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Why does the mpeg2 encoder increase contrast?
When you output to mpeg2 for DVD, why does the encoder in Vegas increase the contrast by about 15%? What can be done to fix it?
To show you what I’m talking about…
Here’s a frame pulled from the source .mov file that I used:
https://icorptv.com/assets/images/Source-Frame.jpgHere’s a frame from the DVD output from Vegas where no filters or color correction whatsoever was applied to the video track:
https://icorptv.com/assets/images/Vegas-frame.BMPNow a frame from the DVD output from Vegas where I reduced the contrast by 15%:
https://icorptv.com/assets/images/Vegas-Minus15-Contrast.BMPJust for comparison, here’s a frame from the DVD output from Premiere where no filters or color correction was applied and I used the same source .mov file:
https://www.lunchmoney.tv/icorptv/assets/images/Premiere-frame.BMPYou can see when the contrast is reduced by 15% the encode comes out looking like the original. You can also see Premiere outputs properly. It only happens when outputting to mpeg2 for DVD. The other encoders, Windows Media, Real, Quicktime, etc. don’t do this.
It’s a relatively easy fix to reduce the contrast of each video track by 15% to get a proper output but it’s really irritating having to do it.
I’ve done many DVD outputs now and this has happened on all of them, it wasn’t just this one time occurrence.
I have Vegas Movie Studio Platinum 7.0 and I thought this cheaper version might just have a cheaper encoder but that’s not the case as the encoder in Movie Studio Platinum is the exact same one as in Vegas 7.
Is there a way to fix this?
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2 Replies
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it’s not. You’re looking at playback from two different RGB setups. One is computer RGB, the other is Studio RGB (Sony terminology).
One is 0-255, the other is 16-235.Douglas Spotted Eagle
VASST
Aerial Camera/Instructor
Certified Sony Vegas Trainer -
Sorry, I’m not sure exactly what you mean – I have a guess of what you’re talking about but I’m not sure.
I’m actually looking at playback of the DVD outputs within the same one set up. I compared all of the DVD outputs: (1) from Vegas with no adjustments to contrast, (2) from Vegas with minus -15% contrast, (3) from Premiere with no adjustments to contrast – on the same computer/monitor in the same player programs and I tried several just to make sure; PowerDVD, Real Player, Nero Showtime and Windows Media Player – and they all showed the same results upon direct comparison, that the DVD output from Vegas had an increased amount of contrast.
I also tried playing the DVD in a DVD player on the TV – still same increased contrast.
I grabbed all of those frames that I posted from within the program PowerDVD – not within Vegas. (with the exception of the source .mov file which I exported from quicktime)
The increased contrast is definitely hard coded in the file output. It’s not a result watching the DVD in different RGB setups.
Is that what you were referring to?
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