When a single pixel height image is brought into Nuke it does not update correctly in the Viewer. It will neither playback in real time, nor animate or move unless the channel information is adjusted via the Viewer controls.
Customer reported version
nuke.11.0v3
Customer reported platform
windows10
Steps to reproduce
1) Paste the following script into a Nuke session:
set cut_paste_input [stack 0]
version 7.0 v10
ColorWheel {
inputs 0
gamma 0.45
rotate {{"-\[frame]"}}
name ColorWheel1
selected true
xpos -227
ypos -195
}
Reformat {
format "9 1 0 0 9 1 1 Small"
name Reformat1
selected true
xpos -227
ypos -100
}
2) Note that the ColorWheel node has a simple rotate expression designed to rotate the image on every frame thus changing the viewer output on every frame.
3) Press the Play button on the Timeline and note that the Viewer does not update despite the animated ColorWheel.
4) Change the output channel of the Viewer to any option outside of the default option, eg Red Channel 'R' then back to the default.
*This will not update in real time but it will display the changes in the specific frame however these changes will be in grayscale and not in the correct colors.
Workaround
Unknown.
Reproduced by support
This bug has been reproduced in:
Nuke 11.1v1 - Windows 10 - CentOS 7.4 - MacOSX 10.13
Earliest version tested
Nuke 7.0v10 Windows 10 - CentOS 7.4 - MacOSX 10.13 Appears in all versions.
Expected behavior
The viewer would update regularly on a per-frame basis.
Actual behavior
The viewer does not update unless forced to via the manually changing the channels of the image being displayed, this does not work on in real time.