Below is an example of using command line ffmpeg on Ubuntu for compressing interlaced video:
ffmpeg -ss 0 -i inputvideo.wtv -vf yadif -sn -vcodec libx264 -crf 25 -acodec libmp3lame -aq 6 outputvideo.mkv
Note that the -ss means start at that second, so -ss 10 would mean start at 10 seconds into the video
-vf yadif is what does the deinterlacing |