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HEAACWAVEINFO (mmreg.h) - Win32 apps | Microsoft …
https://docs.microsoft.com/en-us/windows/win32/api/mmreg/ns-mmreg-heaacwaveinfo
The data that follows the HEAACWAVEINFO structure contains the value of AudioSpecificConfig(), as defined by ISO/IEC 14496-3. The size of the data is wfx.cbSize - sizeof(HEAACWAVEINFO) + sizeof(WAVEFORMATEX). If the size is greater than zero, you can access the data by casting the HEAACWAVEINFO structure to a HEAACWAVEFORMAT structure.
#2883 (avi+aac - AudioSpecificConfig missing) – FFmpeg
https://trac.ffmpeg.org/ticket/2883
1) cbSize is set to zero in the WAVEFORMATEX structure. 2) AudioSpecificConfig is missing. ffmpeg -i h264.avi -i SurroundTest20.aac -c copy SurroundTest20.avi. Since wFormatTag = WAVE_FORMAT_RAW_AAC1, cbSize should be two (and five for SBR?) and AudioSpecificConfig should be filled (with cbSize its size): http://msdn.microsoft.com/en …
AAC Multichannel Playback Test - Fraunhofer
https://www2.iis.fraunhofer.de/AAC/multichannel.html
This channel configuration value is specified in the AudioSpecificConfig structure of the AAC bitstream. When the channel configuration value is set to 0, the channel configuration is not predefined, but is explicitly described in the Program Config Element structure. This allows arbitrary channel configurations to be used.
FFmpeg: MPEG4AudioConfig Struct Reference
https://www.ffmpeg.org/doxygen/0.6/structMPEG4AudioConfig.html
int MPEG4AudioConfig::sbr. Definition at line 34 of file mpeg4audio.h. Referenced by aac_decode_frame (), apply_independent_coupling (), decode_audio_specific_config (), decode_extension_payload (), ff_mpeg4audio_get_config (), parse_adts_frame_header (), and spectral_to_sample (). The documentation for this struct was generated from the ...
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