Hello Olga,
here is the link to download illustration files http://www.uschovna.cz/zasilka/EP629BGBMSFYZLXB-TSE/.
It contains the source AVI, project and two result files.
The POK2_001.wav file was created by the Batch Manager and it is OK.
The POK2.wav file was created by the SMM_BatchSplit .exe. It can be played as well but other software can't recognise it. The reason is "RIFF .. AVI LIST" in the header, I think.
The Video Splitter version is 5.0.1503.17
Thank you.