Adjusting Capture Settings with the Log and Capture Video Scopes
The video scopes in the Log and Capture window include the Waveform Monitor and
the Vectorscope. If you are capturing to a Y´C
video format, the entire range of the
scope is displayed (from –10 percent to 109 percent). However, if you are capturing to
an RGB codec, the range is limited to 0 percent to 100 percent.
To use the built-in Log and Capture video scopes to adjust your clip settings:
Make sure your video deck is connected to the video interface in your computer.
Cue the videotape to the color bars recorded at the beginning of the tape.
Choose File > Log and Capture, click the Clip Settings tab, then click the Video
The Waveform Monitor and Vectorscope appear below the Log and Capture window.
On the left is the Waveform Monitor, which displays the brightness levels of the color
bars within the video frame as a graph. Each “step” of the graph corresponds to one of
the color bars. The goal is to adjust the brightness and contrast so that the levels of the
bars match their ideal targets, shown in purple.
Note: Don’t worry if the graph appears to be “noisy”; this is normal for analog video
played back from tape.
Color Correction and Video Quality Control
To display the ideal targets for color bars, Control-click in the Waveform Monitor or the
Vectorscope and choose Targets from the shortcut menu.
Adjust video brightness and contrast using the Waveform Monitor for reference.
Different third-party video interfaces have different controls for adjusting the video
signal being captured.
Â If your video interface uses Brightness and Contrast sliders:
Â Adjust the Brightness slider so that all of the bars in the Waveform Monitor are set
near the upper purple targets in the background.
Â Adjust the Contrast slider so that the tops of the bars and the bottoms in the
Waveform Monitor are within the boundaries of the top and bottom targets.
Â Continue adjusting the Brightness and Contrast sliders until there is an acceptable
range of brightness between the 100 and 0 percent targets.
Â If your interface uses Black Level and White Level sliders:
Â Adjust the Black Level slider so that the third bar from the left is at the 0 percent
target toward the bottom of the Waveform Monitor.
Â Adjust the White Level slider so that the second bar from the left is at the
100 percent target at the top of the Waveform Monitor.
Choose Targets from
the shortcut menu.
Measuring and Setting Video Levels
Adjust the clip’s hue and saturation using the Vectorscope for reference.
The Vectorscope is on the right and displays the color values of the different areas of
the video frame as a point graph. Each point on the circular graph represents one of
the color bars. The goal is to line up these points with their respective targets.
Adjust the Hue slider to rotate the points around the center of the graph.
Adjust the Saturation slider to move the points closer to or farther from the center of
the graph. If this slider is properly adjusted, each point falls within a purple target box.