIOC_REQBUFS failed: %1").arg(strerror(errno)));
+        return false;
+    }
+    m_nBuffers = static_cast<int>(req.count);
+
+    for (int i = 0; i < m_nBuffers; ++i) {
+        v4l2_buffer buf{};
+        buf.type   = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+        buf.memory = V4L2_MEMORY_MMAP;
+        buf.index  = static_cast<uint32_t>(i);
+        if (xioctl(m_fd, VIDIOC_QUERYBUF, &buf) == -1) {
+            emit errorOccurred(tr("VIDIOC_QUERYBUF failed: %1").arg(strerror(errno)));
+            return false;
+        }
+        m_buffers[i].length = buf.length;
+        m_buffers[i].start  = ::mmap(nullptr, buf.length,
+                                      PROT_READ | PROT_WRITE, MAP_SHARED,
+                                      m_fd, buf.m.offset);
+        if (m_buffers[i].start == MAP_FAILED) {
+            emit errorOccurred(tr("mmap failed: %1").arg(strerror(errno)));
+            return false;
+        }
+        if (xioctl(m_fd, VIDIOC_QBUF, &buf) == -1) {
+            emit errorOccurred(tr("VIDIOC_QBUF failed: %1").arg(strerror(errno)));
+            return false;
+        }
+    }
+    return true;
+}
+
+void V4l2Worker::freeMmap()
+{
+    for (int i = 0; i < m_nBuffers; ++i) {
+        if (m_buffers[i].start && m_buffers[i].start != MAP_FAILED) {
+            ::munmap(m_buffers[i].start, m_buffers[i].length);
+            m_buffers[i].start = nullptr;
+        }
+    }
+    m_nBuffers = 0;
+}
+
+QImage V4l2Worker::convertToImage(const void *data, size_t size, int width, int height)
+{
+    switch (m_pixFmt) {
+    case V4L2_PIX_FMT_MJPEG: {
+        QByteArray ba(static_cast<const char *>(data), static_cast<int>(size));
+        QBuffer buf(&ba);
+        QImageReader reader(&buf, "JPEG");
+        return reader.read();
+    }
+    case V4L2_PIX_FMT_YUYV:
+        return yuyv2Rgb(static_cast<const uchar *>(data), width, height);
+    case V4L2_PIX_FMT_NV12:
+        return nv122Rgb(static_cast<const uchar *>(data), width, height);
+    default:
+        return {};
+    }
+}
+
+QImage V4l2Worker::yuyv2Rgb(const uchar *src, int width, int height)
+{
+    QImage img(width, height, QImage::Format_RGB32);
+    for (int y = 0; y < height; ++y) {
+        const uchar *row = src + y * width * 2;
+        QRgb *dst = reinterpret_cast<QRgb *>(img.scanLine(y));
+        for (int x = 0; x < width; x += 2) {
+            const int Y0 = row[0], U = row[1]-128, Y1 = row[2], V = row[3]-128;
+            row += 4;
+            auto clamp = [](int v) { return static_cast<uchar>(v<0?0:v>255?255:v); };
+            dst[x]   = qRgb(clamp(Y0+1.402f*V), clamp(Y0-0.344f*U-0.714f*V), clamp(Y0+1.772f*U));
+            dst[x+1] = qRgb(clamp(Y1+1.402f*V), clamp(Y1-0.344f*U-0.714f*V), clamp(Y1+1.772f*U));
+        }
+    }
+    return img;
+}
+
+QImage V4l2Worker::nv122Rgb(const uchar *src, int width, int height)
+{
+    QImage img(width, height, QImage::Format_RGB32);
+    const uchar *uvPlane = src + width * height;
+    auto clamp = [](int v) { return static_cast<uchar>(v<0?0:v>255?255:v); };
+    for (int y = 0; y < height; ++y) {
+        const uchar *yRow  = src + y * width;
+        const uchar *uvRow = uvPlane + (y/2) * width;
+        QRgb *dst = reinterpret_cast<QRgb *>(img.scanLine(y));
+        for (int x = 0; x < width; ++x) {
+            const int Y = yRow[x], U = uvRow[x&~1]-128, V = uvRow[(x&~1)+1]-128;
+            dst[x] = qRgb(clamp(Y+1.402f*V), clamp(Y-0.344f*U-0.714f*V), clamp(Y+1.772f*U));
+        }
+    }
+    return img;
+}
--- a/src/videowidget.cpp
+++ b/src/videowidget.cpp
@@ -0,0 +1,260 @@
+#include "videowidget.h"
+
+#include <QPainter>
+#include <QFileDialog>
+#include <QDir>
+#include <QDateTime>
+#include <QStandardPaths>
+#include <QMetaObject>
+#include <QResizeEvent>
+
+// Enumerate /dev/video* entries
+static QStringList enumerateVideoDevices()
+{
+    QStringList devices;
+    const QDir dev("/dev");
