Problem with frame rate of RAW 1:1 mkv

[Selur]

my quest is: it's the right way to have the correct fps of the original RAW 1:1 mkv?

Normally, Hybrid should see that the mkv was created with MakeMKV and that the source was a DVD.
Then it should either assume 29.97fps telecined / interlaced or (soft) telecined as input, depending on the other flags that were set by MakeMKV.
Hybrid then would, assuming the output isn't configured to be interlaced, deinterlace, apply IVTC (or a soft-pulldown if DGDecNV is supported and the source should be '(soft) telecing').
That would be the correct way to handle this.

If for some strange reason your DVD wasn't DVD compliant or MakeMKV changed its signaling of content, you should overwrite the input frame rate ('Filtering->Misc->Overwrite Input->Overwrite input frame rate'), not the output frame rate. By overwriting the input frame rate Hybrid can take that frame rate into account if other filters are used.

It would help, if you could provide a debug output (read the sticky on how to), so I can see what is happening (what flags are set to what values according to MediaInfo&co).

Cu Selur