[aliencreature]

When software decoding via ffmpeg yadif is selected deinterlacer within Kodi and there seems to be no way to change it.

From documentation for Advanced Settings: https://kodi.wiki/view/Advancedsettings.xml there is an option "ppffmpegdeinterlacing" supposed to be able to set a different one yet it doesn't do anything.

[mmortal03]

there is an option "ppffmpegdeinterlacing" supposed to be able to set a different one yet it doesn't do anything.

I'd also like to know if there's a way to determine if it's doing anything, and it what conditions is it applied (only when hardware acceleration is disabled?)

I found the following elsewhere of some of these pp ffmpeg settings:
 

Code:

10.135 pp
Enable the specified chain of postprocessing subfilters using libpostproc. This library should be automatically selected with a GPL build (--enable-gpl). Subfilters must be separated by ’/’ and can be disabled by prepending a ’-’. Each subfilter and some options have a short and a long name that can be used interchangeably, i.e. dr/dering are the same.
lb/linblenddeint
Linear blend deinterlacing filter that deinterlaces the given block by filtering all lines with a (1 2 1) filter.
li/linipoldeint
Linear interpolating deinterlacing filter that deinterlaces the given block by linearly interpolating every second line.
ci/cubicipoldeint
Cubic interpolating deinterlacing filter deinterlaces the given block by cubically interpolating every second line.
md/mediandeint
Median deinterlacing filter that deinterlaces the given block by applying a median filter to every second line.
fd/ffmpegdeint
FFmpeg deinterlacing filter that deinterlaces the given block by filtering every second line with a (-1 4 2 4 -1) filter.
l5/lowpass5
Vertically applied FIR lowpass deinterlacing filter that deinterlaces the given block by filtering all lines with a (-1 2 6 2 -1) filter.