[FFmpeg-user] simple bob -- How?

[Paul B Mahol]

On Tue, Dec 29, 2020 at 10:32 AM Mark Filipak (ffmpeg) <markfilipak at bog.us>
wrote:

> On 12/29/2020 04:09 AM, Mark Filipak (ffmpeg) wrote:
> > On 12/29/2020 04:04 AM, Paul B Mahol wrote:
> >> On Tue, Dec 29, 2020 at 9:56 AM Mark Filipak (ffmpeg) <
> markfilipak at bog.us>
> >> wrote:
> >>
> >>> On 12/29/2020 03:41 AM, Paul B Mahol wrote:
> >>>> On Tue, Dec 29, 2020 at 5:51 AM Mark Filipak (ffmpeg) <
> >>> markfilipak at bog.us>
> >>>> wrote:
> >>>>
> >>>>> I seek a way to do simple bob (i.e. repeat fields at 2xFPS) with no
> >>> other
> >>>>> filtering. Can you help me?
> -snip-
> >>>> After so much time you still struggle a lot, buy some GUI tools and be
> >>>> happy ever after.
>
> Here's what I've tried so far:
> -filter_complex
> "split[a][b],[a]separatefields[c],[b]separatefields[d],[c][d]join"
> -filter_complex
> "split[a][b],[a]separatefields[c],[b]separatefields[d],[c][d]interleave"
> -vf "separatefields,shuffleframes=0 0,weave"
> -vf separatefields,scale=720x480
> -vf separatefields,scale=w=iw:h=2*ih
> -filter_complex "split[a][b],[a]separatefields[c],[c][b]scale2ref"
>

Do you want interlacer or deinterlacer? It is very unclear from your
subject what you need.

Simple bob deinterlacer takes every single field and than interpolates
missing fields with bilinear interpolation iirc.

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