[FFmpeg-user] Single-field deinterlace with nnedi

[Paul B Mahol]

On 4/30/22, Alexander Zhang <zhangalexy at gmail.com> wrote:
>>> I'm trying to use nnedi to deinterlace a 29.97 fps video without
>>> doubling the frame rate. I added the fields=a option which I thought was
>>> supposed to make nnedi only use one of the two fields, but the output is
>>> still 59.94 fps. Is this a bug or am I misunderstanding something?
>>>
>>
>> Filter still produces same number of frames as input in field mode.
>> Just every second frame is duplicated in output file because of fixed
>> frame
>> rate.
>
> So should I just drop every other frame with an fps filter to get half
> the field rate?

Nope, filtering is fine. It just tires to match output frame rate.