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Setting Driver Properties
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The driver performs the source width adjustment in hardware if possible; otherwise it performs it in
software. The following table summarizes the behavior of the control. The Adds CPU column refers to
whether setting the control to a value other than 720 increases CPU usage beyond what is required by
other aspects of the format.
Video Type
Format
HW or SW
Adds CPU
Granularity
525-line
Square pixels
HW
No
1
CCIR
SW
Yes
4
Widescreen
SW
No
4
625-line
Square pixels
SW
No
4
CCIR
SW
Yes
4
Widescreen
SW
No
4
Reference Size for Crop and Logo Placement
Figure 29. Reference Size for Crop and Logo Placement
This part of the dialog is read-only because you do not set it directly – rather, it shows the results of
settings made elsewhere in the dialog.
The settings shown by the 525-line / 625-line buttons reflects the video standard selected in the Input or
Video Decoder tab (Figure 29). NTSC and PAL-M formats result in 525-line, 29.97 frame per second
video. PAL (other than –M) and SECAM formats result in 625-line, 25 frames per second video.
The Height and Width fields show the size of the incoming video based on all the settings you have
made. They reflect the video standard (NTSC, PAL, or SECAM) that you have selected on the Input
Property Page, and the setting in the adjacent Horizontal Format group. They are updated when you
click Apply.