Add some recent things to the overview docs.

Also clean up a few other doc related bits and pieces.

Change-Id: I56714e1811e38a7225131c1d141430b49f5f509c
Reviewed-by: Jonas Rabbe <jonas.rabbe@nokia.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/doc/src/videooverview.qdoc b/doc/src/videooverview.qdoc
index ca5c7bd64..8a8347fc8 100644
--- a/doc/src/videooverview.qdoc
+++ b/doc/src/videooverview.qdoc
@@ -90,6 +90,20 @@ You can use the \l QMediaRecorder class in conjunction with other
 classes to record video to disk.  Primarily this is used with
 the camera, so consult the \l {Camera Overview} for more information.
 
+\section2 Monitoring video frames
+You can use the \l QVideoProbe class to access video frames as they
+flow through different parts of a media pipeline when using other
+classes like \l QMediaPlayer, \l QMediaRecorder or \l QCamera.  After
+creating the high level media class, you can set the source of the
+video probe to that instance.  This can be useful for performing
+some video processing tasks (like barcode recognition, or object
+detection) while the video is rendered normally.  You can not affect
+the video frames using this class, and they may arrive at a slightly
+different time than they are being rendered.
+
+Here's an example of installing a video probe while recording the camera:
+    \snippet doc/src/snippets/multimedia-snippets/media.cpp Video probe
+
 \section1 Examples
 
 There are both C++ and QML examples available.