Re-encoding 1080i

[dw-wizard]

I have a TV tuner card, some videos capture as 720, 60 fps (I have no problems with these) others are 1080i, 30 fps. I am trying to determine the best way to re-encode the 1080i videos from their captured format of 1080i MPEG TS to a lower bit rate with x264. Many of these recordings are movies which I know are 24 fps.

I have figured out how to deal with the 720p 60 fps videos, but I am struggling with the best way to deal with de-interlacing (or otherwise properly re-encoding) the 1080i videos.

Currently I have found these AVISynth functions that help with dealing with the 1080i:
TDecimate # Decimate 30 fps to 24
Bob # deinterlace 24 fps to 48 fps

This looks good, but it is still 2x the original frame rate. I feel like I am close. I'm hoping that someone here has dealt with this before and knows of the best solution.

Any advice? AVISynth Examples?

[manono]

Currently I have found these AVISynth functions that help with dealing with the 1080i:
TDecimate # Decimate 30 fps to 24

I hope you mean TFM.TDecimate. Using TDecimate by itself is worse than doing nothing at all.

Currently I have found these AVISynth functions that help with dealing with the 1080i:
.
Bob # deinterlace 24 fps to 48 fps

I hope you don't mean literally using the Bob filter, as it is probably the worst of the AviSynth bobbers. You have two choices when presented with true interlaced 29.97fps video (if you can't or won't keep it interlaced). One is to use a single-rate deinterlacer and the other is to bob it with a double-rate deinterlacer. You decide for yourself which looks better. Both have their pluses and minuses.