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yadif
The best description I've seen of the filter options is here: https://www.avidemux.org/admWiki/doku.php?id=using:video_filter_yadif
I use yadif
on DVDs that have interlacing, but are not telecined.
Command line for its default options:
ffmpeg ... -vf yadif=mode=send_frame:parity=auto:deint=all ...