- Log file and minor changes.

- PD Video uses noaudio option to avoid blocking the device

src/main.cpp

@@ -19,10 +19,36 @@
 #include <QApplication>
 #include "libremediaserver.h"
 
+void MessageHandler(QtMsgType type, const char *msg)
+{
+    QString txt;
+    switch (type) {
+    case QtDebugMsg:
+        txt = QString("Debug: %1").arg(msg);
+        break;
+    case QtWarningMsg:
+        txt = QString("Warning: %1").arg(msg);
+    break;
+    case QtCriticalMsg:
+        txt = QString("Critical: %1").arg(msg);
+    break;
+    case QtFatalMsg:
+        txt = QString("Fatal: %1").arg(msg);
+        abort();
+    }
+    QFile outFile("log.txt");
+    outFile.open(QIODevice::WriteOnly | QIODevice::Append);
+    QTextStream ts(&outFile);
+    ts << txt << endl;
+}
+
 int main(int argc, char *argv[])
 {
   QApplication app(argc, argv);
+  qInstallMsgHandler(MessageHandler);
   libreMediaServer libreMediaServer;
   libreMediaServer.show();
   return app.exec();
 }
+
+