+    const auto entries = dev.entryList({"video*"}, QDir::System, QDir::Name);
+    for (const auto &e : entries)
+        devices << "/dev/" + e;
+    return devices;
+}
+
+// ── ctor / dtor ───────────────────────────────────────────────────────────────
+
+VideoWidget::VideoWidget(QWidget *parent)
+    : QWidget(parent)
+{
+    setupUi();
+
+    m_thread = new QThread(this);
+    m_worker = new V4l2Worker();
+    m_worker->moveToThread(m_thread);
+
+    connect(m_thread, &QThread::finished, m_worker, &QObject::deleteLater);
+
+    connect(m_worker, &V4l2Worker::newFrame,        this, &VideoWidget::onNewFrame,
+            Qt::QueuedConnection);
+    connect(m_worker, &V4l2Worker::captureStarted,  this, [this](const QString &dev, int w, int h, const QString &fmt) {
+        m_infoLabel->setText(tr("%1  %2×%3  %4").arg(dev).arg(w).arg(h).arg(fmt));
+        m_running = true;
+        m_startBtn->setText(tr("■ Stop"));
+    });
+    connect(m_worker, &V4l2Worker::captureStopped,  this, [this] {
+        m_running = false;
+        m_startBtn->setText(tr("▶ Start"));
+        m_infoLabel->setText(tr("Stopped"));
+        update();
+    });
+    connect(m_worker, &V4l2Worker::errorOccurred,   this, [this](const QString &msg) {
+        m_infoLabel->setText(tr("Error: %1").arg(msg));
+        m_running = false;
+        m_startBtn->setText(tr("▶ Start"));
+    });
+
+    m_thread->start();
+}
+
+void VideoWidget::shutdown()
+{
+    if (m_shutdownDone)
+        return;
+    m_shutdownDone = true;
+
+    // stopCapture() sets m_running=false and joins the std::thread internally.
+    // Must happen before we quit the Qt event thread.
+    m_worker->stopCapture();
+
+    if (m_thread && m_thread->isRunning()) {
+        m_thread->quit();
+        m_thread->wait(5000);
+        if (m_thread->isRunning())
+            m_thread->terminate();
+    }
+}
+
+VideoWidget::~VideoWidget()
+{
+    shutdown();
+}
+
+// ── UI setup ─────────────────────────────────────────────────────────────────
+
+void VideoWidget::setupUi()
+{
+    setMinimumHeight(140);
+
+    auto *layout = new QVBoxLayout(this);
+    layout->setContentsMargins(2, 2, 2, 2);
+    layout->setSpacing(3);
+
+    // ── Controls row ──────────────────────────────────────────────────────────
+    auto *ctrlRow = new QHBoxLayout();
+    ctrlRow->setSpacing(4);
+
+    m_deviceCombo = new QComboBox(this);
+    m_deviceCombo->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
+    refreshDeviceList();
+
+    auto *refreshBtn = new QPushButton("↻", this);
+    refreshBtn->setMaximumWidth(26);
+    refreshBtn->setToolTip(tr("Refresh device list"));
+    connect(refreshBtn, &QPushButton::clicked, this, &VideoWidget::refreshDeviceList);
+
+    m_startBtn = new QPushButton(tr("▶ Start"), this);
+    m_startBtn->setMaximumWidth(70);
+    connect(m_startBtn, &QPushButton::clicked, this, &VideoWidget::onStartStop);
+
+    m_freezeBtn = new QPushButton(tr("❚❚ Freeze"), this);
+    m_freezeBtn->setCheckable(true);
+    m_freezeBtn->setMaximumWidth(80);
+    connect(m_freezeBtn, &QPushButton::toggled, this, &VideoWidget::onFreeze);
+
+    m_screenshotBtn = new QPushButton(tr("📷"), this);
+    m_screenshotBtn->setMaximumWidth(32);
+    m_screenshotBtn->setToolTip(tr("Save screenshot (PNG/JPG)"));
+    connect(m_screenshotBtn, &QPushButton::clicked, this, &VideoWidget::onScreenshot);
+
+    ctrlRow->addWidget(m_deviceCombo, 1);
+    ctrlRow->addWidget(refreshBtn);
+    ctrlRow->addWidget(m_startBtn);
+    ctrlRow->addWidget(m_freezeBtn);
+    ctrlRow->addWidget(m_screenshotBtn);
+    layout->addLayout(ctrlRow);
+
+    // ── Info label ────────────────────────────────────────────────────────────
+    m_infoLabel = new QLabel(tr("No device started"), this);
+    m_infoLabel->setStyleSheet("color: gray; font-size: 9px;");
+    layout->addWidget(m_infoLabel);
+
+    // The video frame is drawn directly in paintEvent – no QLabel needed.
