Comments

John_Cline wrote on 12/26/2008, 9:40 AM
If you're playing a properly authored DVD on a standard CRT-based television, you really shouldn't be seeing any "interlace jaggies." What is your source material?
overyonder wrote on 12/26/2008, 10:12 AM
Source is interlaced standard def mini dv from single-chip canon camera. Widescreen setting in camera (squeezed) to interlaced widescreen DVDA compatible render.

I watched it again, and what's most noticeable is what looks like horizontal scan lines rising up light colored surfaces mostly in the background, and when the camera moves, it accentuates this. Maybe flicker is the wrong description.

There is some pulsing but I think that must be where the whites are blown out.

There's a jpeg frame grab for a freeze-frame where the field lines are obvious, so I went to my project & checked the properties of the event and it says "progressive" - which I guess is the default for a frame-grab? ...so I clicked "reduce interlace flicker" on that same tab, and the field-lines went away. Hmmm.


Thanks


farss wrote on 12/26/2008, 1:33 PM
If you're going to use a frame grab as a still you should de-interlace it before putting it onto the T/L. I use PS's video filter for this as it lets me choose which field to use, sometimes one field is better than the other. You could also try Mike Crash's Smart De-interlacer plugin to get a de-interlaced frame from Vegas.
The other alternative is to set the project's de-interlace method to Interpolate and field order to None before you grab the frame.

Bob.
ScorpioProd wrote on 12/27/2008, 2:29 PM
Also note that the reduce interlace flicker setting inside of DVDA is only for the menus, not for the video.

Unlike setting it for clips inside of Vegas.
johnmeyer wrote on 12/27/2008, 2:54 PM
Would it be better to render in Vegas as progressive rather than use the DVDA "reduce interlace flicker"?1. Render in Vegas, not in DVDA. Better results.

2. Don't ever render video from a DV camera as progressive if your goal is to burn a DVD and watch on a TV set. It will always look worse.

3. Interlace flicker has nothing to do with jaggies. It is instead the strobing effect you get on thin horizontal lines (although you can see it in other ways on other objects).

If you have jaggies, it may be caused by a camera that uses too much sharpening (some DV cameras do this), or by an fX you have added in Vegas.

If you have any resolution changes or PAR changes, you can try changing the Vegas rendering setting (in the Custom tab) to "Best" (default is "Good"). This will not help if you don't have resolution changes, but it's easy to make a test with a few seconds of footage and then burn it on a DVD re-writeable. Whenever you have a problem like the one you're having, I always recommend taking 10-50 seconds of problem footage, and encoding it using a variety of different settings. It usually helps you pinpoint both the problem and the solution.