A really messy clip, can't figure out how to clean it

Hareoic · Post by **Hareoic** » Sat Apr 19, 2008 3:00 pm

I don't know what happened with this particular clip (says it was a LameVBR encoding and something about wmv9 in the filename, don't know if it's even relevant) but I cannot figure out any filters or combination of filters that work on it.

This is what I've tried so far:

BiFrost(interlaced=false)
VagueDenoiser(threshold=3)
DeHalo_Alpha()
ChromaShift()
UnDot
Deen("w3d",2,2,4)
DeBlock(quant=51)
vmToon(strength=24, xstren=128)

And even after all that, individually or together, the quality doesn't seem to improve. Can somebody help me out?

Kariudo · Post by **Kariudo** » Sat Apr 19, 2008 3:12 pm

some frames will just be bad no matter what you do (though that tends to happen more around scene changes in my experience)

if you don't have Tcomb, get it from here

Tcomb needs interlaced footage IIRC, so if you are deinterlacing/IVTC-ing put this before you do that.
tcomb's documentation is pretty good. Read through it and you should be able to take care of that dot crawl and rainbowing

I'd also suggest using fluxsmoothST() to get rid of the noise along the lines (like pink-hair's neck and chin)

Mosc · Post by **Mosc** » Sat Apr 19, 2008 3:45 pm

The dot crawl is nasty, but just dfttest() cleaned up the majority of the image decently. DeHalo_alpha() is useful too, but only if you're willing to sacrifice some sharpness.

Of course, if you really wanted help, you'd offer a small clip for us to play with. Temporal filtering can be a very powerful tool but can inherently not be tested on a single picture.

Hareoic · Post by **Hareoic** » Sat Apr 19, 2008 3:55 pm

I would if I knew where I could host it.

LivingFlame · Post by **LivingFlame** » Sat Apr 19, 2008 3:57 pm

Just stick it on Megaupload and post the link here. You can put up to 500MB on there (though that's entirely unnecessary for this, lol).

Hareoic · Post by **Hareoic** » Sat Apr 19, 2008 4:03 pm

Would compressing it be a good idea?

Hareoic · Post by **Hareoic** » Sat Apr 19, 2008 4:12 pm

Well here it is anyway, uncompressed because I heard somewhere that compressing clips is bad:

http://www.megaupload.com/?d=1IAC7NZ7

Kariudo · Post by **Kariudo** » Sat Apr 19, 2008 4:26 pm

compressing in itself isn't bad. Lossless codecs (like huffyuv and lagarith) retain all the quality

Hareoic · Post by **Hareoic** » Sat Apr 19, 2008 4:43 pm

Kariudo wrote:compressing in itself isn't bad. Lossless codecs (like huffyuv and lagarith) retain all the quality

Well that's what I used, then.

Hareoic · Post by **Hareoic** » Sat Apr 19, 2008 5:52 pm

One thing that I should mention: I used UnDot, for invisible noise, and not DeDot, for dot crawl. I didn't see any dot crawl in the footage in the first place.