pub(crate) fn held_key_retry(crf: u32, len: usize, cap: usize) -> Option<u32>Expand description
The quality index a held key frame of len bytes is coded again at, from crf, where it
came out larger than a budget of cap bytes; None where it fits. A quality index is a
quantizer on the H.26x scale, where six steps halve the bits.