That's a Bug in VDR. Klaus already posted a quick'n'dirty bugfix here -> http://vdr-portal.de/board/thread.php?postid=951626#post951626

2010/12/27 Tobias Grimm <listaccount@e-tobi.net>
Hi!

I have tiny question:

When recording from a HD channel (720p50), the *.rec/info -file tells me
the recording has a framerate of 25 fps. mediainfo or ffmpeg detect
50 fps. Why such a difference? And what's the framerate the frame number
in the *.rec/marks -file is based on?

Tobias




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