MP4GetTrackAudioMpeg4Type - Man Page
Get the encoding type of an MPEG-4 audio track
Syntax
#include <mp4.h>
u_int8_t MP4GetTrackAudioMpeg4Type(
MP4FileHandle hFile,
MP4TrackId trackId
)
Arguments
- hFile
Specifies the mp4 file to which the operation applies.
- trackId
Specifies the track for which the MPEG-4 audio type is desired.
Return Values
Upon success, the MPEG-4 audio type of the track. Upon error, MP4_MPEG4_INVALID_AUDIO_TYPE is returned.
Description
MP4GetTrackAudioMpeg4Type returns the MPEG-4 encoding type of the specified MPEG-4 audio track in the mp4 file. If an mp4 audio track has type MP4_MPEG4_AUDIO_TYPE, this call can be used to determine which specific MPEG-4 audio encoding is contained in the track. (Note: This information is retrieved from the audio track ES configuration.)
Known audio encoding types are:
MP4_MPEG4_AAC_MAIN_AUDIO_TYPE
MPEG-4 AAC Main profile
MP4_MPEG4_AAC_LC_AUDIO_TYPE
MPEG-4 AAC Low Complexity profile
MP4_MPEG4_AAC_SSR_AUDIO_TYPE
MPEG-4 AAC SSR profile
MP4_MPEG4_AAC_LTP_AUDIO_TYPE
MPEG-4 AAC Long Term Prediction profile
MP4_MPEG4_AAC_SCALABLE_AUDIO_TYPE
MPEG-4 AAC Scalable
MP4_MPEG4_CELP_AUDIO_TYPE
MPEG-4 CELP
MP4_MPEG4_HVXC_AUDIO_TYPE
MPEG-4 HVXC
MP4_MPEG4_TTSI_AUDIO_TYPE
MPEG-4 Text To Speech
MP4_MPEG4_MAIN_SYNTHETIC_AUDIO_TYPE
MPEG-4 Main Synthetic profile
MP4_MPEG4_WAVETABLE_AUDIO_TYPE
MPEG-4 Wavetable Synthesis profile
MP4_MPEG4_MIDI_AUDIO_TYPE
MPEG-4 MIDI profile
MP4_MPEG4_ALGORITHMIC_FX_AUDIO_TYPE
MPEG-4 Algorithmic Synthesis and Audio FX profile