The Helix Producer 9.2 June 4th *) build includes an EHQ mode that I am happy with. You can get it here: https://distribution.helixcommunity...st?folderID=130 Remember that after signing up, you have to agree to the RPSL (or RCSL) license and also the Binary EULA before you can download it.
*) please delete ralf.dll from the codecs folder in this build, since it causes problems for rmeditor.
In many cases a quality improvement corresponding to a 30% bitrate reduction can be seen compared with standard RV9, and this is with a fully backwards compatible bitstream.
As you may know, PSNR measurements are the most commonly used indication of compression efficiency for video codecs. Compared with for instance VSS H.264 codec in its best quality mode, RV9-EHQ has higher compression efficiency, and encodes 25X faster.
encoderComplexity sets the EHQ level: 65 = Default : improved efficiency for high action 70 = High : same as 65 + better mode decisions, better representation of high motion 80 = Extra High: same as 70 + best possible mode decisions, very high accuracy motion representation 50 = Fast : not recommended, use only for Live capture encoding