Error code -8972 means “Codec condition error.” This means that SheerVideo cannot encode or decode the data as requested. The most common cause of a -8972 error is asking a Sheer codec to perfectly encode data which cannot possibly be encoded perfectly, because the specific Sheer codec has a lower precision or different chroma sampling scheme. For example, when outputting an Adobe After Effects Pro 16-bit project, the Sheer RGB[A] 10bf codec cannot store the lower 6 bits, so you must set ‘Pixel Format Conversion’ to ‘Best’, instead of ‘Perfect’ in the Sheer Settings dialog box.