[FFmpeg-user] How to deinterlace strange interlacing

Paul B Mahol onemda at gmail.com
Wed Mar 31 20:44:24 EEST 2021

On Wed, Mar 31, 2021 at 7:40 PM Ulf Zibis <Ulf.Zibis at cosoco.de> wrote:

> Hi,
> here is the original: http://www.jugkoeln.de/Videos/Mak/Mak.mpg
> transcoded to mp4: http://www.jugkoeln.de/Videos/Mak/Mak.mp4
> On the clapping hands, you see typical interlacing patterns.
> deinterlaced with bwdif: http://www.jugkoeln.de/Videos/Mak/Mak_bwdif.mp4
> ... with bwdif=1:0: http://www.jugkoeln.de/Videos/Mak/Mak_bwdif_1_0.mp4
> ... with bwdif=1:1: http://www.jugkoeln.de/Videos/Mak/Mak_bwdif_1_1.mp4
> All 3 attempts result in insufficient deinterlacing.
> Does one have an idea, how to deinterlace better?

Your input file is simply invalid, it is processed already, probably
resized while being interlaced in invalid way.
There is no way to fix it reliably. Nothing to do with bwdif filter.

See output with separatefields filter for proof.

> Thanks
> -Ulf
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