FPS Image acquisition toolbox

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VaL V6
VaL V6 2019-4-3
Hello,
I'm using the image acquisition toolbox to acquire video from a PAL camera. I'm absolutely sure that the sensor has 25 fps (VLC also confirmed) but when I start the video preview the FPS is stationary around a value of 12.5, as it acquires one frame every two.
I tried using:
% Access an image acquisition device.
vidobj = videoinput('winvideo', 1);
% Configure the number of frames to log.
vidobj.FramesPerTrigger = 50;
% Skip the first few frames the device provides
% before logging data.
vidobj.TriggerFrameDelay = 5;
% Access the device's video source.
src = getselectedsource(vidobj);
% Determine the device specific frame rates (frames per second) available.
frameRates = set(src, 'FrameRate')
but the frame-rate property is not supported.
How can i fix this?
Thank you in advance.

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