Thank you very much jürgen; I'll meditate your words. I was used to the output formats of TV hard disk recorders which seem to be fa more stable to process with editing software. Thank you again I'try the software you mentioned

Thanks in advance to anyone who has the patience to answer my questions
1) I recently purchased a skystar2 pci (drivers releae 4.4.1) board which is shipped with DVBviewer. It works fine enough on my double feed dual LNB (astra and hotbird). The only problem is that I use it a lot to record films ...