diff --git a/tools/chatgui/src/streamplayer_window.cpp b/tools/chatgui/src/streamplayer_window.cpp
index 894d8650..f6238b1d 100644
--- a/tools/chatgui/src/streamplayer_window.cpp
+++ b/tools/chatgui/src/streamplayer_window.cpp
@@ -127,9 +127,10 @@ StreamPlayerWindow::StreamPlayerWindow(uint64_t group, uint64_t source, uint64_t
     m_playback->group = group; m_playback->source = source; m_playback->epoch = epoch;
     DEBUG_INFO(DEBUG_CATEGORY_STREAM, "desktop viewer requested id=%llu source=%llx epoch=%llx",
         (unsigned long long)m_playback->id, (unsigned long long)source, (unsigned long long)epoch);
-    setWindowTitle(text("Live stream: %1").arg(name)); resize(800, 500);
+    resize(800, 500);
     setObjectName(QStringLiteral("streamPlayer_%1").arg(source));
-    auto* layout = new QVBoxLayout(this); auto* title = new QLabel(name, this); layout->addWidget(title);
+    auto* layout = new QVBoxLayout(this); m_title = new QLabel(this); layout->addWidget(m_title);
+    setSourceName(name);
     m_status = new QLabel(text("Connecting…"), this); layout->addWidget(m_status);
     m_render = new VideoRenderWidget(this, true); layout->addWidget(m_render, 1);
     m_telemetry = new QLabel(this); m_telemetry->setObjectName(QStringLiteral("streamTelemetry"));
@@ -145,7 +146,7 @@ StreamPlayerWindow::StreamPlayerWindow(uint64_t group, uint64_t source, uint64_t
     auto* close = new QPushButton(text("Close player"), this); controls->addWidget(close); layout->addLayout(controls);
     if (embedded) {
         fullscreen->hide(); close->hide(); layout->setContentsMargins(3, 3, 3, 3); layout->setSpacing(2);
-        title->setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Preferred); title->setToolTip(name);
+        m_title->setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Preferred);
         m_status->setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Preferred); setMinimumSize(0, 0);
     }
     connect(volume, &QSlider::valueChanged, this, [this](int value) { m_playback->volume = value / 100.0f; });
@@ -160,6 +161,15 @@ StreamPlayerWindow::StreamPlayerWindow(uint64_t group, uint64_t source, uint64_t
 
 StreamPlayerWindow::~StreamPlayerWindow() { stop(); }
 
+/* Имя относится к представлению, а не идентичности media-сессии. */
+void StreamPlayerWindow::setSourceName(const QString& name) {
+    m_title->setText(name); m_title->setToolTip(name);
+    setWindowTitle(text("Live stream: %1").arg(name));
+    DEBUG_DEBUG(DEBUG_CATEGORY_STREAM, "desktop viewer name id=%llu source=%llx epoch=%llx name=%s",
+        (unsigned long long)m_playback->id, (unsigned long long)m_playback->source,
+        (unsigned long long)m_playback->epoch, qPrintable(name));
+}
+
 bool StreamPlayerWindow::finished() const { return m_playback->complete; }
 bool StreamPlayerWindow::failed() const { return m_playback->failed; }
 int StreamPlayerWindow::drainTimeoutMs() const {
diff --git a/tools/chatgui/src/streamplayer_window.h b/tools/chatgui/src/streamplayer_window.h
index 8311a1ff..d3f2f8b9 100644
--- a/tools/chatgui/src/streamplayer_window.h
+++ b/tools/chatgui/src/streamplayer_window.h
@@ -19,6 +19,8 @@ public:
     explicit StreamPlayerWindow(uint64_t group, uint64_t source, uint64_t epoch, const QString& name,
                                 QWidget* parent = nullptr, bool embedded = false);
     ~StreamPlayerWindow() override;
+    // GUI-поток: обновить подпись, tooltip и заголовок окна; decoder, reader, аудиочасы и громкость сохраняются.
+    void setSourceName(const QString& name);
     void stop();
     bool finished() const;
     bool failed() const;
@@ -35,6 +37,7 @@ private:
     bool m_audioAttached = false;
     QTimer m_timer;
     VideoRenderWidget* m_render = nullptr;
+    QLabel* m_title = nullptr; // Подпись источника; принадлежит QObject-дереву окна, меняется без перезапуска playback.
     QLabel* m_status = nullptr;
     QLabel* m_telemetry = nullptr;
     int64_t m_telemetryAt = 0;