Hi guys,
It has been a while but here I am with 2 log files.
I took a quick look at the logs and searched for an event at the time a BSOD occurred.
This is the last event that occurs in the logs before a BSOD:
in log file 3-22 this is: 2012-03-22 21:31:56,326 DEBUG [ProcessExecutor] Starting C:\Program Files (x86)\Serviio\bin\\..\lib/ffmpeg.exe -i Z:\The Hunting Party\The.Hunting.Party.LIMITED.DVDRip.XviD-SAPHiRE.avi
and in log file 3-30 we have: 2012-03-30 08:26:21,450 DEBUG [ProcessExecutor] Starting C:\Program Files (x86)\Serviio\bin\\..\lib/ffmpeg.exe -i Z:\The Descent\The.Descent.DVDRip.XviD-DoNE.avi
I don't have any knowledge of the backend structure of serviio but it seems that there is a problem with ffmpeg.exe.
Since I'm not an expert I will shut up and let you guys do the further investigations

Hope this will help to solve the problem.
Greetings
*edit*: My PC just had another BSOD, second one today. I've attached the log.