On Sat, Sep 13, 2003 at 01:31:32PM +0200, Nico wrote:
[Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html] 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=
Which pp options are you using? Deinterlace can go after crop (as long as crop offset is a multiple of two, which it should ALWAYS be anyway), but any other postprocessing (deblock, dering, etc.) MUST be performed before other filters. Otherwise the necessary info from the codec is lost.
but I wonder - if it is a waste of time denoising before rescaling (down),
Maybe. I've had ok success using denoise3d after downscaling, but that was mainly for making low quality, low-res encodes for sending to friends who really didn't care about quality. You'd have to do some extensive testing to see how quality compares when making good encodes.
- if cropping before deinterlacing (for viewing very badly interlaced old movies on the PC monitor, not on the TV) is the right order
Should be ok. Rich