FFmpeg

None of the free video recording programs I have used did deinterlace the video.
But this software does.

I am using a bat-file deinterlace all .m2t files in a folder and convert to .mkv files:

Example 1, convert from 1080i50 to 1080p50:

REM bat-file for convert all m2t 1080i files to mkv 1080p
for %%A IN (*.m2t) DO ffmpeg -i "%%A" -vf yadif=1,format=yuv420p -c:v libx264 -vb 25000k -minrate 25000k -maxrate 25000k -bufsize 25000k -aspect "1920:1080" -r 50 -c:a aac -b:a 384k "%%A.mkv"

Example 2, convert from 1080i50 to 720p50:

for %%A IN (*.m2t) DO ffmpeg -i "%%A" -vf "yadif=1, scale=1280:720" -c:v libx264 -preset medium -tune film -crf 10 -minrate 0 -maxrate 25000k -bufsize 25000k -aspect "1280:720" -r 50 -c:a copy "%%A.mkv"

[Edited by SveinM, June 09]

As title states. Its even used to transcode videos from images in space as well

Example:

https://www.reddit.com/r/space/comments/6evjn6/in_depth_flyby_of_jupiter/

Very useful for any format, even screenshot and capture TV cards

This tool is integrated into so many commercial products without getting much acknowledgement. It has a steep learning curve but with a few simple example searches it can replace nearly all video and some image manipulation paid apps.