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1. #Download he aac v2 sample file mp4
2. #Download he aac v2 sample file software
3. #Download he aac v2 sample file download

#Download he aac v2 sample file software

Software Quality Standard: A report on the level of MISRA-C compliance for this module is available upon request.Error Codes: Reports up to 9 unique error codes, such as input buffer underflow and non-supported streams.Extended Test Vector Testing: Compliant with ISO/IEC test vectors and additional test vectors with unusual content.Fast Forward / Rewind: Resynchronization function provided to allow the user to seek to and continue playback from random access points.Output Status: Sample rate, number of output channels, etc.

#Download he aac v2 sample file mp4

The value of audioObjectType as defined in AudioSpecificConfig() must be 2, indicating AAC-LC. It is more than 2 bytes for HE-AAC with explicit signaling of SBR/PS. The length of the AudioSpecificConfig() data is 2 bytes for AAC-LC or HE-AAC with implicit signaling of SBR/PS. This data must appear otherwise, the decoder will reject the media type.

#Download he aac v2 sample file download

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MEDIASUBTYPE_RAW_AAC1: Contains the AudioSpecificConfig() data. EZ CD Audio Converter converts audio files between 50+ formats including FLAC, MP3, AAC, HE-AAC (v2), xHE-AAC, M4A, and AAC.This is followed by the AudioSpecificConfig() data, as defined by ISO/IEC 14496-3. MFAudioFormat_AAC: Contains the portion of the HEAACWAVEINFO structure that appears after the WAVEFORMATEX structure (that is, after the wfx member).The value of this attribute depends on the subtype. The interpretation of this value depends on the media subtype, as described previously. Number of channels, including the low frequency (LFE) channel, if present. For more information, see Format Constraints. Specifies the assignment of audio channels to speaker positions. If this attribute is not specified, the default value 0 is used, which specifies the stream contains raw_data_block elements only.ĭesired bit depth of the decoded PCM audio. The multiplex layer is AudioMu圎lement, restricted to one audio program and one layer. Of the three types of LOAS, only AudioSyncStream is supported. 3: Audio transport stream with a synchronization layer (LOAS) and a multiplex layer (LATM).Only one raw_data_block() per adts_frame() is allowed.

The stream contains an adts_sequence(), as defined by MPEG-2. The stream contains raw_data_block() elements only, as defined by MPEG-2. The decoder supports the following payload types: If unknown, set to zero or 0xFE ('no audio profile specified').Īpplies only to MFAudioFormat_AAC. The value of this attribute is the audioProfileLevelIndication field, as defined by ISO/IEC 14496-3. Refer to the previous description for details. HE-AACv2 - the output WAV file contains 7105 samples of lead-in where 7106 samples are expected.To configure the AAC decoder, set the following attributes on the input media type. Being off by 1 at 48kHz (not a multiple of 2) suggests the off-by-one error may be on the decoder side. HE-AACv1 - the output WAV file contains 5057 samples of lead-in where 5058 samples are expected. The HE-AAC values being a multiple of 2 at 48kHz makes sense as the underlying LC data will be 24kHz.ģ) Use ffmpeg to decode the ".aac" sample files to WAV and compare the time-alignment of the resulting WAV file with the original WAV file.ĪAC-LC - the output WAV file contains exactly 2048 samples of lead-in as expected. The deubg_ts information reports an initial timestamp of -2048 samples for AAC-LC, -5058 samples for HE-AACv1. Minor quirk - ffmpeg appears to decode HE-AACv1/v2 samples shifted in time (early) by 1 sample time at 48kHz.Ģ) Use ffmpeg+libfdk_aac to encode the WAV file into AAC-LC, HE-AACv1, and HE-AACv2 ".aac" sample files (48kHz) with the -debug_ts option.