Look for the original post on doom9 here

Originally Posted by hank315 in doom9 post
A beta of HCenc 024 can be downloaded here

For now it's the encoder only so you have to edit the hc.ini file manually.
New features:

*1PASS
This command enables 1 pass VBR encoding.
1 pass can be used for clips > 1000 frames, smaller clips are done using 2 pass.

*CHROMAFORMAT 420
*CHROMAFORMAT 422
Output can be 420 (default) or 422 color space,
for 422 color space YUY2 input is required, for 420 input can be YV12 or YUY2

*INTRAVLC 0
*INTRAVLC 1
Chooses the VLC table for intra blocks: 0 = table14, 1 = table15. (non-intra blocks are always table14)
Default is *INTRAVLC 0.
In general *INTRAVLC 0 is better for low bitrates, *INTRAVLC 1 for high bitrates.


Notes:
- The 1 pass is really *very* beta.
- HCenc now accepts YUY2 input, for 420 output the chroma is sub-sampled progressively, in the final release it can also be done interlaced.
- Some bugs are solved, probably some new introduced...

Many thanks to manolito and Darksoul71 for the 1 pass code discussion/testing

Right now there is no new gui so you will have to use this via the command line.
Let's help hank test this and report any bugs that may be found.