The following could be the reasons RealPlayer is shutting down.
- Corrupted video
- Incompatible video format
- Bad installation of RealPlayer
Can you reinstalling RealPlayer to make sure the installation is correct.
If it is a corrupted video, please try a different video. If it is an incompatible video format, please use RealConverter to convert the video to a different video format and burn the converted video.
Hopefully this helps.