Capítulo 4. Introducción a Don Lazarillo Vizcardi
4.1 Prolegómenos. Interés en tratar la materia musical
Smart Search
The Smart Search feature refines the loaded video footage based on motion detected within a user-defined region.
To perform a Smart Search, you must first define or “mask” a motion detection region. To do this, click Show Mask and draw on the playback image. Any time a clear area is clicked on, the mask is expanded.
Alternatively, when a masked area is clicked on, the mask is removed. Click the Smart Search button to perform the search. Once the search is complete, only video frames that contain motion in the masked region will be loaded for playback.
Note: If there is more than one masked region (i.e. two or more disconnected masks), the Smart
Search will load video frames that contain motion in any one, not all, of the regions.
Show Mask Shows/hides the smart search mask. A mask can only be edited when the Show Mask button is latched on.
Mask
Offers some quick options for modifying masks:
Clear – Erases all masks on the image.
Select All – Masks the entire image.
Invert - Swaps clear and masked areas.
Note: The Show Mask button must be latched on for these options to be available.
Sensitivity
This slider controls the sensitivity of the motion detection algorithm used by the Smart Search function. To the left is less sensitive, requiring larger change in motion; to the right is a more sensitive, detecting smaller movement.
Smart Search
Performs the Smart Search. Video frames that do not contain motion in the masked regions are removed from the loaded footage. Use the buttons to skip back/forward to the next Smart Search frame.
Reset Removes all Smart Search masks and restores the originally loaded footage.
Visual Track When enabled, the Visual Tracking feature tracks moving objects by the placement of white corners around the object.
Analytics Displays a menu where Video Analytics information can be overlaid on the playback footage.
Zoom
Playback footage can be zoomed by selecting the Zoom tab from the Advanced Features section. When the cursor is moved over the Playback window, a zoom outline will be displayed to indicate the region that will be magnified. Left-clicking zooms in and right-clicking zooms out of the image. Zoom In and Zoom Out buttons are also available in the Zoom tab.
The magnification factor is displayed in the upper right-hand corner of the Playback window.
Adjust Image
When playback is paused, you can adjust the image by selecting the Adjust Image tab from the Advanced Features section. The adjusted image can be exported or printed.
Brightness Adjusts the brightness of the current frame.
Contrast Adjusts the contrast of the current frame.
Grayscale Toggles between a grayscale and color image. Only still images will export in grayscale.
Reset Returns the image to its default values.
Note: Only a paused image can be adjusted; adjustment of footage during playback is too CPU
intensive. Any adjustment you have made will be reapplied when footage is paused again.
Markers
During playback, if only a sub-range of the loaded footage is of interest it can quickly be selected by using Markers. To use Markers, select the Markers tab from the Advanced Features section.
Start / End Range
Position the footage navigation slider at the beginning of the sub-range and click the Start Range button. You will notice a small marker appear below the starting point. Next, navigate to the end of the sub-range and click the End Range button.
Clear Removes the sub-range markers. If the sub-range is cleared when the View button is latched on, the playback will return from the sub-range to the fully loaded footage.
View Loads the sub-range for playback. The playback information will indicate that a sub-range is currently displayed. All of the playback controls will operate on only the sub-range of footage.
Note: If multiple cameras are loaded for playback in Multi-Screen mode, each camera can have its own unique sub-range of footage.
Note: If a sub-range has been defined, only the sub-range will be saved when video is exported.
Buffering
Depending on your Network/Internet bandwidth, it might be useful to configure the playback caching. Using Autosense for the most part will be the most efficient. Only advanced users should attempt to adjust the buffering settings.
Auto Sense This is the default value and the recommended setting. It will enable the buffering to become dynamic and change as required.
Buffering Connections
Changes how many buffering connections will be used. Each buffering connection opens a TCP connection to the DVR, increasing possible bandwidth; but may be limited on CPU usage, as well as the maximum throughput to the DVR.
Look-ahead x Frames
This is the number of frames that VIGIL Client will buffer during playback. Settings from 30 to 1800 frames are available. A higher number of Look-Ahead frames is recommended for DVRs recording at higher frame rates.
Cache All Cache the entire video.
Audio Playback
If audio recording is enabled and configured in the DVR settings, the Audio tab will become available in the Advanced Features section of the Search window. Selecting an audio channel from this tab allows you to playback recorded audio along with video footage.
To choose which audio channel to playback, select the channel from the drop-down menu in the Audio tab.
All Audio When selected, all audio from the specified channel is played back even when there is no corresponding video footage for the playback time.
Video Only Audio When selected, audio from the specified channel is played back only when there is corresponding video footage for the playback time.
This Audio Level Meter indicates the signal strength of the currently playing audio.