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how to create a software-based audio converter in Wowza GoCoderSDk

WowzaGoCoderSDK: ERROR: AudioConverterFillComplexBuffer returned -50

WowzaGoCoderSDK: data size = 32768, no. of output packets = 0, time = 0

WowzaGoCoderSDK: WARNING: Audio conversion failed with hardware converter, trying with software converter.

WowzaGoCoderSDK: ERROR: AudioConverterNewSpecific returned -50 attempting to create a software-based audio converter

WowzaGoCoderSDK: Software encoder PCM input format:

Sample Rate:0

Format ID:

Format Flags: 0

Bytes per Packet: 0

Frames per Packet:0

Bytes per Frame:0

Channels per Frame: 0

Bits per Channel: 0

WowzaGoCoderSDK: Software encoder AAC output format:

Sample Rate:0

Format ID: aac

Format Flags: 1

Bytes per Packet: 0

Frames per Packet: 1024

Bytes per Frame:0

Channels per Frame: 1

Bits per Channel: 0

kAudioFormatFlagIsFloat

kLinearPCMFormatFlagIsFloat

kLinearPCMFormatFlagsSampleFractionShift

kAppleLosslessFormatFlag_16BitSourceData

kAppleLosslessFormatFlag_24BitSourceData