Error code -8969 means “Codec bad data error.” This means that, in a Sheer codec’s self-check mode, the reconstituted image does not exactly match the original image. A -8969 error occurs when a Sheer codec is asked to self-check the encoding of data which cannot possibly be encoded perfectly, because the specific Sheer codec has a lower precision or different chroma sampling scheme than the input data. For example, since Adobe After Effects Pro always works in RGB[A], if you try to export from an 8-bit AE project to Sheer Y’CbCr 10bv 4:2:2[:4] with the Self-Check Sheer Setting turned on, the Sheer Y’CbCr 10bv 4:2:2[:4] codec will issue a -8978 error, warning you that a 4:2:2[:4] codec cannot losslessly encode RGB[A], which is always 4:4:4[:4], because 4:2:2[:4] formats only store half the chroma information. To encode to a Sheer codec with lower precision or different chroma-sampling, you must turn off ‘Self-Check’ mode in the Sheer Settings dialog box.