134c134,136
< * filter chain when encoding.
---
> * filter chain when encoding. If an error occurs,
> * for example due to unsupported filter chain,
> * UINT64_MAX is returned.
151c153,155
< * filter chain when decoding.
---
> * filter chain when decoding. If an error occurs,
> * for example due to unsupported filter chain,
> * UINT64_MAX is returned.