AacEncodeConfiguration AudioEncode Field Type Repeated Description sample_rate SampleRate profile AacEncodeConfiguration.AacProfile encapsulation AacEncodeConfiguration.AacEncapsulation bitrate_mode AacEncodeConfiguration.AacBitrateMode afterburner OptionalBool FDK’s higher-quality encode pass. Enabled by default; small CPU cost. Member of Message Description AudioEncodeConfiguration WriteFile AdMarker