Can I brighten the color on a dvd that's already authored?

[ChaunceyK]

I have a dvd-r with video burned to it already. It plays in the dvd-player & everything, but the picture is too dark. I no longer have the original vhs, so I can't simply re-capture it & adjust the brightness like I normally would. Can I rip the dvd-r & adjust the brightness? If so, what tool can I use? A couple tools I already have, but couldn't figure a way to do it with, are the following...

InterVideo WinDVD Creator
TMPGEnc DVD Author 1.6
Ulead VideoStudio 7 SE DVD

...thank you in advance, as always.

[Baldrick]

Can't you import dvds in videostudio? Or else use vob2mpg on the DVD and import the mpg in videostudio.

[ChaunceyK]

Can't you import dvds in videostudio?

If there's an option for it, I'm not seeing it...which means I could just be missing it.

[fritzi93]

You could run it through DVDRebuilder, which of course means re-encoding. Add a line of Avisynth script in the filter editor and save. For example:

Levels(0,1.3,255,0,255)
#Corrects gamma for display in a brighter environment.

Or this:

Tweak(hue=0,sat=1,bright=10,cont=1)
#Brighten: goes from (-)255.0 to (+)255.0, default 0.0

Good luck.

[EDIT] The scripts above just brighten everything up a bit. With Tweak you can also adjust the color saturation, hue, contrast. For more, look here:

http://avisynth.org/mediawiki/Tweak

[edDV]

Separate from recoding, you have playback brightness/contrast controls in software and some hardware DVD players plus of course display controls.

The reason you try to get it right before encoding is to avoid using these controls.