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How to use previewFrameCount method in fMBT

Best Python code snippet using fMBT_python

teststeps.py

Source:teststeps.py

...10        os.remove(P['photo'])11    camera.capture(P)12    assert exists(P['photo']), "No file."13def iPreview():14    assert camera.previewFrameCount() == 015    assert camera.previewing() == False16    camera.startPreview(P)17    time.sleep(1)18    frames = camera.previewFrameCount()19    assert camera.previewing() == True20    camera.stopPreview()21    return frames22def iStartVideocapt():23    camera.startVideoCapture()24def iStopVideocapt():...

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