Using Image Acquisition Toolbox and Parallel processing Toolbox to display and Record a video.

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I am trying to use the image acquistion toolbox and the parallel processing toolbox to display and record a video.
Basically, I have a big while loop that is reading a serial port and performing lots of computations. When a keyword comes across the port, this starts the video recording and another ends it.
I would basically like to use the parallel processing toolbox so that the displayed image is less framey (the recorded image is actually perfect for non-parallel).
I don't have much experience with these toolbox's as its on the work license, not my personal license.
I have attached a small example of how I thought this would work. The recorded video is there in its entirety but I can't get the preview to display. Is there a technique that I am unaware of or is it fundamentally not possible?
objects = imaqfind;
delete(objects);
imaqreset;
deviceInfo = imaqhwinfo('winvideo');
poolobj = parpool(1);
spmd(1)
vid = videoinput('winvideo', 1, 'MJPG_640x480');
vid.ReturnedColorspace = 'rgb';
triggerconfig(vid, 'immediate');
src = getselectedsource(vid);
frameRatesAvailable = set(src, 'FrameRate');
vid.FramesPerTrigger = Inf;
vid.TriggerRepeat = Inf;
vid.LoggingMode = 'disk';
VideoDir = ""; % Directory of interest
diskLogger = VideoWriter(VideoDir + "\TEST" + ".avi", 'Motion JPEG AVI');
diskLogger.FrameRate = 30; % Webcam is locked at 30 fps it appears - see variable frameRatesAvailable
vid.DiskLogger = diskLogger;
end
% While Loop Begins
TriggerWord = "preview"; % Serial Read
pause(2)
if TriggerWord == "preview"
spmd(1)
disp("Preview Run")
preview(vid);
end
end
pause(2);
TriggerWord = "start";% Serial Read
if TriggerWord == "start"
spmd(1)
disp("Start Run")
start(vid);
end
end
pause(2);
TriggerWord = "stop";% Serial Read
if TriggerWord == "stop"
spmd(1)
disp("Stop Run")
stop(vid);
end
end
pause(2);
TriggerWord = "closepreview";% Serial Read
if TriggerWord == "closepreview"
spmd(1)
disp("Close Preview Run")
closepreview(vid);
end
end
% While Loop Ends
delete(poolobj)
  2 Comments
Cillian Hayde
Cillian Hayde on 14 Dec 2021
@Raymond Norris, Thank you for your reply and introducing me to the concept of a headless worker!
It appears I can't mark your comment as resolving my issue even though I feel it has (The forum doesn't allow it).
Thank you for your time!

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