[FFmpeg-user] How to duplicate 1st line

Ulf Zibis Ulf.Zibis at gmx.de
Sat Jan 5 02:30:47 EET 2019


because of a noise in the 1st line of my video, I want to duplicate the
2nd line to the first. I tried this and got an error about invalid
horizontal crop value:
ffmpeg -i in.vob -vf

I guess, the problem is, that the input file is interlaced. So I tried
the following:
ffmpeg -i in.vob -vf
This works, but results in visible artefacts in the first 2 lines.

Because the resulting mp4 video is progressive anyway, how could I get
what I want (only 1 line should be duplicated)?


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