Extbrc option is broken in this driver and the previous 3464, is this intended?
These drivers default to the new API 1.8 usage. Are you initializing the session with API 1.7 to get 1.7 behavior?
Sorry to ask before checking it myself. I'll see what I can find out.
No, this is initialised with API 1.8 using QSTranscode and Handbrake.
There is no documented/supported use of ExtBRC for API 1.8. If API 1.8 is being used and newer MFX_RATECONTROL_* algorithms are desired, the new APIs should be used.