How can I do a frame-capture style video recording in "Simulink 3D Animation" using matlab?
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I'm trying to create video recording of a complicated (30+ nodes) system in "Simulink 3D Animation" that is driven by a matlab script (I don't have simulink). The system is complex enough that I can't simply use the video recording functionality that records what is displayed in the animation viewer because it is too slow and choppy.
Instead, I would prefer to approach the problem similarly to animations in standard matlab plots, in which I use "gcf" to capture the frame, and then when I use "movie2avi" I can dictate the frame rate, such that no matter how long my simulation takes to run each loop, I get an output video with the correct fps.
Alternatively, I'm open to any solution that allows a deterministic selection of frame rate that is not dependent on how fast the computer is able to churn through the model.
Antworten (2)
Jan Houska
am 10 Apr. 2014
To get a single static screenshot of the current Simulink 3D Animation figure, please do
y = capture(vrgcf);
Then, you should be able to create the video stream by using selected screenshots, as needed.
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Jan
am 15 Apr. 2014
Hi Nathan,
The error message "Subscripted assignment dimension mismatch." comes from the different matrix sizes during the assignment - with (i) subscript the M matrix doesn't get expanded to the assumed size (x,y,i)..
Instead of arranging the matrix M I suggest you to use the VideoWriter object, where you can easily add frames by code like this:
writeVideo(rec_obj, capture(vrgcf))
Best Regards,
Jan
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