Doc: Fix minor typos

Task-number: QTWEBSITE-514
Change-Id: Ie8f3689d18d15fd0e88e0ada4a745d9994d9c2ae
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>

src/imports/audioengine/qdeclarative_soundinstance_p.cpp

@@ -442,7 +442,7 @@ void QDeclarativeSoundInstance::setVelocity(const QVector3D& velocity)
 /*!
     \qmlproperty vector3d QtAudioEngine1::SoundInstance::gain
 
-    This property holds the gain adjustment which will be used to modulate the audio ouput level
+    This property holds the gain adjustment which will be used to modulate the audio output level
     from this SoundInstance.
 */
 qreal QDeclarativeSoundInstance::gain() const

src/imports/multimedia/Video.qml

@@ -113,12 +113,12 @@ Item {
         \li VideoOutput.Stretch - the video is scaled to fit
         \li VideoOutput.PreserveAspectFit - the video is scaled uniformly to fit without
             cropping
-        \li VideoOuput.PreserveAspectCrop - the video is scaled uniformly to fill, cropping
+        \li VideoOutput.PreserveAspectCrop - the video is scaled uniformly to fill, cropping
             if necessary
         \endlist
 
         Because this type is for convenience in QML, it does not
-        support enumerations directly, so enumerations from \c VideoOuput are
+        support enumerations directly, so enumerations from \c VideoOutput are
         used to access the available fill modes.
 
         The default fill mode is preserveAspectFit.

src/plugins/avfoundation/mediaplayer/avfmediaplayersession.mm

@@ -447,7 +447,7 @@ void AVFMediaPlayerSession::setVideoOutput(AVFVideoOutput *output)
     if (m_videoOutput == output)
         return;
 
-    //Set the current ouput layer to null to stop rendering
+    //Set the current output layer to null to stop rendering
     if (m_videoOutput) {
         m_videoOutput->setLayer(0);
     }

src/plugins/avfoundation/mediaplayer/avfvideooutput.h

@@ -54,7 +54,7 @@ public:
 };
 
 #define AVFVideoOutput_iid \
-    "org.qt-project.qt.AVFVideoOuput/5.0"
+    "org.qt-project.qt.AVFVideoOutput/5.0"
 Q_DECLARE_INTERFACE(AVFVideoOutput, AVFVideoOutput_iid)
 
 QT_END_NAMESPACE