@PluginStudent said in how can I convert a c4d file to fbx format:

You could write a standalone C++ application that uses the Cineware SDK and the FBX SDK.

you said "You could write a standalone C++ application that uses the Cineware SDK and the FBX SDK."

this is I want to do.
but is there a free and legal way to get fbx sdk.
only cineware sdk cannot complete the task.

I have not c4d software.
https://developers.maxon.net/docs/Cinema4DCPPSDK/html/index.html

@m_adam
so what you mean is I can't convert a c4d file to fbx without a Cinema 4D sofware installed ?

c++ SDK or python SDK just work with running Cinema 4D, sdk do not work alone.

I haven't Cinema 4D, and I want convert some c4d files to fbx. There ary some other ways?

thanks for answer.
there are 2 quesions.

1 . if i use python sdk. where can I download it.
In https://developers.maxon.net/?page_id=1118
there is not free python sdk.
I notice that: "c4dpy does work only with commercial licenses"

2 . I can download c++ sdk. I am c++ programmer.
I do it according to https://medium.com/@antoinefortin_64750/how-to-setup-cinema4d-and-melange-c-sdk-924110725c01

env:
vs2019
22.004_RBCinewaresdk22.0_317036

but i encounter compile problems.

I add include lines as below

#include "c4d_file.h"
#include "default_alien_overloads.h"

then, there ars many errors likes that:

C2065 'objectToDelete': undeclared identifier use_r22 ...\includes\private_ge_mtools.h 633
see reference to class template instantiation 'cineware::GeTempDynArray<TYPE>' being compiled use_r22 ...\includes\private_ge_mtools.h 687
C3861 'objectToDelete': identifier not found use_r22 C:\Users\boluo\3D Objects\cineware\r22\includes\private_ge_mtools.h 633

I have add include directives and libs config

I think i missed something or , there is confiure error.
I tried different version vs and different version c4d lib, and I tried c++ 14. But these errors still exist.

using sdk or cineware.
or use python, but how cat I get python sdk .