Example for managing videos (broadcasted by a Camera control)

ONLINE HELP
WINDEV, WEBDEV AND WINDEV MOBILE

Version:

Home | Sign in | English

This content has been translated automatically. Click here to view the French version.

Help / Developing an application or website / Controls, windows and pages / Controls: Available types / Camera control

Overview
Use example

WINDEV

WEBDEV

WINDEV Mobile

Others

See also

Example for managing videos (broadcasted by a Camera control)

Overview

In this example, the application allows you to:

view the camera preview stream currently being transmitted by the camera installed on the current workstation.
modify the configuration of the driver for video capture.
save the video currently broadcasted by the specified camera as an image (BMP file) or as a video sequence (AVI file).

Use example

To develop this application:

Create a blank window:
- Click in the quick access buttons.
- When the new element window appears, click "Window" then "Window".
- In the wizard, select "Blank".
In this new window:
- Create a Camera field named "CAM_Camera": under the "Creation" pane, in the "Graphic controls" group, scroll down to "Video and capture" and click on "Camera"..
  Note: By default, the camera associated with this field will be the default camera for the current workstation.
- Create a Button field named "BTN_Filmer": under the "Creation" pane, in the "Usual controls" group, click on "Button"..
  This Button control will be used to display the video sequence in the Camera control.
- Create a Button field named "BTN_Configuration": under the "Creation" pane, in the "Usual controls" group, click on "Button"..
  This Button control will be used to modify the configuration of the driver for video capture.
- Create a Button field named "BTN_Image": under the "Creation" pane, in the "Usual controls" group, click on "Button"..
  This Button control will be used to save the video sequence currently transmitted, as an image (BMP file).
- Create a Button field named "BTN_Video": under the "Creation" pane, in the "Usual controls" group, click on "Button"..
  This Button control will be used to save the video sequence currently transmitted, as a video sequence (AVI file).
- Create a Button field named "BTN_Stop": under the "Creation" pane, in the "Usual controls" group, click on "Button"..
  This Button control will be used to stop displaying and/or saving the video sequence in the Camera control.

Write the following code in the "Click" event of "BTN_Film":

// Affiche la séquence vidéo actuellement retransmise dans le champ "CAM_Caméra"
ResAffiche is boolean
ResAffiche = VideoDisplay(CAM_Caméra)
// Affiche une erreur en cas de problème
IF ResAffiche = False THEN Error(ErrorInfo())

Write the following code in the "Click" event of "BTN_Configuration":

// Affiche la boîte de dialogue standard permettant 
// la configuration du driver de capture vidéo utilisé pour le champ "CAM_Caméra"
VideoConfigure(CAM_Caméra)

Write the following code in the "Click" event of "BTN_Image":

// Sauvegarde de l'image actuellement retransmise dans le champ "CAM_Caméra"
ResSauvImg is boolean
ResSauvImg = VideoCapture(CAM_Caméra, "Temp.gif", viPictureCapture)
IF ResSauvImg = False THEN 
	Error(ErrorInfo())
END

// Sélection du fichier à créer
FichierImage is string 
FichierImage = fSelect(fExeDir(), "Image", ...
	"Enregistrer sous...", "BMP" + TAB + "*.BMP", "bmp", fselCreate + fselExist)

// Renomme le fichier BMP créé
IF FichierImage ~= "" THEN
	// Suppression du fichier temporaire
	fDelete("Temp.BMP")
ELSE
	// Renomme et déplace le fichier généré
	fRename("Temp.BMP", FichierImage)
END

Write the following code in the "Click" event of "BTN_Video":

// Sauvegarde de la séquence vidéo actuellement retransmise 
// dans le champ "CAM_Caméra" sous forme d'une AVI de 3 minutes
ResSauvVidéo is boolean
ResSauvVidéo = VideoCapture(CAM_Caméra, "Temp.avi", viVideoCapture, 180)
IF ResSauvVidéo = False THEN 
	Error(ErrorInfo())
END

// Sélection du fichier à créer
FichierVidéo is string = fSélecteur(fExeDir(), "Vidéo", ...
	"Enregistrer sous...", "AVI" + TAB + "*.avi", "avi", fselCreate + fselExist)

// Renomme le fichier AVI créé
IF FichierVidéo ~= "" THEN
	// Suppression du fichier temporaire
	fDelete("Temp.avi")
ELSE
	// Renomme et déplace le fichier généré
	fRename("Temp.avi", FichierImage)
END

Write the following code in the "Click" event of "BTN_Stop":

// Affiche l'affichage ou la sauvegarde de la séquence vidéo
ResArrête is boolean 
ResArrête = VideoStop(CAM_Caméra)
// Affiche une erreur en cas de problème
IF ResArrête = False THEN Error(ErrorInfo())