Operation Manual

470 | APPENDIX B
Peak File (.sfk)
Vegas Pro software displays the waveform of audio files graphically on a computer monitor. This visual information must be
generated by Vegas Pro software when the audio file is opened and can take a few seconds. Vegas Pro software then saves this
information as a peak file (.sfk). This file stores the information for displaying waveform information so that opening a file is almost
instantaneous. The peak file is stored in the directory in which the file resides and has an .sfk extension. If the peak file is not in the
same directory as the file, or is deleted, Vegas Pro software regenerates it the next time you open the file.
Pixel Aspect Ratio
Computers display pixels as squares: 1.0. Televisions display individual pixels as rectangles: 0.9091 (NTSC DV, D1), 1.0926 (PAL DV,
D1), or other rectangular variations. Using the wrong pixel aspect ratio can result in distortions or stretching of the video. You can
set the pixel aspect ratio in the Project Properties dialog or, when rendering, in the Custom Template dialog. You should choose the
aspect ratio based on the final movie’s destination. Consult your hardware manual if you are in doubt about the appropriate ratio.
The pixel aspect ratio is unrelated to the frame’s aspect ratio.
Plug-In
An effect that can be added to the product to enhance the feature set. Vegas Pro software supports DirectX compatible plug-ins.
The built-in EQ, Compression and Dithering effects are also considered plug-ins because they work in other DirectX-compatible
applications.
Plug-In Chain
Plug-ins can be strung together into a chain so that the output of one effect feeds into the input of another. This allows for complex
effects that couldn’t otherwise be created.
Pre-roll/Post-roll
Pre-roll is the amount of time elapsed before an event occurs. Post-roll is the amount of time after the event. The time selection
defines the pre- and post-roll when recording into a selected event.
Preset
A snapshot of the current settings in a plug-in. Presets are created and named so that you can easily get back to a sound or look that
you have previously created.
A preset calls up a bulk setting of a function in Vegas Pro software. If you like the way you tweaked that EQ, but do not want to have
to spend the time getting it back for later use, save it as a preset. Presets appear in the top of plug-in windows in Vegas Pro software.
Pulldown
In telecine conversion, fields are added to convert 24 fps film to 30 fps video.
In 2-3 pulldown, for example, the first frame is scanned into two fields, the second frame is scanned into three fields, and so on for
the duration of the film. 2-3 pulldown is the standard for NTSC broadcasts of 24p material. Use 2-3 pulldown when printing to tape,
but not when you intend to use the rendered video in Vegas Pro software. Removing 2-3 pulldown is inefficient because the
pulldown fields that are created for frame 3 span two frames:
24 fps film (top) and resulting NTSC video with 2-3 pulldown fields (bottom)