Fixes

remove Brindosch's V4L2 stream notifier adaption
avoid compilation 'note' on GCC 6 ARM

libsrc/grabber/v4l2/V4L2Grabber.cpp

@@ -18,7 +18,6 @@
 
 #include <QDirIterator>
 #include <QFileInfo>
-#include <QTimer>
 
 #include "grabber/V4L2Grabber.h"
 
@@ -52,12 +51,7 @@ V4L2Grabber::V4L2Grabber(const QString & device
 	, _streamNotifier(nullptr)
 	, _initialized(false)
 	, _deviceAutoDiscoverEnabled(false)
-	, _readFrameAdaptTimer(new QTimer(this))
 {
-	// setup stream notify locker with 10hz
-	connect(_readFrameAdaptTimer, &QTimer::timeout, this, &V4L2Grabber::unlockReadFrame);
-	_readFrameAdaptTimer->setInterval(100);
-
 	setPixelDecimation(pixelDecimation);
 	getV4Ldevices();
 
@@ -77,7 +71,6 @@ void V4L2Grabber::uninit()
 	{
 		Debug(_log,"uninit grabber: %s", QSTRING_CSTR(_deviceName));
 
-		_readFrameAdaptTimer->stop();
 		stop();
 		uninit_device();
 		close_device();
@@ -146,7 +139,6 @@ bool V4L2Grabber::init()
 				opened = true;
 				init_device(_videoStandard, _input);
 				_initialized = true;
-				_readFrameAdaptTimer->start();
 			}
 		}
 		catch(std::exception& e)
@@ -715,10 +707,6 @@ void V4L2Grabber::stop_capturing()
 
 int V4L2Grabber::read_frame()
 {
-	// read_frame() is called with 25Hz, adapt to 10Hz. In the end it's up to the stream notifier if we get calls or not
-	if(!_readFrame) return -1;
-	_readFrame = false;
-
 	bool rc = false;
 
 	try