Add preview for videos

Grab 4 frames from a video and display them in the Viewer. First frame
is @00:01:00, last at length - 1 minute, and the other two are in
between: length / 4 * 2 and 3 (hardcoded).

1 files changed, 1 insertions, 0 deletions

diff --git a/viewer.h b/viewer.h
index d95fee3..1b3c969 100644
--- a/viewer.h
+++ b/viewer.h
@@ -9,6 +9,7 @@ class Viewer : public QWidget {
     public:
         Viewer(QWidget *parent = 0, Qt::WindowFlags f = 0);
         void setFile(const QString &file, bool allFiles = true);
+        void preview(const QString &file);
 
     protected:
         virtual void wheelEvent(QWheelEvent *event);