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<p class=MsoNormal><span style='color:#1F497D'>Thanks Brian,<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>I’ve switched to using
already-existing vtkimagedata objects from my application (medical images)
instead of taking a snapshot of the render window they’re in for each frame.
Now I’ve got a working mpeg file, turns out I didn’t really understand the
mpegwriter, and wasn’t doing any color-mapping of my input data. ANYway, capturing
the entire render window is next.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Another question though, is
there a way to specify the length (and inherently the timing) of the movie?
Thanks!<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Beau<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #91C0FF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:9.0pt;font-family:"Segoe UI","sans-serif"'>From:</span></b><span
style='font-size:9.0pt;font-family:"Segoe UI","sans-serif"'> Wylie, Brian
[mailto:bnwylie@sandia.gov] <br>
<b>Sent:</b> Monday, July 31, 2006 1:43 PM<br>
<b>To:</b> Beau Sapach; vtkusers@vtk.org<br>
<b>Subject:</b> RE: [vtkusers] vtkMPEG2Writer<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>In this case, unlike many others, the error messages are actually
giving you good information. :)</span><span style='font-size:12.0pt;font-family:
"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'> <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>The mpeg encoders have to have multiples of 2 or multiple of 4 in
the image size of the movies it generates.</span><span style='font-size:12.0pt;
font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'> <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>Grab the size of the render window with GetSize(), and then resize
the window (probably smaller) to the next multiple of 4 in both directions, I'm
assuming with SetSize(). Then it should work ok. :)</span><span
style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<div>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'> <o:p></o:p></span></p>
</div>
<p><span style='font-size:10.0pt;font-family:"Fixedsys","serif"'> Brian
Wylie - Org 1424<br>
Sandia National Laboratories<br>
MS 0822 - Building 880/A1-J<br>
(505)844-2238
FAX(505)845-0833 <br>
____
_ __<br>
/ __ \____ _________ | | / (_)__
_ __<br>
/ /_/ / __ `/ ___/ __ `/ | / / / _ \ | /| / /<br>
/ ____/ /_/ / / / /_/ /| |/ / / __/ |/ |/ /<br>
/_/ \__,_/_/ \__,_/
|___/_/\___/|__/|__/ <br>
Unleash the Beast</span><o:p></o:p></p>
<div>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'> <o:p></o:p></span></p>
</div>
<blockquote style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt;
margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p> </o:p></span></p>
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style='font-size:12.0pt;font-family:"Times New Roman","serif"'>
<hr size=2 width="100%" align=center>
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<p class=MsoNormal style='margin-bottom:12.0pt'><b><span style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> vtkusers-bounces+bnwylie=sandia.gov@vtk.org
[mailto:vtkusers-bounces+bnwylie=sandia.gov@vtk.org] <b>On Behalf Of </b>Beau
Sapach<br>
<b>Sent:</b> Monday, July 31, 2006 1:37 PM<br>
<b>To:</b> vtkusers@vtk.org<br>
<b>Subject:</b> [vtkusers] vtkMPEG2Writer</span><span style='font-size:12.0pt;
font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal>Hello everyone,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I’m trying to use vtkMPEG2Writer to capture the frames of a
render window into a movie but I keep getting these errors:<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Generic Warning: In \vtk-5.0.0\Io\vtkMPEG2Writer.cxx, line
61<o:p></o:p></p>
<p class=MsoNormal>horizontal_size must be a even [4:2:0/4:2:2]<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Generic Warning: In \vtk-5.0.0\Io\vtkMPEG2Writer.cxx, line
61<o:p></o:p></p>
<p class=MsoNormal>vertical_size must be a even [4:2:0]<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Generic Warning: In \vtk-5.0.0\Io\vtkMPEG2Writer.cxx, line
61<o:p></o:p></p>
<p class=MsoNormal>vertical _size must be a even [field pictures]<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Generic Warning: In \vtk-5.0.0\Io\vtkMPEG2Writer.cxx, line
61<o:p></o:p></p>
<p class=MsoNormal>vertical _size must be a multiple of 4 [4:2:0 field
pictures]<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Here is the code behind my Recorder object. This is
somewhat simplified so I’m sure if it were compiled would cause some problems,
I can already see one memory leak. Nonetheless, if anyone sees any
obvious problems with this, please let me know! The functions are called
in the order they are presented.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-family:"Courier New"'>void
Recorder::GrabFrame()<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Courier New"'>{<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>
vtkImageData * frame = vtkImageData::New();<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>
vtkUnsignedCharArray * pData = vtkUnsignedCharArray::New();<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>
vtkRenderWindow * rw = GetRenderWindow();<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>
<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>
int * dim = rw->GetSize();<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>
<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>
rw->GetRGBACharPixelData(1,1,dim[0]-1,dim[1]-1,1,pData);<span
style='color:green'><o:p></o:p></span></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>
frame->SetExtent(0,dim[0],0,dim[1],0,0);<span style='color:blue'><o:p></o:p></span></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>
frame->SetScalarTypeToUnsignedChar();<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>
frame->SetNumberOfScalarComponents(4);<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>
frame->GetPointData()->SetScalars(pData);<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>}<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>void
Recorder::WriteFrame()<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>{
<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>
vtkMPEG2Writer * mWriter = vtkMPEG2Writer::New();<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>
if(!started){<br>
mWriter->SetFileName(“d:\\testvideo.mpg”);<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>
mWriter->SetInput(frame);<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>
mWriter->Start();<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>
started = TRUE;<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>
}else{<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>
mWriter->SetInput(frame);<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>
mWriter->Write();<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>
}<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>}<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>void
Recorder::StopRecording()<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>{<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>
mWriter->End();<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>}<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoAutoSig>--<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p>
<p class=MsoAutoSig><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Network
Administrator<o:p></o:p></span></p>
<p class=MsoAutoSig><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>In-Vivo
NMR Centre<o:p></o:p></span></p>
<p class=MsoAutoSig><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>University
of Alberta<o:p></o:p></span></p>
<p class=MsoAutoSig><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Phone:
(780) 492-8098<o:p></o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
</blockquote>
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