Help Version 19.0.2017.10.27
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#include "ltwrappr.h"
virtual L_INT LWia::StartVideoPreview(bStretchToFitParent)
L_BOOL bStretchToFitParent; |
specifies whether the video display is stretched to fit the parent window |
Starts the video preview. You can specify the parent window or control where to start the video preview by calling the LScanner::SetWindow function before calling this function.
| Parameter | Description | |
| bStretchToFitParent | Specifies whether the video display is stretched to fit the parent window. Possible values are: | |
| Value | Meaning | |
| TRUE | Stretch the video preview to fit the parent window. | |
| FALSE | Video is displayed in a supported resolution smaller than the parent window. | |
SUCCESS |
The function was successful. |
< 1 |
An error occurred. Refer to Return Codes. |
This feature is available in LEADTOOLS version 16 or higher.
This function will start the video stream preview in the window or control specified using the LScanner::SetWindow function.
This function will internally set the image directory of the captured still images to the device's default path unless you called the LWia::SetPropertyString function using the WIA_DPV_IMAGES_DIRECTORY property ID and the directory path you wish to use before calling the LWia::StartVideoPreview function.
Required DLLs and Libraries
LTWIA For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application. |
Functions: |
LWia::ResizeVideoPreview, LWia::EndVideoPreview, LWia::AcquireImageFromVideo, LWia::IsVideoPreviewAvailable, LWia::InitSession, LWia::EndSession, Class Members |
Topics: |
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For an example, refer to LWia::IsVideoPreviewAvailable.