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Starts the preview.

Component Version macOS Windows Linux Server iOS SDK
AVRecorder 6.1 ✅ Yes ✅ Yes ❌ No ❌ No ✅ Yes
MBS( "AVRecorder.StartPreview"; AVSession )   More


Parameter Description Example
AVSession The ID for the AVRecorder session as returned by AVRecorder.Init. $AVSession


Returns OK or error.


Starts the preview.


Start preview:

Set Variable [$r; Value:MBS("AVRecorder.AddPreviewToWindow"; $Session; Get(WindowName); 50; 200; 320; 240)]
Set Variable [$r; Value:MBS("AVRecorder.StartPreview"; $Session)]

Add preview to our layout:

# go to the right layout
Go to Layout [ “Webcam” (LiveStream) ; Animation: None ]
New Record/Request
# pause to actually show the new layout
Pause/Resume Script [ Duration (seconds): ,3 ]
# place preview on the control
Set Variable [ $r ; Value: MBS( "AVRecorder.AddPreviewWithControl"; $$SessionID; 0; "Preview" ) ]
# Start video stream
Set Variable [ $r ; Value: MBS( "AVRecorder.StartPreview"; $$sessionID ) ]

See also

Release notes

Example Databases

Blog Entries

This function checks for a license.

Created 18th February 2016, last changed 24th February 2022

AVRecorder.ShowPropertyDialog - AVRecorder.StartQRCodeDetection