[BUG] Enforce ffmpeg is enabled for dvd input! -> create debug output and contact author!

[Selur]

Okay,
you selected 'Median Deinterlacer' as deinterlacer, which is a deinterlacer from FFmpeg, but mencoder is needed for DVD input.
Also iirc, NVEncC as encoder also needs y4m input which mencoder does not support. (I'm not totally sure about this.)
FFmpeg does not support DVD input.
In newer versions, Hybrid would create a command call which combines 3 calls mencoder -> ffmpeg -> encoder, but the old version doesn't support this.

If I'm wrong and NVEncC does not require FFmpeg as decoder in Hybrid, then you could
a. if you only need the first title of the DVD you could enable that Avisynth can also be used for DVD input (under Config->Internals->Avisynth->...) and use an Avisynth based deinterlacer.
b. you could use a deinterlacer that is supported in mencoder (i.e. Yadif)

If I remember correctly, you can't combine DVD input with NVencC in that version with mencoder as decoder, so either enabling Avisynth DVD processing or switching to a new OS and a newer Hybrid would be needed.

Cu Selur