A BaseVideoPost object represents a video post effect in the render settings. Such a video post can be a simple filter or a complete render engine. Custom video posts can be created using the VideoPostData class.

BaseVideoPost objects are an instance of VPbase.

// This example searches for the "Watermark" post effect and enables it.
// If it does not exist, it is added.
const Int watermarkID = 1025462;
RenderData* const renderData = doc->GetActiveRenderData();
BaseVideoPost* videoPost = renderData->GetFirstVideoPost();
BaseVideoPost* watermark = nullptr;
// search for the "Watermark" video post
while (videoPost != nullptr)
// check if this is a "Watermark"
if (videoPost->GetType() == watermarkID)
watermark = videoPost;
videoPost = videoPost->GetNext();
// if not found, create the watermark
if (watermark == nullptr)
watermark = BaseVideoPost::Alloc(watermarkID);
if (watermark == nullptr)
return maxon::OutOfMemoryError(MAXON_SOURCE_LOCATION);
// enable
void DelBit(Int32 mask)
Definition: c4d_baselist.h:2258
Definition: c4d_videopost.h:24
static BaseVideoPost * Alloc(Int32 type)
BaseVideoPost * GetNext(void)
Definition: c4d_videopost.h:56
Int32 GetType() const
Definition: c4d_baselist.h:1393
Definition: c4d_basedocument.h:144
void InsertVideoPost(BaseVideoPost *pvp, BaseVideoPost *pred=nullptr)
BaseVideoPost * GetFirstVideoPost()
maxon::Int Int
Definition: ge_sys_math.h:64
Videopost is disabled.
Definition: ge_prepass.h:912
Definition: memoryallocationbase.h:67
const char * doc
Definition: pyerrors.h:226


BaseVideoPost elements are stored in an RenderData object:

See also RenderData Manual.


BaseVideoPost object are created with the usual tools:

Newly created BaseVideoPost objects can be added to the render settings by adding them to the RenderData object:

// This example adds the color correction video post to the current render settings.
RenderData* const renderData = doc->GetActiveRenderData();
if (renderData == nullptr)
return maxon::UnexpectedError(MAXON_SOURCE_LOCATION);
if (colorCorrection == nullptr)
return maxon::OutOfMemoryError(MAXON_SOURCE_LOCATION);
#define VPcolorcorrection
Color correction.
Definition: c4d_videopostdata.h:224


BaseVideoPost objects are organized in a list. This list can be navigated with:

// This example loops through all video posts and prints their names.
RenderData* const renderData = doc->GetActiveRenderData();
BaseVideoPost* videoPost = renderData->GetFirstVideoPost();
while (videoPost != nullptr)
ApplicationOutput("Video post name: " + videoPost->GetName());
videoPost = videoPost->GetNext();
String GetName() const
Definition: c4d_baselist.h:2363
#define ApplicationOutput(formatString,...)
Definition: debugdiagnostics.h:210


The parameters of a video post can be accessed through C4DAtom::GetParameter() and C4DAtom::SetParameter(). The IDs of these parameters are defined in the header file of the specific video post like vpxmbsampler.h, vppreviewhardware.h, vpwatermark.h etc.

Read-Only Properties

Not every video post can be combined with every render engine. It is needed to ask the BaseVideoPost object if it can be used with the given render engine.

// This example checks if the video post can be added to used render engine
RenderData* const renderData = doc->GetActiveRenderData();
// check render engine
BaseContainer& bc = renderData->GetDataInstanceRef();
const Int32 renderEngine = bc.GetInt32(RDATA_RENDERENGINE);
// create new video post
BaseVideoPost* watermark = BaseVideoPost::Alloc(1025462);
if (watermark == nullptr)
return maxon::OutOfMemoryError(MAXON_SOURCE_LOCATION);
// check if the video post is compatible with the given render engine
if (watermark->RenderEngineCheck(renderEngine))
// insert video post
// delete video post
ApplicationOutput("This video post cannot work with the current render engine.");
Definition: c4d_basecontainer.h:47
Int32 GetInt32(Int32 id, Int32 preset=0) const
Definition: c4d_basecontainer.h:303
const BaseContainer & GetDataInstanceRef() const
Definition: c4d_baselist.h:2344
Bool RenderEngineCheck(Int32 id)
static void Free(BaseVideoPost *&bl)
Definition: drendersettings.h:39
maxon::Int32 Int32
Definition: ge_sys_math.h:60


A video post could also handle stereoscopic related functionality. By default the only existing video post that does handle stereoscopic images is the stereo video post (ID 450000225). To check if a plugin video post handles stereo images check the flag PLUGINFLAG_VIDEOPOST_STEREO_RENDERING. The source and target bitmap data is stored as a BaseBitmap (see BaseBitmap Manual).

// This example merges the two given BaseBitmaps in the src array into a single anaglyph bitmap
AutoAlloc<BaseVideoPost> stereoVP { 450000225 };
if (stereoVP == nullptr)
return maxon::OutOfMemoryError(MAXON_SOURCE_LOCATION);
BaseContainer settings;
// merge bitmaps
if (stereoVP->StereoMergeImages(targetBitmap, src, 2, settings, COLORSPACETRANSFORMATION::NONE) == false)
return maxon::UnknownError(MAXON_SOURCE_LOCATION);
// show the result image
Bool ShowBitmap(const Filename &fn)
Definition: ge_autoptr.h:37
void SetInt32(Int32 id, Int32 l)
Definition: c4d_basecontainer.h:505
PyObject * src
Definition: abstract.h:305
Definition: drendersettings.h:433
Definition: drendersettings.h:432

See also CameraObject Manual.


If a videopost is enabed or not is controlled with a bit:

// This example disables the first video post.
RenderData* const rd = doc->GetActiveRenderData();
if (rd == nullptr)
return maxon::UnexpectedError(MAXON_SOURCE_LOCATION);
BaseVideoPost* const vp = rd->GetFirstVideoPost();
if (vp != nullptr)
void SetBit(Int32 mask)
Definition: c4d_baselist.h:2245

Further Reading