Picture -in-picture artifacts

ramman001 wrote on 12/6/2011, 12:19 AM
I am using VMS 10 and have two video tracks set up; a main video track and multiple events on an upper track. These events are individually brought in and then removed at various times for short periods using the Video FX picture -in-picture plugins. I have the PIP sized to be about 25% of the main video area. When I add to the event the Video FX sharpen plugin the PIP appears fine in the preview window but after rendering I get line artifacts (not shadowing) as movement occurs in the inserted PIP video. If I turn off (deselect in the FX chain) the sharpening plugin these artifacts disappear. I am asuming this has something to do with the interlacing. I've tried both unsharpen and sharpen plugins but the sharpen does the best job. Is there a way to sharpen the PIP inserted video events without causing the artifacts to appear?

Comments

Steve Grisetti wrote on 12/6/2011, 7:21 AM
Have you tried rendering the timeline before you play it?
ramman001 wrote on 12/6/2011, 8:40 AM
I'm not sure what you mean. If you mean have I run "Preview in Player" to view problem areas, yes I have and the artifacts showed. If this is not what you mean, could you please elaborate?
Steve Grisetti wrote on 12/6/2011, 4:21 PM
No. This would be the process of rendering the timeline as a temporary video file so that the program doesn't have to do it on the fly whenever it plays back video that has effects applied to it.
ramman001 wrote on 12/6/2011, 7:03 PM
Steve,
How would I do this and incorporate it into my final render?
richard-amirault wrote on 12/6/2011, 7:35 PM
How would I do this and incorporate it into my final render?

No need to. What Steve is getting at is somtimes Vegas will show artifacts in preview that will not show in the final render.

If you render JUST the "problem" area and see it is fine then you need not do anything else. If it is still giving you a problem then you need to investigate further as to what is causing the problem, and what may solve it.
ramman001 wrote on 12/7/2011, 9:25 AM
The artifacts appear in the final rendered (MPEG2) version (not in the preview prior to rendering). They're somehow related to the sharpening plugin.. If I turn down the sharpening they disappear (but ofcourse I loose the sharpness I gain from the plugin.
richard-amirault wrote on 12/7/2011, 11:45 AM
I think that if you leave the plug-in on the clip, but turn it down to zero .. it will *still* sharpen some .. maybe enough.
TOG62 wrote on 12/7/2011, 12:31 PM
I would assume that the artefacts are present in the source material, but too faint to be noticeable. The sharpening is probably disproportionately emphasising them.