Stabilization – interlacing artifacts

[James Donnelly]

I will answer my own question.

The media properties of the clip were set to Field Order: Upper field first. Switching this to progressive solves the combing artifacts on the stabilized take.

How come Vegas couldn’t detect that my Cineform clips are progressive?

Incidentally, the CPU usage for playing back stabilized clips is much higher. This is made less severe by going into the switches for the clip and changing from ‘smart resample’ to disable resample.

I don’t understand this. My timeline is 25 fps, and my clip is 25 fps, so why would that setting have any affect.

Also, why would stabilized clips play back less smoothly at all?

Any answers to these questions would be gratefully received.

[Brad Miller]

Not sure, but here’s a script to make all your clips progressive:

/**
* This sample script sets the field order of all media with a video
* stream to progressive scan.
*
**/
using Sony.Vegas;

public class EntryPoint {
public void FromVegas(Vegas vegas) {
// Set the following variable to the VideoFieldOrder value you
// wish to have all video streams use.
VideoFieldOrder targetFieldOrder = VideoFieldOrder.ProgressiveScan;
foreach (Media media in vegas.Project.MediaPool) {
if (media.HasVideo()) {
VideoStream videoStream = (VideoStream) media.Streams.GetItemByMediaType(MediaType.Video, 0);
videoStream.FieldOrder = targetFieldOrder;
}
}
}
}