[MPlayer-users] Right order for filters?

[Nico]

Hi,
assuming I want to crop, denoise, rescale and deinterlace, what the most 
convenient
order of application ?

Sometimes I use

-vf crop=,pp=,hqdn3d,scale=

but I wonder
- if it is a waste of time denoising before rescaling (down),
- if  cropping before deinterlacing (for viewing very badly interlaced old
    movies on the PC monitor, not on the TV) is the right order

Thanks,
        Nico