fix bug when no vpre= is set

svn path=/trunk/kdenlive/; revision=5574

diff --git a/renderer/kdenlive_render.cpp b/renderer/kdenlive_render.cpp
index 128d17dd2893b4b6f90ff2f1b0a98d2635809a8c..4c25a213c9020d3a5c029518b413bdd072cf6714 100644 (file)
--- a/renderer/kdenlive_render.cpp
+++ b/renderer/kdenlive_render.cpp
@@ -63,7 +63,10 @@ int main(int argc, char **argv)
         QString dest = desturl.path();
         bool dualpass = false;
         bool doerase;
-        QString vpre=args.at(args.indexOf(QRegExp("vpre=.*")));
+        QString vpre;
+               int vprepos=args.indexOf(QRegExp("vpre=.*"));
+               if (vprepos>=0)
+                       vpre=args.at(vprepos);
         QStringList vprelist=vpre.replace("vpre=","").split(",");
         if (vprelist.size()>0)
             args.replaceInStrings(QRegExp("^vpre=.*"),QString("vpre=").append(vprelist.at(0)));