VIAN 0.4.2¶

VIAN 0.4.2 is out, with many new and improved tools. To make the change as easy as possible for you, here are the most important changes to note.

Perspectives¶

Since VIAN is now also capable of segmenting a movie, a new perspective called Segmentation has been added. While Windows users can already customize their interface freely, this is not yet possible on OSX due to a bug in libVLC. Since most of the windows are only rarely used in a specific section of the Workflow, many windows have been hidden, to increase the size of the player and the timeline.

Remember that all Windows can be opened using the Window/ Menu on the very top.

The perspectives are now mapped as follows:

Note

Keyboard Mapping

Alt + 1: Player
Alt + 2: Segmentation
Alt + 3: Annotation
Alt + 4: Screenshot Manager
Alt + 5: Node Editor

Player Perspective¶

Segmentation Perspective¶

Annotation Perspective¶

Screenshot Perspective¶

Node Editor Perspective¶

Note

Keyboard Mapping Windows To further improve the fast changing of current windows, one may use the new Hotkeys to toggle specific Windows:

Ctrl + O: Outliner
Ctrl + I: Inspector
Ctrl + P: Screenshot Manager
Ctrl + T: Timeline

Changing the Video-Source¶

Depending on the movie file you’re currently using and on how fine-grained your work in the timeline has to be, VLC might not give a sufficient frame-update rate. (You may only see one or two frames of a given second when sliding thought the movie)

To counter this problem, VIAN gives you the ability to ready every frame out of the movie. With 0.4.2, you now have the possibility to switch fast between those system by clicking on the Video Source Field, on the bottom-left corner of VIAN. You can now choose between three different options:

Always VLC will use VLC to read the current frame when scrubbing though a movie.

Always OpenCV will use OpenCV to read the current frame.

Timeline Scale Dependent when you have zoomed out relatively far on the Timeline VLC will be used,
if your time magnification is relatively high, OpenCV will be used.

Selecting the Video Source in VIAN.¶

Annotation are Time-Independent from their Layer¶

Until now, an Annotation has been part of an Annotation-Layer, which itself had a start and an endpoint. This has always been a confusing and impractical concept and has now been changed.

In VIAN 0.4.2, Annotations have their own start end endpoint. Layers only control the visibility of the Annotations which can be toggled with a right mouse-click/Hide Layer in the Timeline.

The new look of the Timeline with each Annotation having it’s own bar.¶

Extensive List¶

PlayerControl: has now Image based buttons to improve the look.

Timeline: Slider can no longer pass the begin or end of the movie.

Timeline: jumps to the next time frame when the slider reaches the end of the current time-in-view.

Timeline: Small Time indicator is shown when using the Slider. This can be turned of in Timeline/Display/

ScreenshotExport: Indicating Quality percentage now.

ScreenshotManager: Zooming should now work reliably

ScreenshotManager: Ctrl + A for selecting All

ScreenshotManager: Show a Loading Sign during loading of Screenshots

ScreenshotManager: Slider is deactivated when the Arrangement is dynamic to avoid confusion.

Timeline: When no Project is Open, the Timeline is not active.

PlayerControls: When no Project is Open, the Controls are disabled.

OpenCV per Frame is now moved in it’s own thread.

FPS is now collected by OpenCV as it is more reliable especially before the User has played the movie.

Annotation and Segmentation Perspectives

Rearranging the Windows in the perspectives

Automated Text Annotations by any data from the Project

Analysis: MosaicPlot added.

Welcome Window is now in the Documentation

OpenCV Frame is now in the Background of the Annotations

Annotations are not shown in the Segmentation Perspective

Numpy and Pickle implementation for Async Loading and Saving of large data