+    // We leave stretch space for it.
+    layout->addStretch(1);
+}
+
+// ── Slots ─────────────────────────────────────────────────────────────────────
+
+void VideoWidget::onStartStop()
+{
+    if (m_running)
+        stopCapture();
+    else
+        startCapture();
+}
+
+void VideoWidget::onFreeze(bool frozen)
+{
+    m_frozen = frozen;
+    m_freezeBtn->setText(frozen ? tr("▶ Live") : tr("❚❚ Freeze"));
+}
+
+void VideoWidget::onScreenshot()
+{
+    if (m_frame.isNull())
+        return;
+
+    const QString defaultName =
+        QStandardPaths::writableLocation(QStandardPaths::PicturesLocation)
+        + "/uartscope_"
+        + QDateTime::currentDateTime().toString("yyyyMMdd_hhmmss")
+        + ".png";
+
+    const QString path = QFileDialog::getSaveFileName(
+        this, tr("Save screenshot"), defaultName,
+        tr("PNG Image (*.png);;JPEG Image (*.jpg *.jpeg)"));
+
+    if (!path.isEmpty())
+        m_frame.save(path);
+}
+
+void VideoWidget::onNewFrame(const QImage &frame)
+{
+    if (m_frozen)
+        return;
+    m_frame = frame;
+    updateScaled();
+    update();   // trigger paintEvent
+}
+
+void VideoWidget::refreshDeviceList()
+{
+    const QString current = m_deviceCombo->currentText();
+    m_deviceCombo->clear();
+    const auto devices = enumerateVideoDevices();
+    for (const auto &d : devices)
+        m_deviceCombo->addItem(d);
+    // Restore previous selection if still present
+    const int idx = m_deviceCombo->findText(current);
+    if (idx >= 0)
+        m_deviceCombo->setCurrentIndex(idx);
+}
+
+// ── Capture start/stop ────────────────────────────────────────────────────────
+
+void VideoWidget::startCapture()
+{
+    const QString dev = m_deviceCombo->currentText();
+    if (dev.isEmpty())
+        return;
+    m_frame = QImage();
+    m_scaled = QImage();
+    // startCapture blocks in the worker thread until stopCapture() is called
+    QMetaObject::invokeMethod(m_worker, "startCapture",
+        Qt::QueuedConnection,
+        Q_ARG(QString, dev),
+        Q_ARG(int, 1920),
+        Q_ARG(int, 1080));
+}
+
+void VideoWidget::stopCapture()
+{
+    QMetaObject::invokeMethod(m_worker, "stopCapture", Qt::QueuedConnection);
+}
+
+// ── Paint ─────────────────────────────────────────────────────────────────────
+
+void VideoWidget::updateScaled()
+{
+    // Video area = widget height minus the two control rows (~55 px)
+    const QRect videoRect(0, 55, width(), height() - 55);
+    if (videoRect.width() < 10 || videoRect.height() < 10 || m_frame.isNull())
+        return;
+
+    m_scaled = m_frame.scaled(videoRect.size(), Qt::KeepAspectRatio,
+                               Qt::SmoothTransformation);
+}
+
+void VideoWidget::paintEvent(QPaintEvent *)
+{
+    QPainter p(this);
+
+    // Background
+    p.fillRect(rect(), QColor(0x10, 0x10, 0x10));
