Removing or darkening bright area

[trolltuning]

I have a little over an hour's DV footage that I shot of a couple traching dance steps. There is a bright spot on the stage in front of them that I want to either darken or cut another section of floor and blend it in. (We left a pile of white talc on the floor and the overhead lights created a bright spot which I missed as I had the monitoring screen at the wrong angle). As I have a lot of cuts to make and I probably moved the camera about 4 times I'm looking for the simplest way to get a 1/2 decent result. Should I use one of the logo removing guides or is there a simpler way? Final product will be VCD but I'm also archiving for later DVD.
Do I need to post a screen shot?

PS floor is composite- like a marlite- no tiles, floorboards or distinct pattern.

[trevlac]

You could ...

Move the brightness up with something like Tweak(bright=20), then move it back down with the opposite Tweak(bright=-20).

This should crush the brightest spots down to a lower level. There are a few filters/ways to do the same things. This might not be smooth, but worth a try.

[trolltuning]

Thanks. I actually had to use 100 and -100 before that area became less annoying. I only have a short clip here at work to play with so I don't know if I can get away with that high a value once his partner (wearing pink) enters but maybe I'll try and turn the whole thing into what the DV camera calls Sepia for a vintage look.

[SoonUDie]

It would be great if you could post a clip for us to play with :)

[rfmmars]

Try this filter, the newest one, "autolevels". Also try it with inverted video. If the camera wasn't moved, then a subtractive mask will work.

http://eodvdf.narod.ru/

richard
www.photorecall.net

[trolltuning]

@@rfmmars
Will try these two solutions. Not sure I really understand masks but I'll try and reread some threads and guides.

@@SoonUDie
OK here is a link. It may have some wierd properties as I turned this into a WMV file so I could stick it on a jukebox and bring it to work to play with in spare time. When I converted it back to AVI it had a strange framerate and diffrent colorspace. I can put a better one up this evening if it makes any difference.
http://members.atlantic.net/~andypo/go/britespot4.avi

[trolltuning]

I tried this script:
AviSource("C:\WINDOWS\Desktop\forrestbrite.avi")
vid1=LAST
#RETURN vid1

#ConverttoYUY2(last,true)
#Tweak(bright=100)
#Tweak(bright=-100)
Crop(120,364,-328,-50)
cONVERTTOrgb32()
Invert()
#Return last
OVERCLIP=LAST #y=364
oVERLAY(vid1,overclip,opacity=.5,x=120,y=364)
but it came out like this:


http://members.atlantic.net/~andypo/go/firstfix.jpg

[FuPP]

You may want to try :

HybridFuPP(M="", D_Thr=0, L_Thr=180, LP="coloryuv(gain_y=-10)")

1/ To get the right area to process :

- To show the mask, use command : show="L" (don't forget to remove it once the settings are ok)
- tweak the sensitivity with parameter : L_Thr (the less, the more sensitive)

2/ To process :

choose the good value of gain_y

Hope it will help,
FuPP

EDIT : you can even try to attenuate the transition using a second HybridFuPP line with a little bit more sensitivity, bluring the area.

ex :

1st line : HybridFuPP(M="", D_Thr=0, L_Thr=180, LP="coloryuv(gain_y=-10)")
2nd line : HybridFuPP(M="", D_Thr=0, L_Thr=185, LP="""deen("a2d",5,30,30,0,0,0.5,0)""")

EDIT 2 : sorry, I did not have seen you posted a sample. Using L_Thr=200 for the first line with gain_y=-35 and L_Thr=170 for the second line seems to give decent results. But your sample is very short, so hard to be sure. You will probably have to tweak a little bit more.

FuPP

[trolltuning]

Thanks rfmmars and FuPP.
I'm still trying to learn how these filters work in between cutting out a hundred instances of -"oops can we shoot that again?"
I'll keep playing with them until I can get it right or at least ask a semi-intelligent question.

[FuPP]

There's a doc supplied with HybridFuPP. Btw, in that case, HybridFuPP is not used in its normal purpose (compressibility gain while maintening quality). Actually, I only use a tip, redefining the processing normally used on highly lit areas in order to darken + blur these parts. Don't hesitate to ask if you need more explanations ;)

FuPP