User Manual

418 | CHAPTER 23
Video tab
The Video tab in the Preferences dialog controls the display of video media, video events and video tracks.
Preference Description
Dynamic RAM Preview max
(MB)
Determines the size of the RAM cache for building dynamic RAM previews in the
Video Preview window.
For more information, see Building dynamic RAM previews on
page 350.
Maximum number of
rendering threads
This setting specifies the maximum number of threads that will be used for rendering
files.
Increasing the setting will not increase performance beyond the number of available
processors; for example, if you have a single-processor computer, choosing 2 will not
improve rendering performance.
Decrease the setting if you have a multiprocessor (or multicore) computer and want to
limit processor use or turn off multithreaded rendering. For example, if you had a
dual-processor hyperthreaded computer, choosing 3 would allow you to keep one
thread available for other tasks while rendering.
GPU acceleration of video
processing
Many built-in video processing functions and video plug-ins in Vegas Pro support GPU
acceleration. To enable GPU-accelerated video processing, choose a device from the
GPU acceleration of video processing drop-down list.
Choose Off to turn off this feature.
Notes:
• Only compatible devices are displayed in this list.
• The GPU Accelerated folder in the Transitions, Video FX, Media Generators, and
Compositors windows allow you to easily identify GPU-accelerated plug-ins.
• For the latest information about supported hardware, please see our Web site at
http://www.sonycreativesoftware.com/vegaspro/gpuacceleration.
Show source frame numbers
on event thumbnails as
Display frame, time, or timecode numbering on video event thumbnails.
Thumbnails to show in video
events
Choose a setting from the drop-down list to choose which thumbnails you want to
draw in video events.
• None: No video frames are displayed.
• Head: Only the first frame is displayed.
• Head, Tail: The first and last frame are displayed.
• Head, Center, Tail: The first, middle, and last frames are displayed.
• All: All frames are displayed.
Tip: If you want to toggle audio waveforms in events, choose Audio Event
Waveforms from the View menu.
Use external video capture
application
Select the check box and browse for the application to be launched when you click
the Open Video Capture button (
).
Action safe area Sets the reference overlay safe areas in the Video Preview window. For more
information, see Identifying safe areas on page 352.
Title safe area
Horizontal grid divisions and
Vertical grid divisions
Sets the spacing of the grid overlay in the Video Preview window used in aligning
visual elements in a project.
For more information, see Changing grid spacing on page
406.
Display at project size Sets the Video Preview window to always display the video at full project size.
Simulate device aspect ratio Determines how the video is displayed in the Video Preview window. In short,
televisions display rectangular pixels and computer monitors display square pixels.
This can result in a distorted preview, although the source media and rendered video
is unaffected.
Background color Sets the background color of the Video Preview window (black by default) that shows
either when there is no visual content or when using a transparent overlay with no
background visual content.