+
+    if (m_scaled.isNull()) {
+        p.setPen(QColor(0x44, 0x44, 0x44));
+        p.drawText(rect(), Qt::AlignCenter,
+                   m_running ? tr("Waiting for frames…") : tr("No signal"));
+        return;
+    }
+
+    // Centre the scaled frame in the video area
+    const QRect videoRect(0, 55, width(), height() - 55);
+    const QPoint origin(
+        videoRect.left() + (videoRect.width()  - m_scaled.width())  / 2,
+        videoRect.top()  + (videoRect.height() - m_scaled.height()) / 2);
+    p.drawImage(origin, m_scaled);
+
+    // Frozen overlay
+    if (m_frozen) {
+        p.setPen(QColor(0xff, 0xcc, 0x00));
+        p.setFont(QFont("Sans", 9, QFont::Bold));
+        p.drawText(videoRect.adjusted(4, 4, -4, -4),
+                   Qt::AlignTop | Qt::AlignRight, tr("FREEZE"));
+    }
+}
+
+void VideoWidget::resizeEvent(QResizeEvent *event)
+{
+    QWidget::resizeEvent(event);
+    updateScaled();
+}
--- a/uartscope-git/PKGBUILD
+++ b/uartscope-git/PKGBUILD
@@ -1,6 +1,6 @@
 # Maintainer: diabolus <your@email.com>
 pkgname=uartscope
-pkgver=1.0.0.r0.gcc102c9
+pkgver=1.0.0.r1.g2181f25
 pkgrel=1
 pkgdesc="Qt6-based UART serial monitor with tag monitoring, table view and auto-reconnect"
 arch=('x86_64' 'aarch64')
--- a/uartscope-git/pkg/uartscope/.BUILDINFO
+++ b/uartscope-git/pkg/uartscope/.BUILDINFO
@@ -1,11 +1,11 @@
 format = 2
 pkgname = uartscope
 pkgbase = uartscope
-pkgver = 1.0.0.r0.gcc102c9-1
+pkgver = 1.0.0.r1.g2181f25-1
 pkgarch = x86_64
-pkgbuild_sha256sum = b55d7f4f6a11dd33fc6e311f94ea98ca2ad601fa044e110b56af77a00ec7cdbc
+pkgbuild_sha256sum = 367d5f02c03027788d532bdeda7084f79008b9dcf902393b209ad7f2ae43859c
 packager = Unknown Packager
-builddate = 1780954815
+builddate = 1780988717
 builddir = /home/diabolus/Arbeit/Projekt-Hirnfrei/uartscope/uartscope-git
 startdir = /home/diabolus/Arbeit/Projekt-Hirnfrei/uartscope/uartscope-git
 buildtool = makepkg
@@ -287,7 +287,7 @@ installed = dhcpcd-10.3.2-1-x86_64
 installed = dialog-1:1.3_20260107-1-x86_64
 installed = diffutils-3.12-2-x86_64
 installed = ding-libs-0.7.0-1-x86_64
-installed = discord-1:1.0.141-1-x86_64
+installed = discord-1:1.0.142-1-x86_64
 installed = discount-3.0.1.2-1-x86_64
 installed = djvulibre-3.5.30-1-x86_64
 installed = dkms-3.4.1-1-any
@@ -399,7 +399,7 @@ installed = freeglut-3.8.0-1-x86_64
 installed = freeoffice-1234-1-x86_64
 installed = freerdp-2:3.26.0-1-x86_64
 installed = freetype2-2.14.3-1-x86_64
-installed = frei0r-plugins-3.1.3-1-x86_64
+installed = frei0r-plugins-3.2.0-1-x86_64
 installed = fribidi-1.0.16-2-x86_64
 installed = fritzing-1.0.7-2-x86_64
 installed = fs-uae-3.2.35-2-x86_64
@@ -525,7 +525,7 @@ installed = go-tools-4:0.45.0-1-x86_64
 installed = gobject-introspection-1.86.0-2-x86_64
 installed = gobject-introspection-runtime-1.86.0-2-x86_64
 installed = gom-0.5.6-1-x86_64
