[MPlayer-users] Need help with deblocking (-vf pp)

[John Brown]

Thanks for your suggestions.

>*cmp=2 options tend to make things blocky in my experience.  You can try
>*cmp=3 or just leave them all out and try the default.

I did not see a difference between no cmp and cmp = 3, but both were better 
than cmp = 2. I know that the results depend on what you are encoding, but 
if in your experience cmp=2 leads to blockiness, why does the MPlayer manual 
suggest it for a high-quality encode? For what it's worth, the blockiness 
shows in two main areas in the opening song:

1) Some transitions  where one scene blends into the next (blocky 
background)
2 ) A fight against a background of dark clouds (blocky clouds).


>You generally shouldn't encode with postprocessing.
I don't think I can assume that the DVD player has block removal like 
MPlayer.

>For deblocking, try
>options like scplx_mask=0.2.  Also, denoising (nr/hqdn3d) may help (or
>it may make things worse).

scplx_mask seemed to help, hqdn3d didn't, didn't try nr.

I will stick with 352x240 since I am satisfied with it. Creating DVDs is 
neither my profession nor my hobby, and there are too many switches and 
legal values for them for someone who has no knowledge of the theory of 
video compression (luma? chroma? quantizer?) to find a solution by 
searching.

Too bad that -vf pp did not seem to have a visible effect.