Avisynth: noise reduction, lot of mosquito noise?
 

hi i'm trying to encode not another teen movie in normal svcd format using 2 pass tmpgenc onto 2 cds
avg bitrate:2358
max: 2532
min: 1162

but after i encoded it i notice a lot of background movement on low motion parts of the movie and quite a lot of mosquito noise (these both become a lot more apparent when i enlarge on playback to fullscreen). Can ne1 suggest a filter combo that can help me remove these things?

my current script is:

LoadPlugin("C:\mpeg2dec.dll")
LoadPlugin("C:\dustv5.dll")
LoadPlugin("C:\convolution3d.dll")
LoadPlugin("C:\blockbuster.dll")
Mpeg2Source("e:/not another teen movie/teen.d2v")
Lanczosresize(480,350)
Faerydust()
Convolution3d (preset="movieLQ")
Blockbuster(method="noise", variance=0.3, seed=1)
Addborders(0,113,0,11

i have also tried a fluxsmooth + convo3d script, one with temporal smoother and various others and its now starting to piss me off
i'm using avisynth 2.07 with athlon xp processor (SSE2)

Hi yauman,

Use BilinearResize instead of Lanczos. Lanczos produces sharper edges, and you will see more artifacts. Try SpaceDust() and TemporalCleaner() instead of FaeryDust() and C3d. And last, get rid of 2-pass VBR. TMPEG produces FAR better results in CQ mode that 2-pass. This has been proved over and over and over :wink:

-kwag

alright ill give it a whirl and report back

this script ok now?

LoadPlugin("C:\mpeg2dec.dll")
LoadPlugin("C:\temporalcleanerold.dll")
LoadPlugin("C:\dustv5.dll")
LoadPlugin("C:\sampler.dll")
LoadPlugin("C:\blockbuster.dll")
Mpeg2Source("e:/not another teen movie/teen.d2v")
bilinearresize(480,350)
Spacedust()
TemporalCleaner()
Blockbuster(method="noise", variance=.3, seed=1)
Addborders(0,113,0,113)
sampler()

any suggestions for improvement?

Your resize needs to be a multiple of 8 if you are using dustv5.dll as one of your filters...

If I am going for a 1/2 DVD resolution I would use

bilinearresize(352,480)

or for a 3/4 DVD resolution

bilinearresize(528,480)

so if your movie is going for a 480x480 resouution
you should use:
bilinearresize(480,352)
Spacedust()
TemporalCleaner()
Blockbuster(method="noise", variance=.3, seed=1)
AddBorders(0,64,0,64)

well after encoding the right sized sample of that script i notice that the movie was very smooth,too smooth and some mosquitos were still present, ne alternatives to those filters or should i remove one?

yauman

Which KVCD template are you using? and What is your latest script?

LoadPlugin("C:\mpeg2dec.dll")
LoadPlugin("C:\temporalcleanerold.dll")
LoadPlugin("C:\dustv5.dll")
LoadPlugin("C:\sampler.dll")
LoadPlugin("C:\blockbuster.dll")
Mpeg2Source("e:/not another teen movie/teen.d2v")
bilinearresize(480,352)
Faerydust()
TemporalCleaner()
Blockbuster(method="noise", variance=.3, seed=1)
Addborders(0,112,0,112)
sampler()

and im doing the encode in normal compliant svcd format, ie default gop and default matrix in tmpgenc, this is for my standalone dvd player and id prefer it in mpeg2 (i really dont want it in a different format)

using that script the movie is quite a bit softer (less than when i used spacedust tho) but there is still a lot of mosquitos and now i can see dct blocks

If you are using default svcd then your movie is going to take 3CD's if you want good quality...

I don't know if your player supports it, but you should be able to fit the whole movie on 1CD using KVCDX3 MPEG-1 and it will look almost like the original DVD