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on a TV screen. Remember to take into account which medium will be your primary
mode of display.
• Play after creating plays the resulting video file after its creation. This can serve as
a signal that the rendering has finished.
• Perform SmartRender speeds up the creation process by reusing previously saved
video, re-rendering only the areas modified since you last created the video. (You
must use the same file name and destination.) Video Editor detects these differences
by monitoring the changes made to the video project and matching those with the
existing video file.
• Perform auto de-interlace merges interlaced video sub-frames into full-frame
video. Select this option if you have interlaced clips in the Timeline and you want to
render a frame-based progressive scan video file.
• Key frame control allows you to control the placement of key frames for
compression schemes that support interframe compression (such as Cinepak). This
can help the compression algorithm emphasize important segments.
• Cropping displays a dialog box where you can modify the frame dimensions of the
video.
Cropping is a useful method for controlling the frame size of a video without having
to resize the actual frames. This is important as resizing frames resamples the
original video, resulting in distortion and loss of quality. The downside though is that
you need to remove data which may or may not be important. Cropping is also good
for removing unwanted noise that may occur around the edges of a video due to bad
capturing or copying.
Cropping dialog box:
• Cropping specifies the area of the video that you want to crop (remove) from the
resulting video file. You can enter values in the spin boxes provided in the
Cropping group box or drag on the control points on the preview image.
• Keep original size resamples the cropped video so that it maintains the specified
frame size (this does produce degradation however, depending on the amount of
resampling involved). After resizing the control box you can move its position by
dragging it. (Use the slider beneath the window to preview how your changes
affect the video.)
Video Save Options: General tab
• Data track specifies whether to create a video file of the video track only, or both
the video and the accompanying audio track. (To save the audio track only click the
File: Create - Audio File command.)
• Frame rate specifies the frame rate to use for the resulting video file. For example,
NTSC video is typically 29.97fps. See your capture board's manual for specific frame
rate advice.
CHAPTER 7: CREATING AND EXPORTING FINAL VIDEO 157
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