1MP4(3)                      MP4 File Format Library                     MP4(3)
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NAME

6       MP4GetTrackAudioMpeg4Type  -  Get  the encoding type of an MPEG-4 audio
7       track
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SYNTAX

10       #include <mp4.h>
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12       u_int8_t MP4GetTrackAudioMpeg4Type(
13            MP4FileHandle hFile,
14            MP4TrackId trackId
15       )
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ARGUMENTS

18       hFile  Specifies the mp4 file to which the operation applies.
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20       trackId
21              Specifies the track for which the MPEG-4 audio type is desired.
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RETURN VALUES

24       Upon  success,  the  MPEG-4  audio  type  of  the  track.  Upon  error,
25       MP4_MPEG4_INVALID_AUDIO_TYPE is returned.
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DESCRIPTION

28       MP4GetTrackAudioMpeg4Type returns the MPEG-4 encoding type of the spec‐
29       ified MPEG-4 audio track in the mp4 file. If an  mp4  audio  track  has
30       type  MP4_MPEG4_AUDIO_TYPE,  this  call  can be used to determine which
31       specific MPEG-4 audio encoding is contained in the track.  (Note:  This
32       information is retrieved from the audio track ES configuration.)
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34       Known audio encoding types are:
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36       MP4_MPEG4_AAC_MAIN_AUDIO_TYPE
37            MPEG-4 AAC Main profile
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39       MP4_MPEG4_AAC_LC_AUDIO_TYPE
40            MPEG-4 AAC Low Complexity profile
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42       MP4_MPEG4_AAC_SSR_AUDIO_TYPE
43            MPEG-4 AAC SSR profile
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45       MP4_MPEG4_AAC_LTP_AUDIO_TYPE
46            MPEG-4 AAC Long Term Prediction profile
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48       MP4_MPEG4_AAC_SCALABLE_AUDIO_TYPE
49            MPEG-4 AAC Scalable
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51       MP4_MPEG4_CELP_AUDIO_TYPE
52            MPEG-4 CELP
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54       MP4_MPEG4_HVXC_AUDIO_TYPE
55            MPEG-4 HVXC
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57       MP4_MPEG4_TTSI_AUDIO_TYPE
58            MPEG-4 Text To Speech
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60       MP4_MPEG4_MAIN_SYNTHETIC_AUDIO_TYPE
61            MPEG-4 Main Synthetic profile
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63       MP4_MPEG4_WAVETABLE_AUDIO_TYPE
64            MPEG-4 Wavetable Synthesis profile
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66       MP4_MPEG4_MIDI_AUDIO_TYPE
67            MPEG-4 MIDI profile
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69       MP4_MPEG4_ALGORITHMIC_FX_AUDIO_TYPE
70            MPEG-4 Algorithmic Synthesis and Audio FX profile
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SEE ALSO

74       MP4(3) MP4GetTrackAudioType(3)
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78Cisco Systems Inc.                Version 0.9                           MP4(3)
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