JPEG shimmer after render to DVDA at DVinfo.net

Brian Luce · April 29th, 2010, 04:07 AM

I have some 7d stills in a video in Vegas 9c. Render to mpeg2 and burn to SD DVD in DVDA and certain jpegs shimmer. For example, a chrome stove is shimmering wildly, so is a spanish tile roof. Other shots not at all. Seems to be fine detail? All are panned and cropped. Tried it with "reduce interlace flicker" checked and unchecked, still shimmers. Properties set to progressive.

Is there a fix?

Mike Kujbida · April 29th, 2010, 04:17 AM

How large (in pixels) are the images?
My experience has been that the shimmer happens if the images are too large.
Unless I'm doing really deep zooms, I make sure that they are no more than twice my project size which, for SD NTSC, would be 1440 x 960.

edit: if it's possible, put up one of the images for us to play with.

Brian Luce · April 29th, 2010, 05:26 AM

I was wondering about that too, the rescaling. 3456x2304

Edward Troxel · April 29th, 2010, 06:22 AM

When you have fine lines in an image, that will happen as the image is interlaced. The fine line going across the interlace lines create the shimmering effect. For example, a brick wall will almost always give the shimmer once interlaced. Turn on "Reduce Interlace Flicker" to help with that. If it still happens, adding a slight blur might also help.

Mike Kujbida · April 29th, 2010, 07:05 AM

Definitely scale it down as that will help by throwing out some of the fine detail.
A small amount of Gaussian Blur can help too.
Adjust Horizontal to 0.0 and Vertical at 0.001 to 0.003

Paul Cascio · April 29th, 2010, 07:16 AM

Try converting to PNG also.

Brian Luce · April 29th, 2010, 09:52 AM

What would be a good resolution to scale to? I've already tried right click>check reduce interlace flicker. It might of helped a tiny bit.

Edward Troxel · April 29th, 2010, 11:18 AM

Generally speaking, double the video resolution is a good starting point. This will still give you room to zoom in but will be much smaller than the original images.

Terry Esslinger · April 29th, 2010, 03:40 PM

If you are scanning your images originally is it a good idea to scan at the twice project resolution (1440 x 760) and save as .png. My scanner also gives an option to save as interlaced or not? Which is better?

Sam Houchins II · April 29th, 2010, 06:18 PM

I've had this problem several times in the past, and with all the trial and errors, i think i got a sprinkling of supersampling and motion blur via the video bus trak to solve my shimmering. It was awhile ago, but i think that was the last thing i tried to an aceptable result. It dramatically increases render times, so use the envelope to surgically apply it only where needed. I think the motion blur was only a relatively small amount too. It's been awhile, so i hope i'm not steering you wrong.

Brian Luce · April 29th, 2010, 06:41 PM

Quote:

Originally Posted by Sam Houchins II

I've had this problem several times in the past, and with all the trial and errors, i think i got a sprinkling of supersampling and motion blur via the video bus trak to solve my shimmering.

Thanks, what's the procedure for that?

Sam Houchins II · April 29th, 2010, 07:26 PM

ctrl-shift-b reveals the video bus track
or
File-Edit-View-Insert-Tools-Options-Help; then check the video bus track option.
It will appear as the bottom track
Right clicking on empty space on the Video Bus Track or its header will reveal some options, including access to the insert/remove envelope drop down menu, where motion blur and supersampling will be available.

April 29th, 2010, 04:07 AM	#1
Brian Luce Inner Circle Join Date: Jan 2006 Posts: 2,290	JPEG shimmer after render to DVDA I have some 7d stills in a video in Vegas 9c. Render to mpeg2 and burn to SD DVD in DVDA and certain jpegs shimmer. For example, a chrome stove is shimmering wildly, so is a spanish tile roof. Other shots not at all. Seems to be fine detail? All are panned and cropped. Tried it with "reduce interlace flicker" checked and unchecked, still shimmers. Properties set to progressive. Is there a fix?

