Define how long to wait for RTSP frame before deciding the link is gone.

src/Settings/Video.SettingsGroup.json

@@ -69,5 +69,14 @@
     "min":              100,
     "units":            "MB",
     "defaultValue":     2048
+},
+{
+    "name":             "RtspTimeout",
+    "shortDescription": "RTSP Video Timeout",
+    "longDescription":  "How long to wait before assuming RTSP link is gone.",
+    "type":             "uint32",
+    "min":              1,
+    "units":            "s",
+    "defaultValue":     2
 }
 ]

src/Settings/VideoSettings.cc

@@ -27,6 +27,7 @@ const char* VideoSettings::videoGridLinesName =     "VideoGridLines";
 const char* VideoSettings::showRecControlName =     "ShowRecControl";
 const char* VideoSettings::recordingFormatName =    "RecordingFormat";
 const char* VideoSettings::maxVideoSizeName =       "MaxVideoSize";
+const char* VideoSettings::rtspTimeoutName =        "RtspTimeout";
 
 const char* VideoSettings::videoSourceNoVideo =     "No Video Available";
 const char* VideoSettings::videoDisabled =          "Video Stream Disabled";
@@ -43,6 +44,7 @@ VideoSettings::VideoSettings(QObject* parent)
     , _showRecControlFact(NULL)
     , _recordingFormatFact(NULL)
     , _maxVideoSizeFact(NULL)
+    , _rtspTimeoutFact(NULL)
 {
     QQmlEngine::setObjectOwnership(this, QQmlEngine::CppOwnership);
     qmlRegisterUncreatableType<VideoSettings>("QGroundControl.SettingsManager", 1, 0, "VideoSettings", "Reference only");
@@ -153,3 +155,12 @@ Fact* VideoSettings::maxVideoSize(void)
 
     return _maxVideoSizeFact;
 }
+
+Fact* VideoSettings::rtspTimeout(void)
+{
+    if (!_rtspTimeoutFact) {
+        _rtspTimeoutFact = _createSettingsFact(rtspTimeoutName);
+    }
+
+    return _rtspTimeoutFact;
+}

src/Settings/VideoSettings.h

@@ -27,6 +27,7 @@ public:
     Q_PROPERTY(Fact* showRecControl     READ showRecControl     CONSTANT)
     Q_PROPERTY(Fact* recordingFormat    READ recordingFormat    CONSTANT)
     Q_PROPERTY(Fact* maxVideoSize       READ maxVideoSize       CONSTANT)
+    Q_PROPERTY(Fact* rtspTimeout        READ rtspTimeout        CONSTANT)
 
     Fact* videoSource       (void);
     Fact* udpPort           (void);
@@ -36,6 +37,7 @@ public:
     Fact* showRecControl    (void);
     Fact* recordingFormat   (void);
     Fact* maxVideoSize      (void);
+    Fact* rtspTimeout      (void);
 
     static const char* videoSettingsGroupName;
 
@@ -47,6 +49,7 @@ public:
     static const char* showRecControlName;
     static const char* recordingFormatName;
     static const char* maxVideoSizeName;
+    static const char* rtspTimeoutName;
 
     static const char* videoSourceNoVideo;
     static const char* videoDisabled;
@@ -62,6 +65,7 @@ private:
     SettingsFact* _showRecControlFact;
     SettingsFact* _recordingFormatFact;
     SettingsFact* _maxVideoSizeFact;
+    SettingsFact* _rtspTimeoutFact;
 };
 
 #endif

src/VideoStreaming/VideoReceiver.cc

@@ -768,12 +768,13 @@ VideoReceiver::_updateTimer()
             }
         }
         if(_videoRunning) {
+            uint32_t timeout = qgcApp()->toolbox()->settingsManager()->videoSettings()->rtspTimeout()->rawValue().toUInt();
             time_t elapsed = 0;
             time_t lastFrame = _videoSurface->lastFrame();
             if(lastFrame != 0) {
                 elapsed = time(0) - _videoSurface->lastFrame();
             }
-            if(elapsed > 2 && _videoSurface) {
+            if(elapsed > timeout && _videoSurface) {
                 stop();
             }
         } else {