Properties of a video

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Weia Reinboud
Weia Reinboud 2019-1-14
评论： Weia Reinboud 2019-1-14
See attached picture. Several issues.
1:The video is OK but as you see numbers along the axes are not included. How to fix that? Or how to remove all?
2: The grid is different along all three axes, why?
3: Documentation of VideoWriter writes about many properties of a videoclip, like FrameRate. Where in the code this can be used?
axis([-3 3 -2 2 0 3.5]);
axis equal
grid on
%rest of code not shown
testfilm=VideoWriter('eerstefilm.avi');
open(testfilm);
writeVideo(testfilm,film);
close(testfilm);
Screen Shot 2019-01-14 at 12.26.05.png

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采纳的回答

Guillaume
Guillaume 2019-1-14
Documentation of VideoWriter writes about many properties of a videoclip, like FrameRate. Where in the code this can be used?
Normally, before you open the video.
As for your other questions, it all depends on what film is. I would guess that it may be the result of getframe but you haven't shown that bit.
  2 个评论
Weia Reinboud
Weia Reinboud 2019-1-14
"Normally, before you open the video." In the Command screen? Somewhere in the code?
The videoclip is fine, and indeed made with getframe
Guillaume
Guillaume 2019-1-14
In the Command screen? Somewhere in the code?
It's up to you. If the code you show is in a script, then in that script. E.g. if you wanted to set the frame rate you'd replace:
testfilm=VideoWriter('eerstefilm.avi');
open(testfilm);
by
testfilm=VideoWriter('eerstefilm.avi');
testfilm.FrameRate = 30; %must be before the call to open
open(testfilm);

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更多回答（2 个）

Weia Reinboud
Weia Reinboud 2019-1-14
Clear, thanks.
Weia Reinboud
Weia Reinboud 2019-1-14
I want to set the gridlines of a grid. Mathlab chooses 'nice' limits, but I want to do it myself. I cannot find where. Documentation text:
"axis AUTO returns the axis scaling to its default, automatic
mode where, for each dimension, 'nice' limits are chosen based
on the extents of all line, surface, patch, and image children."
This is the code at the moment:
axis([-3 3 -2 2 0 3.5]);
axis equal
grid on
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Weia Reinboud
Weia Reinboud 2019-1-14
I get this error message, maybe forgot something:
Undefined function 'xticks' for input arguments of type 'double'.

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