-installed = google-chrome-149.0.7827.53-1-x86_64
+installed = google-chrome-149.0.7827.102-1-x86_64
 installed = google-earth-pro-7.3.7.1155-1-x86_64
 installed = google-glog-0.7.1-2-x86_64
 installed = goverlay-1.8.2-1-x86_64
@@ -814,7 +814,7 @@ installed = kservice5-5.116.0-3-x86_64
 installed = ksmtp-26.04.2-1-x86_64
 installed = kstatusnotifieritem-6.26.0-2-x86_64
 installed = ksvg-6.26.0-2-x86_64
-installed = ksystemstats-6.6.5-1-x86_64
+installed = ksystemstats-6.6.5-2-x86_64
 installed = ktextaddons-2.0.2-1-x86_64
 installed = ktexteditor-6.26.0-1-x86_64
 installed = ktexttemplate-6.26.0-2-x86_64
@@ -829,7 +829,7 @@ installed = kwayland-6.6.5-1-x86_64
 installed = kwayland5-5.116.0-2-x86_64
 installed = kwidgetsaddons-6.26.0-1-x86_64
 installed = kwidgetsaddons5-5.116.0-2-x86_64
-installed = kwin-6.6.5-3-x86_64
+installed = kwin-6.6.5-4-x86_64
 installed = kwindowsystem-6.26.0-2-x86_64
 installed = kwindowsystem5-5.116.0-2-x86_64
 installed = kxmlgui-6.26.0-1-x86_64
@@ -992,7 +992,7 @@ installed = lib32-pipewire-jack-1:1.6.6-1-x86_64
 installed = lib32-pixman-0.46.4-1-x86_64
 installed = lib32-popt-1.19-2-x86_64
 installed = lib32-rust-libs-1:1.96.0-1-x86_64
-installed = lib32-sdl2-compat-2.32.68-1-x86_64
+installed = lib32-sdl2-compat-2.32.70-1-x86_64
 installed = lib32-sdl3-3.4.10-1-x86_64
 installed = lib32-speex-1.2.1-2-x86_64
 installed = lib32-spirv-tools-1:1.4.350.0-1-x86_64
@@ -1184,7 +1184,7 @@ installed = libkleo-26.04.2-1-x86_64
 installed = libksba-1.8.0-1-x86_64
 installed = libkscreen-6.6.5-1-x86_64
 installed = libksieve-26.04.2-1-x86_64
-installed = libksysguard-6.6.5-1-x86_64
+installed = libksysguard-6.6.5-2-x86_64
 installed = liblc3-1.1.3-2-x86_64
 installed = libldac-2.0.2.3-3-x86_64
 installed = libldap-2.6.13-1-x86_64
@@ -1939,7 +1939,7 @@ installed = python-dbus-1.4.0-2-x86_64
 installed = python-decorator-5.3.1-1-any
 installed = python-defusedxml-0.7.1-8-any
 installed = python-dill-0.4.1-1-any
-installed = python-distlib-0.4.1-1-any
+installed = python-distlib-0.4.2-1-any
 installed = python-distro-1.9.0-4-any
 installed = python-distutils-extra-2.39-15-any
 installed = python-django-5.2.13-1-any
@@ -2121,7 +2121,7 @@ installed = python-smartypants-2.0.2-2-any
 installed = python-sniffio-1.3.1-5-any
 installed = python-snowballstemmer-3.1.1-1-any
 installed = python-sortedcontainers-2.4.0-8-any
-installed = python-soundfile-0.13.1-1-any
+installed = python-soundfile-0.14.0-1-any
 installed = python-soupsieve-2.8.4-1-any
 installed = python-soxr-1.1.0-2-x86_64
 installed = python-sphinx-9.1.0-1-any
@@ -2169,7 +2169,7 @@ installed = python-uv-build-0.11.19-1-x86_64
 installed = python-vcs-versioning-1.1.1-1-any
 installed = python-vdf-4.0-5-any
 installed = python-virtualenv-21.4.2-1-any
-installed = python-wcwidth-0.8.0-1-any
