[MEncoder-users] Correct order for denoise filter

[Oleynik Phil]

Jean Hoderd wrote:

>Hi,
>
>I was wondering what is the correct order for placing a denoise
>filter such as hqdn3d: should it be before or after scaling?
>
>This:
>
>    -vf crop=680:552:22:12,scale=512:384,hqdn3d
>
>Versus this:
>
>    -vf crop=680:552:22:12,hqdn3d,scale=512:384
>
>Also, I was looking for a more detailed explanation
>of the meaning of hqdn3d parameters.  MPlayer's manual
>is terse at best...  Can someone point me to a reference?
>(My googling came back empty-handed)
>
>Thanks in advance for your time!
>Cheers,
>Jean
>
>  
>
If you are shrinking movie down - then after. If you enlarge it - then 
put it before.
Parameters are not clearly defined, try and see method is the best here.

Philipp