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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I think I had a similar problem, not the
size issue but the single, static image issue. Try calling Modified() on
vtkWindowToImageFilter before you call Update(). As for frame rate I don’t
know how to set that with vtk’s classes, I suggest you look at FFMPEG, it
can be built into VTK but I’ve had little luck doing so. Currently
I write out image files and have my application call the ffmpeg executable to
encode the images as a movie, using ffmpeg command line options you can control
framerate.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Beau<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> vtkusers-bounces+beau.sapach=ualberta.ca@vtk.org
[mailto:vtkusers-bounces+beau.sapach=ualberta.ca@vtk.org] <b><span
style='font-weight:bold'>On Behalf Of </span></b>Janny Dong<br>
<b><span style='font-weight:bold'>Sent:</span></b> Tuesday, May 29, 2007 8:24
AM<br>
<b><span style='font-weight:bold'>To:</span></b> vtkusers<br>
<b><span style='font-weight:bold'>Subject:</span></b> [vtkusers] How to write
AVI files properly, Please Help</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>I posted a similar
question but didn't get any answer, probably I didn't make it clear enough.<br>
<br>
I am coding a C++ program to visualize my data and generate movie
automatically. I put vtkAVIWriter in a loop to get a movie out of the rendering.
It did get an avi file, but not the one I expected. I have two questions about
it. <br>
<br>
(1) The size of the movie file is 18MB, but it has only 50 frames. Moreover, it
is only 3 second long. Can I compress the movie file with vtkAVIWriter? How can
I control the speed of the movie, like specifying number of frames per second? <br>
<br>
(2) I found the avi file displayed only one frame like a static image. However,
I did update the data when rendering each frame. The data rendering part in my
program is like<br>
data points--->vtkPolyData--->vtkDelaunay2D--->vktPolyDataMapper--->vtkRenderer--->vtkWin32OpenGLRenderWindow->SetOffScreenRendering(1)--->vtkWindowToImageFilter--->vtkAVIWriter
<br>
<br>
I have something like: PolyDataMapper->update(); WindowToImage->update()
in my code. Did I call update() in a wrong way or should I call it in
different parts of the code?<br>
<br>
Any suggestions will be greatly appreciated. <br>
<br>
Janny<br>
<o:p></o:p></span></font></p>
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