+installed = python-wcwidth-0.8.1-1-any
 installed = python-webencodings-0.5.1-13-any
 installed = python-websocket-client-1.9.0-3-any
 installed = python-websockets-16.0-1-x86_64
@@ -2432,7 +2432,7 @@ installed = scummvm-2026.2.0-1-x86_64
 installed = sddm-0.21.0-7-x86_64
 installed = sddm-sugar-candy-git-1.6r42.d31dbf5-1-any
 installed = sdl12-compat-1.2.68-2-x86_64
-installed = sdl2-compat-2.32.68-1-x86_64
+installed = sdl2-compat-2.32.70-1-x86_64
 installed = sdl2_image-2.8.12-1-x86_64
 installed = sdl2_mixer-2.8.2-1-x86_64
 installed = sdl2_net-2:2.4.0-1-x86_64
@@ -2790,6 +2790,7 @@ installed = ttf-ubuntu-font-family-1:0.83-2-any
 installed = tumbler-4.20.1-1-x86_64
 installed = twolame-0.4.0-4-x86_64
 installed = tzdata-2026b-1-x86_64
+installed = uartscope-1.0.0.r0.gcc102c9-1-x86_64
 installed = uchardet-0.0.8-4-x86_64
 installed = udisks2-2.11.1-2-x86_64
 installed = unifdef-2.12-4-x86_64
@@ -2828,7 +2829,7 @@ installed = virtualbox-7.2.8-2-x86_64
 installed = virtualbox-guest-iso-7.2.8-1-any
 installed = virtualbox-host-dkms-7.2.8-2-x86_64
 installed = virtualgl-3.1.4-1-x86_64
-installed = visual-studio-code-bin-1.123.0-5-x86_64
+installed = visual-studio-code-bin-1.123.0-6-x86_64
 installed = vivaldi-8.0.4033.44-1-x86_64
 installed = vivaldi-ffmpeg-codecs-148.0.7778.256-1-x86_64
 installed = vlc-3.0.23_2-6-x86_64
--- a/uartscope-git/pkg/uartscope/.MTREE
+++ b/uartscope-git/pkg/uartscope/.MTREE
--- a/uartscope-git/pkg/uartscope/.PKGINFO
+++ b/uartscope-git/pkg/uartscope/.PKGINFO
@@ -3,12 +3,12 @@
 pkgname = uartscope
 pkgbase = uartscope
 xdata = pkgtype=pkg
-pkgver = 1.0.0.r0.gcc102c9-1
+pkgver = 1.0.0.r1.g2181f25-1
 pkgdesc = Qt6-based UART serial monitor with tag monitoring, table view and auto-reconnect
 url = https://git.projekt-hirnfrei.de/diabolus/uartscope
-builddate = 1780954815
+builddate = 1780988717
 packager = Unknown Packager
-size = 176146
+size = 209170
 arch = x86_64
 license = MIT
 conflict = uartscope
--- a/uartscope-git/pkg/uartscope/usr/bin/uartscope
+++ b/uartscope-git/pkg/uartscope/usr/bin/uartscope
--- a/uartscope-git/src/uartscope
+++ b/uartscope-git/src/uartscope
--- a/uartscope-git/uartscope/FETCH_HEAD
+++ b/uartscope-git/uartscope/FETCH_HEAD
@@ -1,2 +1,2 @@
-cc102c93eb17f7b910d8e74c3505f198bed77f10	not-for-merge	branch 'main' of https://git.projekt-hirnfrei.de/diabolus/uartscope
+2181f254d29960cffe3b1f6158a97b3c65fb0d15	not-for-merge	branch 'main' of https://git.projekt-hirnfrei.de/diabolus/uartscope
 cc102c93eb17f7b910d8e74c3505f198bed77f10	not-for-merge	tag 'v1.0.0' of https://git.projekt-hirnfrei.de/diabolus/uartscope
--- a/uartscope.desktop.in
+++ b/uartscope.desktop.in
@@ -2,7 +2,7 @@
 Name=UARTScope
 Comment=UART Serial Monitor
 Exec=uartscope
-Icon=utilities-terminal
+Icon=uartscope
 Terminal=false
 Type=Application
 Categories=Development;Utility;