User guide

Viz Engine Administrator’s Guide

Video input channels are enabled in this section. To be able to use a Live input channel,

a Clip channel or a Stream channel, it first has to be set to active in this panel.

The frequency of the channels is defined in the Output Format section.

This section contains information on the following topics:

• Live and Clip Channels

• No Onboard Video Board

Live and Clip Channels

This panel activates the Live input and Clip channels and defines the video standard

that the channel is configured to. It is possible to mix video standards, for example, a

Viz Engine configured to play out 1080i50 can have inputs configured to SD.

Clip channels are for video clips. Clip Channel 1 and Clip Channel 2 must be configured

to the same video standard.

• Live w/Alpha: For the Input this will combine the two (Live 1 and Live 2) channels

to one channel carrying fill and key. This means that the Y (luminance) from Live 2

in YUV will be used as the key signal.

• Clip Channel w/Alpha: When enabled the clip file must either contain key

information or a key clip must be provided. The key clip must have the string

“_key” appended to the filename. For a clip named i422_50M.avi this would be

i422_50M_key.avi.

Note: Video input format may be limited by hardware capabilities on the video

board (for example Targa boards only support SD, and Matrox 6000 series boards

does not support HD clips).

Stream Channels

The Stream channels are for live video streams (see External Video Stream Through

Texture in the Viz Artist User Guide). Set each Stream to active or inactive.

No Onboard Video Board

Video input settings without video board