Allow disabling video recording

src/FlightDisplay/FlightDisplayView.qml

@@ -268,7 +268,7 @@ QGCView {
             anchors.right:      _flightVideo.right
             height:             ScreenTools.defaultFontPixelHeight * 2
             width:              height
-            visible:            QGroundControl.videoManager.videoRunning
+            visible:            QGroundControl.videoManager.videoRunning && QGroundControl.videoManager.recordingEnabled
             opacity:            0.75
 
             Rectangle {

src/FlightDisplay/VideoManager.cc

@@ -29,12 +29,15 @@
 static const char* kVideoSourceKey  = "VideoSource";
 static const char* kVideoUDPPortKey = "VideoUDPPort";
 static const char* kVideoRTSPUrlKey = "VideoRTSPUrl";
-static const char* kVideoSavePathKey = "VideoSavePath";
+static const char* kNoVideo         = "No Video Available";
+
 #if defined(QGC_GST_STREAMING)
+#if defined(QGC_ENABLE_VIDEORECORDING)
+static const char* kVideoSavePathKey= "VideoSavePath";
+#endif
 static const char* kUDPStream       = "UDP Video Stream";
 static const char* kRTSPStream      = "RTSP Video Stream";
 #endif
-static const char* kNoVideo         = "No Video Available";
 
 QGC_LOGGING_CATEGORY(VideoManagerLog, "VideoManagerLog")
 
@@ -83,7 +86,9 @@ VideoManager::setToolbox(QGCToolbox *toolbox)
        setUdpPort(settings.value(kVideoUDPPortKey, 5600).toUInt());
        setRtspURL(settings.value(kVideoRTSPUrlKey, "rtsp://192.168.42.1:554/live").toString()); //-- Example RTSP URL
    }
+#if defined(QGC_ENABLE_VIDEORECORDING)
    setVideoSavePath(settings.value(kVideoSavePathKey, QDir::homePath()).toString());
+#endif
 #endif
    _init = true;
 #if defined(QGC_GST_STREAMING)
@@ -192,18 +197,26 @@ VideoManager::setRtspURL(QString url)
 
 void
 VideoManager::setVideoSavePathByUrl(QUrl url) {
+#if defined(QGC_ENABLE_VIDEORECORDING)
     setVideoSavePath(url.toLocalFile());
+#else
+    Q_UNUSED(url);
+#endif
 }
 
 void
 VideoManager::setVideoSavePath(QString path)
 {
+#if defined(QGC_ENABLE_VIDEORECORDING)
     _videoSavePath = path;
     QSettings settings;
     settings.setValue(kVideoSavePathKey, path);
     if(_videoReceiver)
         _videoReceiver->setVideoSavePath(_videoSavePath);
     emit videoSavePathChanged();
+#else
+    Q_UNUSED(path);
+#endif
 }
 
 //-----------------------------------------------------------------------------
@@ -277,14 +290,16 @@ void VideoManager::_updateVideo()
             delete _videoSurface;
         _videoSurface  = new VideoSurface;
         _videoReceiver = new VideoReceiver(this);
-        #if defined(QGC_GST_STREAMING)
+#if defined(QGC_GST_STREAMING)
         _videoReceiver->setVideoSink(_videoSurface->videoSink());
         if(_videoSource == kUDPStream)
             _videoReceiver->setUri(QStringLiteral("udp://0.0.0.0:%1").arg(_udpPort));
         else
             _videoReceiver->setUri(_rtspURL);
+#if defined(QGC_ENABLE_VIDEORECORDING)
         _videoReceiver->setVideoSavePath(_videoSavePath);
-        #endif
+#endif
+#endif
         _videoReceiver->start();
     }
 }

src/FlightDisplay/VideoManager.h

@@ -42,6 +42,7 @@ public:
     Q_PROPERTY(bool             uvcEnabled          READ    uvcEnabled                                  CONSTANT)
     Q_PROPERTY(VideoSurface*    videoSurface        MEMBER  _videoSurface                               CONSTANT)
     Q_PROPERTY(VideoReceiver*   videoReceiver       MEMBER  _videoReceiver                              CONSTANT)
+    Q_PROPERTY(bool             recordingEnabled    READ    recordingEnabled                            CONSTANT)
 
     Q_INVOKABLE void setVideoSavePathByUrl (QUrl url);
 
@@ -61,6 +62,12 @@ public:
     bool        uvcEnabled          ();
 #endif
 
+#if defined(QGC_GST_STREAMING) && defined(QGC_ENABLE_VIDEORECORDING)
+    bool        recordingEnabled    () { return true; }
+#else
+    bool        recordingEnabled    () { return false; }
+#endif
+
     void        setVideoSource          (QString vSource);
     void        setUdpPort              (quint16 port);
     void        setRtspURL              (QString url);

src/VideoStreaming/VideoReceiver.cc

@@ -346,10 +346,14 @@ void VideoReceiver::setUri(const QString & uri)
     _uri = uri;
 }
 
-void VideoReceiver::setVideoSavePath(const QString & path)
+void VideoReceiver::setVideoSavePath(const QString& path)
 {
+#if defined(QGC_ENABLE_VIDEORECORDING)
     _path = path;
     qCDebug(VideoReceiverLog) << "New Path:" << _path;
+#else
+    Q_UNUSED(path);
+#endif
 }
 
 #if defined(QGC_GST_STREAMING)
@@ -452,7 +456,8 @@ gboolean VideoReceiver::_onBusMessage(GstBus* bus, GstMessage* msg, gpointer dat
 //                                        +--------------------------------------+
 void VideoReceiver::startRecording(void)
 {
-#if defined(QGC_GST_STREAMING)
+#if defined(QGC_GST_STREAMING) && defined(QGC_ENABLE_VIDEORECORDING)
+
     qCDebug(VideoReceiverLog) << "startRecording()";
     // exit immediately if we are already recording
     if(_pipeline == NULL || _recording) {
@@ -506,7 +511,7 @@ void VideoReceiver::startRecording(void)
 
 void VideoReceiver::stopRecording(void)
 {
-#if defined(QGC_GST_STREAMING)
+#if defined(QGC_GST_STREAMING) && defined(QGC_ENABLE_VIDEORECORDING)
     qCDebug(VideoReceiverLog) << "stopRecording()";
     // exit immediately if we are not recording
     if(_pipeline == NULL || !_recording) {

src/VideoStreaming/VideoStreaming.pri

@@ -120,6 +120,15 @@ VideoEnabled {
 
     message("Including support for video streaming")
 
+    contains (CONFIG, DISABLE_VIDEORECORDING) {
+        message("Skipping support for video recording (manual override from command line)")
+    # Otherwise the user can still disable this feature in the user_config.pri file.
+    } else:exists($$BASEDIR/user_config.pri):infile($$BASEDIR/user_config.pri, DEFINES, DISABLE_VIDEORECORDING) {
+        message("Skipping support for video recording (manual override from user_config.pri)")
+    } else {
+        DEFINES += QGC_ENABLE_VIDEORECORDING
+    }
+
     DEFINES += \
         QGC_GST_STREAMING \
         GST_PLUGIN_BUILD_STATIC \

src/ui/preferences/GeneralSettings.qml

@@ -535,7 +535,7 @@ QGCView {
                         }
                         Row {
                             spacing:    ScreenTools.defaultFontPixelWidth
-                            visible:    QGroundControl.videoManager.isGStreamer
+                            visible:    QGroundControl.videoManager.isGStreamer && QGroundControl.videoManager.recordingEnabled
                             QGCLabel {
                                 anchors.baseline:   pathField.baseline
                                 text:               qsTr("Save Path:")