Unwanted Color Shift When Using the Chroma Keyer

Poomp wrote on 2/29/2016, 11:06 AM

See here = http://i.imgur.com/We5u8Ej.jpg

Despite having a nice clean mask, my color shifts when applying the chroma keyer. The white areas in the mask are supposed to be completely unaffected. In Vegas Pro, there is a work around, changing the project's pixel format to 8-bit. Unfortunately there is no such option in Movie Studio. I've tried to counter the purple look by adjusting the color balance, but it never quite looks right, skin tones always look pretty bad. Any suggestions?

Comments

musicvid10 wrote on 2/29/2016, 11:41 AM

First, Vegas Pro's native editing space for 8-bit source is 8-bit. Imagine that.
So "changing" the pixel format to 8-bit is not a workaround; it is where you should have left it in the first place.

Movie Studio's compositing and pixel format is 8 bit throughout. So that's not it.
Posting some screenshots and MediaInfo properties mught help someone to see what's going on.
But I suspect it is Vegas' native rgb preview space, which has been noted here thousands of times by now.

Poomp wrote on 2/29/2016, 12:47 PM

Thanks for the reply.

I was unaware that the native workspace was 8-bit. I didn't actually change the pixel format, as I mentioned, that option isn't available in Movie Studio. The only reason I mentioned it was because someone on youtube was having the same problem in Vegas, and changing the pixel format seemed to fix it.

Here's a screenshot of mediainfo and my project settings.
http://imgur.com/a/X0exh

musicvid10 wrote on 2/29/2016, 2:52 PM

What you saw on Youtube is background noise. The defaults are 8-bit, and if you or the Youtuber is getting 32 bit in a new Vegas Pro project, it is because the defaults were deliberately altered and saved that way. That said, none of this appears to have anything to do with the observations you seem to be making.

Search for "preview levels" on this forum. You will find hundreds of references.

In addition, your swatch marked "Original" is 96-115-152.
And the one marked "Keyed" is 96-96-155.
So chroma keyer is doing exactly what you told it to do, by removing greens, everywhere.

Best.

Poomp wrote on 2/29/2016, 3:37 PM

"It's not mysterious." "Imagine that."

Although you have edited your post - Please drop the condescending attitude. It would help if you properly read my posts before criticizing them.

Your original post before editing:
I said, that option is not needed to change from the defaults in Vegas Prio, nor can it be changed in Movie Studio, nor does that in itself have little if anything to do with solving your preview levels observation, which "seems" to be what you are describing..

This is the Movie Studio forum. I am not using Vegas Pro. My project is not a Vegas pro file. Like I said, the only reason I even mentioned Vegas pro was because of a similar issue that someone else had. Obviously I cannot change that setting, which I mentioned in both of my previous posts. It looks like you finally understood that much after you edited.

I also provided a link to those screen shots in my previous post. Here it is again - http://imgur.com/a/X0exh

...preview levels issue you "seem" to be reporting..

The issue I "seem" to be reporting? My original screenshot clearly shows the color shift. It isn't just in the preview, it is in the render as well.

"Thanks" and "best."

musicvid10 wrote on 2/29/2016, 3:39 PM

I don't mind you quoting my first draft, which has since been edited not just once, but three times in total;

it is better presented as it reads now, and the reason for the additional chroma shift, is now identified in that revision. Hope that helps; there are better chroma key and color tutorials out there than I could offer.
Best..

Poomp wrote on 2/29/2016, 4:25 PM

In addition, your swatch marked "Original" is 96-115-152.

-->

See here http://imgur.com/1RR03FA

If I left the plugin at the defaults (top half of the image), I would expect color shifts and transparency where I didn't want it.

Green everywhere should not be removed. Green removed outside of my range, yes. The high and low thresholds were adjusted for a pretty clean mask. It is my understanding that the solid white areas should be untouched.