April 29th, 2010, 06:22 AM	#4
Edward Troxel Sponsor: JET DV Join Date: Dec 2001 Location: Southern Illinois Posts: 7,953	When you have fine lines in an image, that will happen as the image is interlaced. The fine line going across the interlace lines create the shimmering effect. For example, a brick wall will almost always give the shimmer once interlaced. Turn on "Reduce Interlace Flicker" to help with that. If it still happens, adding a slight blur might also help. __________________ Edward Troxel [SCVU] JETDV Scripts/Scripting Tutorials/Excalibur/Montage Magic/Newsletters

April 29th, 2010, 07:16 AM	#6
Paul Cascio Trustee Join Date: Sep 2004 Location: Bristol, CT (Home of EPSN) Posts: 1,192	Try converting to PNG also. __________________ Paul Cascio www.pictureframingschool.com

April 29th, 2010, 11:18 AM	#8
Edward Troxel Sponsor: JET DV Join Date: Dec 2001 Location: Southern Illinois Posts: 7,953	Generally speaking, double the video resolution is a good starting point. This will still give you room to zoom in but will be much smaller than the original images. __________________ Edward Troxel [SCVU] JETDV Scripts/Scripting Tutorials/Excalibur/Montage Magic/Newsletters

April 29th, 2010, 03:40 PM	#9
Terry Esslinger Major Player Join Date: Oct 2002 Location: Sacramento, Elk Grove. Calif Posts: 306	If you are scanning your images originally is it a good idea to scan at the twice project resolution (1440 x 760) and save as .png. My scanner also gives an option to save as interlaced or not? Which is better? __________________ Puttin the wet stuff on the red stuff!

April 29th, 2010, 04:17 AM	#2
Mike Kujbida Inner Circle Join Date: May 2005 Location: Windsor, ON Canada Posts: 2,770	How large (in pixels) are the images? My experience has been that the shimmer happens if the images are too large. Unless I'm doing really deep zooms, I make sure that they are no more than twice my project size which, for SD NTSC, would be 1440 x 960. edit: if it's possible, put up one of the images for us to play with.

April 29th, 2010, 05:26 AM	#3
Brian Luce Inner Circle Join Date: Jan 2006 Posts: 2,290	I was wondering about that too, the rescaling. 3456x2304

April 29th, 2010, 07:05 AM	#5
Mike Kujbida Inner Circle Join Date: May 2005 Location: Windsor, ON Canada Posts: 2,770	Definitely scale it down as that will help by throwing out some of the fine detail. A small amount of Gaussian Blur can help too. Adjust Horizontal to 0.0 and Vertical at 0.001 to 0.003

April 29th, 2010, 09:52 AM	#7
Brian Luce Inner Circle Join Date: Jan 2006 Posts: 2,290	What would be a good resolution to scale to? I've already tried right click>check reduce interlace flicker. It might of helped a tiny bit.

April 29th, 2010, 06:18 PM	#10
Sam Houchins II Major Player Join Date: Jun 2003 Location: Fredericksburg, VA Posts: 282	I've had this problem several times in the past, and with all the trial and errors, i think i got a sprinkling of supersampling and motion blur via the video bus trak to solve my shimmering. It was awhile ago, but i think that was the last thing i tried to an aceptable result. It dramatically increases render times, so use the envelope to surgically apply it only where needed. I think the motion blur was only a relatively small amount too. It's been awhile, so i hope i'm not steering you wrong.

April 29th, 2010, 07:26 PM	#12
Sam Houchins II Major Player Join Date: Jun 2003 Location: Fredericksburg, VA Posts: 282	ctrl-shift-b reveals the video bus track or File-Edit-View-Insert-Tools-Options-Help; then check the video bus track option. It will appear as the bottom track Right clicking on empty space on the Video Bus Track or its header will reveal some options, including access to the insert/remove envelope drop down menu, where motion blur and supersampling will be available.