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, 3 insertions, 0 deletions

diff --git a/helper.h b/helper.h
index 90bef11..3587183 100644
--- a/helper.h
+++ b/helper.h
@@ -3,10 +3,13 @@
 
 #include <QString>
 #include <QJsonDocument>
+#include <QPixmap>
 
 namespace Helper {
     const QString md5Sum(const QString &path);
     const QJsonDocument ffpmegData(const QString &path);
+    const QPixmap preview(const QString &file);
+    const QImage snapshot(const QString &file, int offset);
     class Duration {
         public:
             Duration();