[vtkusers] Problems using more than one vtkMPEG2Writer simultaneously, only one creates a working MPEG

[Jefferson Thomas]

Thank you very much for your help.
No, Thomas Jefferson is not my real name :)
I have some problems with CVS downloading now (firewalls etc.) so I
can not check it right now but as soon as I do it I will post here if
it solved the case for me.
Have a nice day,
(not)Thomas Jefferson

2008/6/2 Mathieu Malaterre <mathieu.malaterre at gmail.com>:
> Hi Thomas Jefferson... is it your real name ?
>
>  I fixed a couple of uninitialized variables:
>
> $ cvs ci -m"BUG: fixed unitialized vars" vtkMPEG2Writer.cxx
> /cvsroot/VTK/VTK/IO/vtkMPEG2Writer.cxx,v  <--  vtkMPEG2Writer.cxx
> new revision: 1.7; previous revision: 1.6
>
>  Let me know if this works for you now.
>
> -Mathieu
>
> On Wed, May 28, 2008 at 11:13 AM, Jefferson Thomas <foramuyou at gmail.com> wrote:
>> Hi,
>> I want to use more then one vtkMPEG2Writer in the same time and output
>> many MPEG.
>> The problem is that every time I try to do it only one of the MPEG
>> files is working after that.
>> Here is a mininal code :
>>
>> #include "vtkMPEG2Writer.h"
>> #include "vtkWindowToImageFilter.h"
>> #include "vtkCylinderSource.h"
>> #include "vtkPolyDataMapper.h"
>> #include "vtkActor.h"
>> #include "vtkRenderer.h"
>> #include "vtkRenderWindow.h"
>> #include "vtkRenderWindowInteractor.h"
>> #include "vtkProperty.h"
>> #include "vtkCamera.h"
>>
>> int main(void) {
>>
>>        vtkCylinderSource *cylinder = vtkCylinderSource::New();
>>        cylinder->SetResolution(8);
>>
>>        vtkPolyDataMapper *cylinderMapper = vtkPolyDataMapper::New();
>>        cylinderMapper->SetInputConnection(cylinder->GetOutputPort());
>>
>>        vtkActor *cylinderActor = vtkActor::New();
>>        cylinderActor->SetMapper(cylinderMapper);
>>        cylinderActor->GetProperty()->SetColor(1.0000, 0.3882, 0.2784);
>>        cylinderActor->RotateX(30.0);
>>        cylinderActor->RotateY(-45.0);
>>
>>        vtkRenderer *renderer = vtkRenderer::New();
>>        renderer->AddActor(cylinderActor);
>>
>>        vtkRenderWindow *window = vtkRenderWindow::New();
>>        window->AddRenderer(renderer);
>>
>>        vtkWindowToImageFilter* w2if =vtkWindowToImageFilter::New();
>>        w2if->SetInput(window);
>>
>>        vtkMPEG2Writer *moviewriter1 = vtkMPEG2Writer::New();
>>        moviewriter1->SetFileName("test1.mpg");
>>        moviewriter1->SetInputConnection(w2if->GetOutputPort());
>>        moviewriter1->Start();
>>
>>        vtkMPEG2Writer *moviewriter2 = vtkMPEG2Writer::New();
>>        moviewriter2->SetFileName("test2.mpg");
>>        moviewriter2->SetInputConnection(w2if->GetOutputPort());
>>        moviewriter2->Start();
>>
>>        window->Render();
>>
>>        w2if->Modified();
>>        moviewriter1->Write();
>>        moviewriter2->Write();
>>
>>        moviewriter1->End();
>>        moviewriter2->End();
>> }
>>
>> Linking with : -lvtkRendering -lvtkjpeg -lvtkexpat -lvtkftgl
>> -lvtkfreetype -lGL -lGLw -lOSMesa -lpthread -ldl -lm -lvtkDICOMParser
>> -lvtkpng -lvtktiff -lvtkzlib -lvtkGraphics -lvtkImaging -lvtkIO
>> -lvtkFiltering -lvtkCommon -lvtksys -lvtkMPEG2Encode
>>
>> The output will be two mpeg files "test1.mpg" and "test2.mpg". But
>> only "test1.mpg" can be displayed ! What is strange is that they have
>> the same size and almost the same content. Only few bytes differ...
>> How can it be done properly, so that all the mpgs work after creation ?
>> Thomas
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>
>
>
> --
> Mathieu
>