volleyball footage interlacing problem... 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 January 21st, 2008, 07:11 AM   #1
Major Player
 
Join Date: Oct 2005
Location: Fort Myers, FL
Posts: 263
volleyball footage interlacing problem...

Hi all. Did an 8mm analog tape capture of volleyball footage and am creating a highlight dvd for a client to send to interested colleges (Rutgers, for one). The process went smoothly (the uncompressed avi caps look fine), but when I rendered the project to mpg I get what looks like interlacing in any of the shots with camera panning or zooming. Even the rendered avi of the project had the problem. I had just updated to Vegas Pro 8.0b and DVDA 4.5b, had my render settings at Best, Gaussian blur, blend fields, lower field first, and .9091 pixel aspect ratio. I've never had this problem before, so I reinstalled version 8.0a and 4.5a, respectively, with no results. The only difference I can see with this project from most of the others I've done is the camera the client shot with, a Sony Hi8 Handycam TRV68, and he had a lot of fast camera movement. But I've captured plenty of analog footage before, even crappy vhs stuff, and never seen this.
Any help would be appreciated. Here are two examples, a rendered mpg and avi clip. The avi is 47 mb. Thanks.
http://firsttakestudios.com/demos/atlanta2007clip1.mpg
http://firsttakestudios.com/demos/atlanta2007clip1.avi
__________________
Vin
First Take Studios
Vincent Croce is offline   Reply With Quote
Old January 21st, 2008, 08:34 AM   #2
Major Player
 
Join Date: Oct 2005
Location: Fort Myers, FL
Posts: 263
figured it out...

I just found out that by my slightly zooming in with the track's pan/crop properties (to get rid of slight off tracking noise along the edge of the captures) I had caused the interlacing problems. I didn't know this and have done it before on other transfers I have done to get rid of tape compression noise along the edges, without noticing a problem. I guess the faster cam movement from this footage made the problem with this technique more obvious. I solved the edge noise problem by a slight black masking of the borders...
Glad I got a handle on this, it's due tomorrow...
__________________
Vin
First Take Studios
Vincent Croce is offline   Reply With Quote
Old January 21st, 2008, 08:57 AM   #3
Inner Circle
 
Join Date: May 2005
Location: Windsor, ON Canada
Posts: 2,765
Vin, odds are pretty good that, when you zoomed in, you ended up on the wrong video line (odd vs. even or the other way around), thus changing it from lower field to upper field.
The only solution would be to zoom in or out further by one line.
Mike Kujbida is offline   Reply With Quote
Old January 21st, 2008, 10:02 AM   #4
Major Player
 
Join Date: Oct 2005
Location: Fort Myers, FL
Posts: 263
Thanks Mike. Ed Troxel mentioned the same thing and I'll have to test that out. Man, it makes me realize how much I have to learn about basics in editing...
__________________
Vin
First Take Studios
Vincent Croce is offline   Reply With Quote
Old January 21st, 2008, 10:36 AM   #5
Regular Crew
 
Join Date: Oct 2003
Location: Hooper, UT
Posts: 177
Vince,
Try rendering with the progressive mode on (instead of lower field). I've been able to get rid of interlace artifact problems by doing that in the past. Hope it helps.
Randy
Randy Stewart is offline   Reply With Quote
Old January 21st, 2008, 07:04 PM   #6
Major Player
 
Join Date: Oct 2002
Location: Albuquerque, New Mexico USA
Posts: 326
Keep in mind that rendering progressive will reduce your temporal (time) resolution in half. Instead of 59.94 individual images per second, you will only have 29.97 and it will tend to have a "stuttering" effect on fast motion.
John Cline is offline   Reply With Quote
Old January 21st, 2008, 09:19 PM   #7
Major Player
 
Join Date: Oct 2005
Location: Fort Myers, FL
Posts: 263
I'm not going to render interlaced sports footage as progressive, there is too much fast motion, and I've finished the project interlaced and used the rectangular mask and it came out very nice. Thanks for all the great input!
__________________
Vin
First Take Studios
Vincent Croce 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 03:00 AM.


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