Set the mask in AE and use AEGP_GetLayerNumMasks to query the number of masks. The return value is 0

Question

Hello AllI have a question when using c++ to develop AE export plug-in,Set the mask in AE and use AEGP_GetLayerNumMasks to query the number of masks,The return value is 0,The specific code is as follows：AE Version: 2025System version: M3 Pro,macOS 15.3  A_long numMasks = 0;
  RECORD_ERROR(suites.MaskSuite6()->AEGP_GetLayerNumMasks(layerHandle, &numMasks));
  for (int i = 0; i < numMasks; i++) {
    AEGP_MaskRefH maskHandle;
    RECORD_ERROR(suites.MaskSuite6()->AEGP_GetLayerMaskByIndex(layerHandle, i, &maskHandle));
    auto mask = ExportMask(context, maskHandle);
    masks.push_back(mask);
    RECORD_ERROR(suites.MaskSuite6()->AEGP_DisposeMask(maskHandle));
  }Has anyone encountered similar problems?

shachar carmi · Accepted Answer

Hi,track masking requires two layers (the mask layer and the masked layer).Cannot set mask if there is only one layer

hold on... a track ammte and a mask are two different things...

1. track matte - one layer operating with the alpha/luma of the layer above it.

2. mask - a vector shape drawn on a layer with the pen tool.

if your situation is the same as #1, then the mask suite is the wrong way to go as there are no masks on that layer, and then getting 0 as the num_masks actually makes sense...

shachar carmi · Answer

the code looks ok. is the layer handle valid? does AEGP_GetLayerMaskByIndex return some error?

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