Compression in DVDA at DVinfo.net

Go Back   DV Info Net > Windows / PC Post Production Solutions > What Happens in Vegas...

What Happens in Vegas...
...stays in Vegas! This PC-based editing app is a safe bet with these tips.


Reply
 
Thread Tools Search this Thread
Old July 20th, 2009, 03:03 PM   #1
Regular Crew
 
Join Date: Jul 2009
Location: OC and LA
Posts: 56
Compression in DVDA

Hey guys,

I shot some footage (SD) with a 100B. 16x9 24P I rendered from Sony Vegas Pro via JETDV's DVDA settiings. I've noticed some really bad compression artifacts in DVDA with RED colors. Is this just the compression I have to live with? I have not noticed this before on other projects. I've been using Sony Vegas since Version 3.

Here is what I did:

1. Edit in Sony Vegas Pro- 16x9, 24P
2. Curves, and Color Correction
3. Rendered to DVDA via MPEG2 JETDV"S settings- Using 24P Widescreen
4. The project is 2 DVD's both at about 50 min in length- Fit to disc.-
5. It does not re-render the MPEG2 in DVDA- Its fairly quick to prepare and burn

Settings
8,000,000
6,000,000
2,000,000

VBR 2 Pass

Any comments on what I might try to resolve this RED issue. (not to be confused with RED camera, just RED colors....)

Thomas
__________________
Canon DSLR's, C100, C300. FCPX, Sony Vegas Pro. Assorted Nikon, Canon, Zeiss lens.
Thomas Roberts is offline   Reply With Quote
Old July 20th, 2009, 03:13 PM   #2
Inner Circle
 
Join Date: Nov 2006
Location: Tallahassee, FL
Posts: 4,100
Just a few things:

1. WHen you did your curves and color corrections, did the red stay legal?

2. Given the very short run times of your disks, I would not use VBR. I'd use CBR with 8Mbps. Why worry about heavy compression if it's simply not needed?

3. If you render this out to an uncompressed file, or lightly compressed file, do you see the same artifacting in reds?

4. If you render the file without doing any color correction at all, do you still see the issue in the reds?

Just trying to sort out if the issue is with the compression, the levels changes your making in the file, or something else.

-P



Quote:
Originally Posted by Thomas Roberts View Post
Hey guys,

I shot some footage (SD) with a 100B. 16x9 24P I rendered from Sony Vegas Pro via JETDV's DVDA settiings. I've noticed some really bad compression artifacts in DVDA with RED colors. Is this just the compression I have to live with? I have not noticed this before on other projects. I've been using Sony Vegas since Version 3.

Here is what I did:

1. Edit in Sony Vegas Pro- 16x9, 24P
2. Curves, and Color Correction
3. Rendered to DVDA via MPEG2 JETDV"S settings- Using 24P Widescreen
4. The project is 2 DVD's both at about 50 min in length- Fit to disc.-
5. It does not re-render the MPEG2 in DVDA- Its fairly quick to prepare and burn

Settings
8,000,000
6,000,000
2,000,000

VBR 2 Pass

Any comments on what I might try to resolve this RED issue. (not to be confused with RED camera, just RED colors....)

Thomas
__________________
DVX100, PMW-EX1, Canon 550D, FigRig, Dell Octocore, Avid MC4/5, MB Looks, RedCineX, Matrox MX02 mini, GTech RAID, Edirol R-4, Senn. G2 Evo, Countryman, Moles and Lowels.
Perrone Ford is offline   Reply With Quote
Old July 20th, 2009, 05:07 PM   #3
Inner Circle
 
Join Date: May 2005
Location: Windsor, ON Canada
Posts: 2,765
I agree with Perrone about encoder settings.
I use his numbers for anything that's 75 min. or less.
Only after that do I get into custom VBR settings.

Red has always been a difficult colour for video, especially if it's outside of the legal limits, so do check your values and make sure.
Mike Kujbida is offline   Reply With Quote
Old July 20th, 2009, 06:11 PM   #4
Regular Crew
 
Join Date: Jul 2009
Location: OC and LA
Posts: 56
Ahhhh interesting point with the RED safety Settings. I used a Conservative - 7.5 Setup on the Broadcast Colors as a final to help with the levels....I was told this would be helpful for Broadcast and DVD issues....

1. I will re-render based on your settings
2. Will the RED color issue arise again with HVx200 footage?

Thanks,

Thomas
__________________
Canon DSLR's, C100, C300. FCPX, Sony Vegas Pro. Assorted Nikon, Canon, Zeiss lens.
Thomas Roberts is offline   Reply With Quote
Old July 20th, 2009, 06:13 PM   #5
Regular Crew
 
Join Date: Jul 2009
Location: OC and LA
Posts: 56
Perrone Ford,

1. No issues when rendering to uncompressed
2. No issues when I remove curves and color correction.....but images NEED both for client review

Thomas
__________________
Canon DSLR's, C100, C300. FCPX, Sony Vegas Pro. Assorted Nikon, Canon, Zeiss lens.
Thomas Roberts is offline   Reply
Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

Professional Video
(800) 833-4801
Portland, OR

B&H Photo Video
(866) 521-7381
New York, NY

Z.G.C.
(973) 335-4460
Mountain Lakes, NJ

Abel Cine Tech
(888) 700-4416
N.Y. NY & L.A. CA

Precision Camera
(800) 677-1023
Austin, TX

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > Windows / PC Post Production Solutions > What Happens in Vegas...

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 03:19 AM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2017 The Digital Video Information Network