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Capturing Video for Windows clips
The Captivator Pro/TV software includes a Video for Windows
capture driver which can be used with a Video for Windows
™
capture application, such as VidCap
, to record AVI movies. For
information on how to capture video clips refer to the
documentation supplied with your Video for Windows
application.
Capturing full screen and full motion video
The Captivator Pro/TV Video for Windows capture driver
captures data in raw RGB format corresponding to the number of
colors used by your display mode—256 colors (8 bits per pixel),
65 thousand colors (16 bits per pixel), or 16 million colors (24
bits per pixel). The bit depth that you use determines the size and
frame rate of the AVI clip that you can capture without dropping
frames—the greater the bit depth, the smaller the image must be
and the lower the frame rate.
Typically, a 486 66 MHz PC with a VL bus 928Movie should be
able to capture 320 x 240 16-bit images at 15 frames per second
to disk. (See Capture performance on page 30.)
It is not possible to capture full screen video at full frame rate
because your hard disk would quickly fill up. For example, an
8-bit 640 x 480 video clip, without audio, captured at 30 frames
per second generates more than 9 MB of data per second.
Therefore, when you capture video clips, you must decide
whether the size of the image or the frame rate at which you
want to play the clip is more important. If you are capturing a
clip which has little movement, such as a talking head, you do
not necessarily need a high frame rate. However, a clip with a lot
of movement, will look better if it is recorded at a high frame
rate.
Capturing Video for Windows clips
Contents 29
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