[FFmpeg-user] simple bob -- How?

[Mark Filipak (ffmpeg)]

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"