from vegas to dvd - colour change

jassim wrote on 1/20/2006, 9:02 PM
hey everyone,

one of those problems that slow my work again.

editing wedding that was shot in 3ccd cameras,captured to avi, edited offline online plus colour correction using external sony tv" nvidea card s-video output", rendered to mpeg2 " colour drop a bit", the videos+ jpg for dvd menu created a dvd with dvdA 3.

problem: the colours aren't the same that was shown in the external tv. colurs too intens and contrast pushed a bit

notes:

- if i don't colour correct, the colour changes are not dramatic
- very clear the change in the dvd menu which is a jpg picture
- please don't tell me to drop my colours in vegas a bit. its a work + u cant get the exact amount + i want to trust my first color editing shown in my external tv by the online editing


sorry if my english is bad :)

jazz

Comments

farss wrote on 1/21/2006, 3:12 AM
It's very possible that in the process of applying CC you've pushed your levels even further outside the legal limits. If you put that on a DVD the player will most likely clip those levels out of concern for the TV no coping.
To fix that you really need to look at your levels using scopes and create a curve using the Color Curves FX to adjust them back within legal without causing any clipping yourself. There are other ways but that ones my preferred method. Oh and apply the FX to the video bus.
If that sounds all too complicated (and you should also read Glenn Chan's tutorials on the VASST site) then apply the CC FX on the video bus using the Computer RGB to Studio RGB preset. I'd also suggest your external monitor might be in need of calibration.

Note that a typical Sony DV camera will record whites way beyond legal. Just transferring the footage to DVD without fixing the problem will cause some or a lot of clipping. An acquaintance of mine found this out the hard way with his holiday footage of Antartica.

Bob.
jassim wrote on 1/21/2006, 7:24 AM
that's what i thought...

i am doing the CC with a graphic designer who use photoshop. i did some before but not as much as him.
we bouth like how good and clear the CC in vegas. thats why we do push the colours alittelbit more. the video look more artistic than real.

now i have to learen more about scopes, and how to read them.
i find CC is very importent. its just the other stuff that i have to read and learen about " first finding it"
its okay... for the sake of getting better videos

thanx bob

jazz
riredale wrote on 1/21/2006, 12:11 PM
Just so I understand... you previewed by using a TV hooked up to the Svideo port on your video card, right?

I've never done that, but my assumption is that the very best way to see what your final output will be is to use the DV-out connection going into a camera or other converter device, then directly to a TV monitor via video or Svideo cable. I could be wrong here, but there are so many variables involved, it seems to me that only the DV route will show exactly what the final video will look like (assuming the MPEG2 encoding won't change anything, which it shouldn't.)

Incidentally, I have two DVD players here by my desk. Any DVD I play will look slightly different on them, I think because of the NTSC "setup". One appears slightly darker and contrastier than the other.
farss wrote on 1/21/2006, 2:01 PM
Well it's the DVD players responsibility to add the setup. Probably one is designed for USA NTSC and the other one for The Rest of the Worlds NTSC.
Bob.
GlennChan wrote on 1/21/2006, 8:58 PM
I have a strong suspicion that your problem is because you are using your video card's output. Don't do that. Hook up your video via your DV camcorder.
How to do so: http://www.vasst.com/resource.aspx?id=341f43a3-f228-4bd8-a67c-7d5f37e4297e

This is because the MPEG2 encoder wants to see black at 16 and not 0. It wants to see white at 235 and not 255.

Anything outside the 16-235 may be clipped on some DVD players. Anything below 16 probably won't be visible to TV audiences, on any DVD player.

The following levels tutorial has more detail:
http://www.sundancemediagroup.com/articles/glennchan/levels_in_sony_vegas_part_one.htm

To convert your artwork to a video-friendly format, add a levels adjustment layer. output start = 16, output end = 235 (the two sliders at the very very bottom of that window). If there's lots of artificial gradients, you may get some benefit from switching to 16-bit color in Photoshop (unfortunately not all of PS' tools work in 16 bit).

2- A quick fix for the video is to add a Color Corrector filter as Bob / farss suggests. Use the computer RGB to studio RGB preset.

3- Your DVD player and DV camera and video card will all probably give different video levels. That's a landmine to watch out for. If you follow the levels tutorial linked above, that should give you proper levels. If you would like to check your DVD, you'll need to do it some other way.... possibly on somebody else's system.
jassim wrote on 1/23/2006, 6:27 PM

guys

i would like to thank you. it was very helpfull informations and links. i spend the weekend learning more about levels from footage to dvd. it looks great right now.
good i don't have a girl friend right now. she will hate veags ;)

jazz