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Avi export - set time/speed

Michael Steffen
Posted 11 years ago
POSTED BY: Michael Steffen
13 Replies
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Michael Steffen
Michael Steffen
Posted 10 years ago

This was irritating me, too - but simply set step to negative did not came to my mind....works like a charm now, many thanks! Hours of playing around, and a simple - solves it :D
POSTED BY: Michael Steffen
Michael Steffen
Michael Steffen
Posted 10 years ago

And how can I create a list of frames (or better: export to .avi) this one here:

Animate[Graphics[{White, 
Line[Table[{-.98^n*Sin[n*Pi/2], .98^n*Cos[n*Pi/2]}, {n, 0,  1000}]]}, PlotRange -> p, ImageSize -> {1280, 720}, 
Background -> Black], {p, .39, .37, .01}]

The easiest looking one but I do not get it...

Export[NotebookDirectory[] <> "The-Light.avi",  Table[Graphics[{White, 
Line[Table[{-.98^n*Sin[n*Pi/2], .98^n*Cos[n*Pi/2]}, {n, 0, 1000}]]}, PlotRange -> p, ImageSize -> {640, 360},Background -> Black], {p, .39, .37, .01}]]

does not work, same as my playarounds with ListAnimate....anyone a little hint for me how to create an avi from this?
POSTED BY: Michael Steffen

Hi Michael,

the problem simply seems to be that you are exporting an empty list:

Table[someFunction[p], {p, .39, .37, .01}]

You can not go from .39 to .37 with a positive stepsize .01; is must read:

Table[someFunction[p], {p, .39, .37, -.01}]

Animate and Manipulate are more tolerant in this respect, but not Table.

Regards -- Henrik
POSTED BY: Henrik Schachner
Michael Steffen
Michael Steffen
Posted 11 years ago

Solved - I exchanged every '80' with 160, the 160 in the export-function with 320 (2 'rounds') - and now I have what I wanted - 12 seconds slow running, 300 frames, and it works.

(There is maybe another little flaw with line-length of the boxes, not sure, I need to watch it on pc first and try around a bit - but when I understand 'the way' I'll for sure get the rest perfect, too. (-> if line-length is really damaged, the reason could only be one of the 80/160-values))
POSTED BY: Michael Steffen
Michael Steffen
Michael Steffen
Posted 11 years ago

No, as I do not really understand what happens there exactly for now. I found some animations and thought it maybe is possible to do some videos of them on the quick...seems it is not as easy as I have imagined^^
POSTED BY: Michael Steffen

I thought your parameter t in CubeTrail was only in the rotation, but it also appears in the choice of vertices. Can you unlink the two meanings?
POSTED BY: Gianluca Gorni
Michael Steffen
Michael Steffen
Posted 11 years ago

Doublepost
POSTED BY: Michael Steffen
Michael Steffen
Michael Steffen
Posted 11 years ago
POSTED BY: Michael Steffen
Michael Steffen
Michael Steffen
Posted 11 years ago
POSTED BY: Michael Steffen
POSTED BY: Gianluca Gorni
Michael Steffen
Michael Steffen
Posted 11 years ago
POSTED BY: Michael Steffen
Michael Steffen
Michael Steffen
Posted 11 years ago
POSTED BY: Michael Steffen
David Keith
David Keith
Posted 11 years ago

In ParallelTable you generate 80 frames, then you are exporting at 900 frames per second. However, the corrected code below produces a really cool 36 second movie!

Export[NotebookDirectory[] <> "movie2.avi", 
 ParallelTable[CubeTrail[4, 8, 3.8, .75, n], {n, 1, 900}], 
 "FrameRate" -> 25, "VideoEncoding" -> Uncompressed]
POSTED BY: David Keith
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