ViewCast 240E, 450E manual Reference Size for Crop and Logo Placement

Setting Driver Properties

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.

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