User Manual

PREVIEWING AND ANALYZING VIDEO | 349
The Auto setting will adjust the frame size to fit the Video Preview window size. The Full setting processes frames at the project
frame size. The Half setting processes frames at half the project frame size. The Quarter setting processes frames at one-quarter of
the project’s frame size. For example, if you have an NTSC (720x480) project, Half creates a 360x240 preview; Quarter creates a
180x120 preview.
If you want to display square pixels in the Video Preview window even if the Pixel aspect ratio setting in the Project Properties
dialog is using nonsquare pixels (DV), right-click the display and choose Simulate Device Aspect Ratio from the shortcut menu.
If you want the preview to fill the Video Preview window, right-click the display and choose Scale Video to Fit Preview Window
from the shortcut menu.
This setting is used for previewing only and has no effect on the final rendered video. Decreasing the preview resolution can allow
the Vegas Pro Video Preview window to display a higher frame rate, especially for complex projects that contain overlays,
transitions, and effects.
Prerendering video
There are times where nothing but a full, high-quality preview will do. In these cases, Vegas Pro software can take the time
necessary to selectively render only the portions of your project that need extra processing. These sections are prerendered and
short files are created to use for previews. The prerendering can take anywhere from a few seconds to a few minutes, depending on
the length and complexity of the video.
Once these temporary files have been created, they are used whenever those sections of the project are played back, increasing
playback quality and performance. As long as no changes are made to the events in the prerendered sections, the newly created
files continue to be used for previews, even if changes are made to other sections of the project.
1. To prerender a portion of the project, create a selection containing the portion you want to prerender.
2. From the Too ls menu, choose Selectively Prerender Video. The Prerender Video dialog appears.
3. Select the type of prerender file to create in the Prerender as drop-down list. Click Custom to configure any custom
compression options.
4. To preview just a portion of the project, verify that Render loop region only is selected. To create a prerender of the entire
project, clear this check box.
5. Select the Stretch video to fill output frame size (do not letterbox) check box when you are rendering to an output format
with a slightly different aspect ratio than your project settings. This will prevent black bars from appearing on the top and
bottom or the sides of the output.
6. Click OK. A progress bar displays the progress of the render.
Tip: Choosing a Quarter or Half setting can improve playback performance when previewing high-definition source material.
Tip: Try setting the preview quality to Preview > Full and enabling Scale Video to Fit Preview Window.
Note: To view the effects of the deinterlacing method you chose in your project properties, you will need to use the Good or Best
quality preview mode. The Draft and Preview quality preview modes do not deinterlace.
Notes:
• You’ll need to choose a rendering template that inserts pulldown fields to create a standard DV file if your project properties are set to
24p or if you selected the Allow pulldown removal when opening 24p DV check box on the General tab of the Preferences dialog.
Use the NTSC DV 24p (inserting 2-3-3-2 pulldown) template if you intend to use the file on the Vegas Pro timeline.
• If you cleared the Allow pulldown removal when opening 24p DV check box before adding your media and your project
properties are not set to 24p, your 24p video is read as 29.97 fps interlaced video (60i), so you can choose whichever NTSC DV or PAL
DV template suits your project requirements.