How to fix kdenlive crashes on Ubuntu 13.10 during scene finding

I am new to the video editing software kdenlive and tried to use it to edit a large avi file. I added the avi clip and started a job to find the scenes in this avi. Halfway through the clip (after 30 minutes or so), kdenlive` suddenly crashed. How can I fix this problem? Additional information related to my questions will be given below once they are asked. As I have no idea whether the issue is related to Ubuntu, the desktop, kdenlive or the avi file, I cannot be more specific at this point. **Additional information** - Sometimes the program outputs the following: Unable to start Dr. Konqi But there seems to exist no package which might solve this problem.