Changing the speed of exported AVI videos

Question

I am exporting an animation created using Manipulate in the .avi format. However the video runs very fast (I am putting it in Keynote). Its speed seems independent of how small I choose the step in Manipulate. Is there a way to control how fast the .avi will run or some other way to show the animation slower?

If you post a working code snippet of what you are trying to export you will also probably get much better answers (see for example how this question was asked). — Ajasja, May 14 '12 at 19:36
In this related question, "Exporting Animations under Duration constraints to view on an iPad", some other export methods are discussed. — Jens, May 15 '12 at 02:17

Sjoerd C. de Vries · Answer 1 · 2012-05-14T20:11:39.160

29

The trick is using a combination of "FrameRate", an option of Export, and AutorunSequencing, an option of Manipulate. The former determines the number of frames/second of the movie whereas the latter determines how long a sweep of the control takes. With one control, that will be the length of the movie.

Export["output.avi", 
 Manipulate[
   Plot[Sin[k  x], {x, 0, 2 \[Pi]}], 
   {k, 1, 5}, 
   AutorunSequencing -> {{1, 10}}
 ], "FrameRate" -> 2
]

enter image description here

edited May 14 '12 at 20:11

answered May 14 '12 at 20:00

Sjoerd C. de Vries

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Actually the FrameRate will not control the speed of sliderbar's velocity.Just take frame form oringnal fast video. – yode Oct 15 '15 at 02:57
I don't think you read my post correctly. – Sjoerd C. de Vries Oct 15 '15 at 05:54
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What happens when I need FrameRate to be 0.5? To have a picture for 2seconds for example? I did not work for me. – Chen Stats Yu Aug 31 '18 at 02:28

score 9 · Answer 2 · edited Apr 13 '17 at 12:55

9

The option you need is "FrameRate". It's not even necessary to create a list of graphics objects first, as per Sjored's answer.

edited Apr 13 '17 at 12:55

Community

1

answered May 14 '12 at 19:21

Ajasja

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You can Export a Manipulate as movie without creating an array. Try Export["output.avi", Manipulate[Plot[Sin[k x], {x, 0, 2 \[Pi]}], {k, 1, 5}]] – Sjoerd C. de Vries May 14 '12 at 19:44
@SjoerdC.deVries: but you can't control the speed of the movie that way afaik. – Heike May 14 '12 at 19:46
@heike please see my answer – Sjoerd C. de Vries May 14 '12 at 20:06
@SjoerdC.deVries I stand corrected – Heike May 14 '12 at 20:21
@SjoerdC.deVries Me too:) – Ajasja May 14 '12 at 20:30

score 5 · Answer 3 · answered Oct 14 '15 at 14:29

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I've found that giving the option "AnimationDuration"-> (seconds) in the Export function gives better results generally.

answered Oct 14 '15 at 14:29

RationalAsh

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Please elaborate on your answer. For instance, in what sense does "AnimationDuration" give better results? – bbgodfrey Oct 14 '15 at 14:50
@bbgodfrey Rather than reducing the framerate, it gives a longer animation at the same framretae, making it smoother. – RationalAsh Oct 16 '15 at 08:38
I don't see this as an options at all – soandos Nov 24 '16 at 17:31

score 1 · Answer 4 · answered Mar 14 '22 at 13:10

1

You can use AnimationDuration to control this and a good FrameRate to make the transition smoother.

Export["output.avi", 
 Manipulate[Plot[Sin[k x], {x, 0, 2 \[Pi]}], {k, 1, 5}, 
  AutorunSequencing -> {{1, 10}}], "FrameRate" -> 25, 
 "AnimationDuration" -> 15]

Video in: Animation Video

answered Mar 14 '22 at 13:10

Héc JR

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Your answer could be improved with additional supporting information. Please [edit] to add further details, such as citations or documentation, so that others can confirm that your answer is correct. You can find more information on how to write good answers in the help center. – Community Mar 15 '22 at 01:52

Changing the speed of exported AVI videos

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