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222 VIDEO CAPTURE
dropped frame on playback, it keeps displaying the previous frame until the
dropped frame or frames have passed. If a video has dropped a large number of
frames, then the playback will look very choppy. To reduce the occurrence of
dropped frames, you can lower the quality settings for your video. For example, try
a smaller frame size, higher compression, or a lower frame rate.
Capturing single frames
Capturing a single frame does not require you to specify as much information as
when capturing a video sequence. This is because the single frame adopts the
currently displayed video frame size and data type, and is passed directly to your
chosen destination – to the clipboard or to disk. You can capture single frames
from either an existing video file or directly from a video source. In the program, a
camera shutter beep is available as a reminder. Also, there are three output
destinations: Production Library, Image File, and Clipboard. Also, a Jog bar is
also available to make capturing a single frame easier for you.
To capture a single frame:
1. Connect your DV camcorder to your IEEE-1394 interface card.
When acquiring video from an analog source, be sure that the analog
capture card you are using supports RGB or YUV capture.
2. Turn your camcorder on and set it to Play mode (or VTR/VCR mode).
3. Run Video Capture.
4. Select the frame you wish to capture.
5. Click Freeze on the Navigation Bar (Pause, if playing an existing file) or
Control: Freeze [space] to stop the video on the current frame.
6. Click Capture: Single Frame or press [F8]. The frame is sent to the chosen
destination. (If you are capturing to a file, the standard Save dialog box
opens.)
You can capture a single frame without freezing the video source or pausing a
video file. However, you cannot be sure which frame you will get.
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