Grass Valley XtenDD v.4.0.x User Manual

Page 40

Supplement Software Release V4.0.x

XtenDD / DD35 Production Switchers

Operating Instructions -- Rev. 2 / 1.2003

2.15

TIPS AND TRICKS FOR DVX OPERATION

1. When you reduce the size of a channel with an added border, you will find the

border switching on/off randomly when the image size approaches zero. This

is caused by rounding errors when the border size is near to one pixel.

Solution:

Use border width ”0” for the keyframe with size ”0”, and/or use border softness

for the keyframe with size ”0”.

2. The adaptive filtering to avoid moire--effects does not work for a resulting z--

value smaller than zero. (Resulting z--value means the sum of the 3D--locate

z--value and the 3D--global z--value)

Solution:

Use the 3D--locate z--value to reduce the size of the image, and NOT the 2D--

Source size value.

3. The combiner tally calculation switches the tally off for channels which are com-

pletely covered by another channel. In the actual software there are some limi-

tations to it:

The calculation is always done based on z--priority, no matter whether the
according channel is set to fixed priority or not.

A possible z--offset is not taken into consideration for the tally calculation.

Since the actual software does not yet support softness for intersecting im-
ages, in case two channels have identical z--values and rotation values

(both images should be visible simultaneously), the lower channel number

is visible. Due to rounding errors the covered channel is tallied as well, de-

pending of the actual z--value.

Solution:

Increase the z--value of the covered channel by 0.001. This change is invisible,

but it fixes the tally problem.

When using pageturn effects, the channels are tallied, even when the pa-
geturn is paged out.

Solution:

Set 3D--Locate x--value to e.g. ”10.0” in the ”paged out” keyframe, and set the

trajectory for the 3D--Locate x--value of the PREVIOUS keyframe to ”jump”.