MXF::TimedTextDescriptor* TDescObj = (MXF::TimedTextDescriptor*)m_EssenceDescriptor;
TDesc.EditRate = TDescObj->SampleRate;
- TDesc.ContainerDuration = TDescObj->ContainerDuration;
+ assert(TDescObj->ContainerDuration <= 0xFFFFFFFFL);
+ TDesc.ContainerDuration = (ui32_t) TDescObj->ContainerDuration;
memcpy(TDesc.AssetID, TDescObj->ResourceID.Value(), UUIDlen);
TDesc.NamespaceName = TDescObj->NamespaceURI;
TDesc.EncodingName = TDescObj->UCSEncoding;