Tvheadend

Hello,
I have 919 wtv-files that I would like to add to the recorded files in tvheadend. To do that I have created a script that extracts information from the wtv-file using ffprobe. I also converted the wtv-files into ts-files (which I believe is not really needed). From the ffprobe information I create log-files that should have a format that tvheadend should be ok with. I also inserted the right dvr-configuration and channel configuration into the log file. Strange enough this works for 765 out of the 919 wtv files (a restart of tvheadend is required to reread the dvr/log directory of course). I cannot see any pattern at the missing files. I also verified that the ts-files can be played. Tvheadend does not report any error at startup.

Is there a way to figure out why tvheadend seems to ignore some of the files? Can I switch on debugging at start up to see what's going wrong? Any other ideas?

Thanks,
Bernd