Bluefish444 Create3D Manual do Utilizador descarregar pdf (Página 92)

The video hardware setup window lists your broadcast video input and output options. A new

feature since Nemo3D V3.0 is that you can use multiple video i/o boards, even from different

manufacturers, and you can have up to two independent and simultaneous outputs (with or

without key) and two inputs. You can select and set up your choice of available video i/o boards

and configure its settings.

The first two entries in the Outputs section always represent the two VGA preview windows.

These are available even if you have no broadcast i/o boards in your PC and you use it for

preview only. Each entry in the list has for parameters:

1. Name of the output option/video card.

2. Use: if this option is set, the output option is active either as Video Output 1, or – if it is

not the first available i/o option – as Video Output 2.

3. Video Mode: the resolution and video standard you wish to use. There are four SD and

four HD modes available. Care should be taken to set the same video modes for VGA

preview 1 and Video Output 1, and VGA preview 2 and Video Output 2 respectively.

4. Keying: if you wish to use external keying, like CGs usually do, you can set this

parameter to external. Other modes available are None and Internal for internal keying.

Other settings for video outputs are:

5. Mixing type: This can be either non-premultiplied or unshaped and premultiplied or

shaped. This setting depends on the vision mixer that recieves the signal from your video

board and mixes it with other signals from other sources. Most vision mixers work with

non-premultiplied outputs, i.e. the graphics or fill output is not being multiplied by the key

output before downstream mixing occurs. From a practical viewpoint this means that the

color of a pixel belonging to a white, but 50% transparent rectangle is RGBA = 1,1,1,0.5 .

If you use premultiplied mode, the same pixel would be RGBA = 0.5,0.5,0.5,0.5.

6. Pvw size (preview size): is the ratio of the size of the preview window in run time mode

compared to the video resolution used. E.g. a setting of 0.5 in case of 1080i HD

resolution means a preview window sized 960*540. If you use dual output from the same

PC and would like to reserve as much space as possible for NemoPlay, the playout

application, you should make do with smaller sized previews.

7. Test image: By clicking on this button, you can display an image on your output to help

with setting up your broadcast video hardware and the way its signals are being handled

by the downstream vision mixer.

8. Preview as snapshot: If checked, the second output channel is used as an independent

static preview. The static frame representing the content of the Page played back is

chosen when you save a thumbnail representation of the Page. If you create the

thumbnail at frame 100, then the previewed snapshot is always created from frame 100.

Usually, the last frame of the animation is used (when every object is animated on), but

this way you can set any frame you like.

9. Video as Key: unused at the moment.

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Bluefish444 Create3D Manual do Utilizador Página 92