ViEVO (EVO video application)


 

When ViEVO starts, the main window will appear with its initial size and position on the screen. ViEVO immediately starts to display all received videos in the Presence section (see Display sections). Displayed videos are represented by 3D objects (see Video component) and together with controls, labels and background picture they are composing the display. NOTE that for first time ViEVO starts with “Select all” display mode as default.

To resize the main window you can drag top, bottom, left or right edge of the window using your mouse (Windows, Linux) or you can use the resize button at bottom right corner. NOTE that all settings with size and position of ViEVO window will be saved automatically when application is closed (when leaving the EVO meeting).

 

Video component


Each received video stream is represented by a video component with a participant’s name on the top bar of the window. Position, size and shape of each displayed video component depend on the chosen display mode, size and position of window.

The speaker’s video component will be automatically marked with speaker indication icon in the top-left.
When pointing the mouse cursor above the video component the “info icon” appears. By clicking on it you can display the information about the current bit rate, frame rate, resolution and codec of the video component. To return back to the normal view you should click again on icon.

 

Detached window



When pointing the mouse cursor above the video component the “detached icon” appears. If you click on it, the selected video component will be shown in a separate, detached window. This detached window can be moved and resized independently of the main ViEVO window. If you will move the mouse cursor on top of the detached window, the “full screen icon” appears.

By clicking on it you will have this detached window displayed in full screen mode.
 

Video Arrangement Default View


The ViEVO window is divided into two sections “Display Mode section (top)” and “Presence section (bottom)” where video components can be displayed. Presence section is meant especially for general overview of all video components (received videos). Display mode section is used for displaying selected video components from Presence section according to the chosen display mode (Toolbar->Display modes menu).

 
To ensure maximum display efficiency (especially if there is large number of video components) you can adjust vertical size of Presence and Display mode sections by using a “virtual” splitter. Actual vertical position of the splitter is indicated by two small arrows on the left and right window edge as it is shown on picture. To enlarge/reduce vertical size of sections point your mouse between these two arrows and use mouse dragging in a vertical direction.
NOTE: There is a limitation for minimum size of Presence and Display mode section which depends on the current size of the ViEVO window. When resizing the whole window the Presence section will maintain its size in vertical direction (height).

 
 
Presence section
Video components are displayed on the mirrored floor in one horizontal row with potential 3D rotation. The degree of 3D rotation depends on number of video components and width of the section. Horizontal scroll bar will appear automatically if there is not enough space for all video components. There is an automatic focus feature on speaker’s video component and focuses on the video component pointed by the mouse. The focused video component displays in frontal view (without rotation). Mouse focus has higher priority than the automatic focus on speaker’s video component.
NOTE: You can use scrolling of video components with the mouse moving over all video components in horizontal direction.
NOTE: To display all video components only in the Presence section you should choose display mode “None” from Toolbar->Display menu.
 
Display mode section
The display mode section is located in the top part of the window. Video components placed there are always displayed in frontal view automatically filling the free space. The display mode which was chosen in Toolbar->Display menu will manage how video components will be selected from Presence section and displayed in the Display mode section.
NOTE: To display all video components in Display section choose the “Select all” display mode.
 

Toolbar


Meeting info


 

On the top of the ViEVO window is the meeting information panel with the name of the current EVO meeting in the middle of the bar, with download bit rates on the left and upload bit rates on the right.
NOTE: Download bit rate takes into account all received video streams and upload bit rate is the video stream upload bit rate sent from your camera.

All necessary display and video camera managing options are organized in one expandable toolbar.
Click on the (near the Video Camera button) to fully expand the Toolbar.


 
Click on the if you want to hide this Toolbar.


 

Video Camera transmit button

allows you to switch ON/OFF your camera and also shows camera activity. Click on it to start/stop transmitting the video of your video camera.
 - Video Camera OFF
 - Video Camera ON
 
NOTE: Video you transmit is locally displayed in the different quality with respect to what other participants could see. They will see your encoded/decoded picture while you see the picture taken directly from your camera. To see what you are actually transmitting just click on the “Test sending Audio/Video (Loopback)” in Koala “Help & Test” menu.
 

Display modes



The chosen display mode controls the way (manual/automatic) video components will be selected from the Presence section and will be displayed in the Display mode section.
Click to select (manual) – Click on a video component in the Presence section to display it in the Display mode section. If you click on a video component in the Display mode section it will return back to the Presence section.
Current speaker (automatic) – Only the current speaker’s video component will be automatically displayed in the Display mode section.
Discussion (automatic) – Each video participant who is a speaker at the moment will be automatically displayed in the Display mode section and participant, who is no longer the speaker, will be moved to the Presence section after some period of time.
Select all (automatic) – All (including new) video components will be displayed in Display mode section only. NOTE: In this case Presence section will be hidden.

None (automatic) – All (including new) video components will be displayed in presence section only. NOTE that Display mode section will be hidden.

 

Camera settings


Device – Will show the selected device (video camera) for video transmitting. Incase you have two and more devices connected to your PC you can select one from the list. To pick the preferred video camera you should click on small blue arrow. You can also switch between devices listed here “on the fly”. NOTE: If you don’t have any device (camera) plugged or installed on your PC the “Still Image” will be the only available option.
Resolution – Here you can select the resolution of the picture sent by selected device (video camera). You can switch between resolutions listed in this menu “on the fly”.
NOTE: The resolution list contains only resolutions supported by the selected device (video camera) and it may differ for different models and types of devices.
Pixel format – Will allow you to select the pixel (color space) format that will be used by the selected video device. Changing this format may help when there is some problem with the colors in the transmitted video.
Video norm – You can select a required video format (PAL, NTSC…) for your selected device (typically TV capture card).
NOTE: Video norm menu will not be displayed in the Camera settings menu for selected device which can not support this option.
Video input – You can select a required video input (Video Composite, S-Video, HDMI….) for your selected device (typically TV capture card).
NOTE: Video input will not be displayed in the Camera settings menu for selected devices without any video inputs such as webcams.
 

Video parameters



Bandwidth – There is a slider to control the maximum amount of bandwidth used by the video sent. It ranges from 20kb/s to 1Mb/s.
NOTE: You can’t set the bandwidth of received video streams in ViEVO
NOTE when HD resolution (720p50, 1080i50...) is selected the maximum selectable bandwidth may be higher.
Framerate – There is another slider to control the video frame rate. It ranges from 1 to 30 frames per second (f/s).
NOTE: Quality factor of the transmitted video will be automatically adjusted to not exceed output bandwidth with specified frame rate. The maximum Framerate may be limited (to 10 or 15 fps) or increased according to the supported frame rates of the selected Device and the selected Resolution in the Camera setting menu.

For more information about ViEVO please read the "ViEVO Advanced Info" documentation.