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

6       MP4GetTrackAudioType - Get the encoding type of an audio track
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SYNTAX

9       #include <mp4.h>
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11       u_int8_t MP4GetTrackAudioType(
12            MP4FileHandle hFile,
13            MP4TrackId trackId
14       )
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ARGUMENTS

17       hFile  Specifies the mp4 file to which the operation applies.
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19       trackId
20              Specifies the track for which the audio type is desired.
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RETURN VALUES

23       Upon   success,   the   audio   type   of   the   track.   Upon  error,
24       MP4_INVALID_AUDIO_TYPE is returned.
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DESCRIPTION

27       MP4GetTrackAudioType returns the encoding type of the  specified  audio
28       track in the mp4 file.
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30       Known audio encoding types are:
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32       MP4_MPEG1_AUDIO_TYPE
33            MPEG-1 Audio Layers I, II, & III
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35       MP4_MPEG2_AUDIO_TYPE
36            MPEG-2 low bitrate extensions to MPEG-1 Audio
37            MP4_MP3_AUDIO_TYPE is an alias for this value
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39       MP4_MPEG2_AAC_MAIN_AUDIO_TYPE
40            MPEG-2 AAC Main profile
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42       MP4_MPEG2_AAC_LC_AUDIO_TYPE
43            MPEG-2 AAC Low Complexity profile
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45       MP4_MPEG2_AAC_SSR_AUDIO_TYPE
46            MPEG-2 AAC SSR profile
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48       MP4_MPEG4_AUDIO_TYPE
49            MPEG-4 Audio, includes MPEG-4 extensions to AAC
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51       MP4_PRIVATE_AUDIO_TYPE
52            User private type
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SEE ALSO

55       MP4(3) MP4AddAudioTrack(3)
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59Cisco Systems Inc.                Version 0.9                           MP4(3)
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