Did you disable 'NVEnc->Misc->Key frames for chapter' ? (option is on by default and if you disable it you won't get the key frames where you want,..)
When enabled the NVEncC-call should contain '--keyfile GENERATED_KEY_FILE', it doesn't in your call.
Cu Selur
When enabled the NVEncC-call should contain '--keyfile GENERATED_KEY_FILE', it doesn't in your call.
Cu Selur