.TH "MP4" "3" "Version 0.9" "Cisco Systems Inc." "MP4 File Format Library".SH "NAME".LP \fBMP4GetTrackAudioMpeg4Type\fR \- Get the encoding type of an MPEG\-4 audio track.SH "SYNTAX".LP #include <mp4.h>.LP u_int8_t \fBMP4GetTrackAudioMpeg4Type\fR(.br 	MP4FileHandle \fIhFile\fP,.br 	MP4TrackId \fItrackId\fP.br ).SH "ARGUMENTS".LP .TP \fIhFile\fPSpecifies the mp4 file to which the operation applies..TP \fItrackId\fPSpecifies the track for which the MPEG\-4 audio type is desired..SH "RETURN VALUES".LP Upon success, the MPEG\-4 audio type of the track. Upon error, MP4_MPEG4_INVALID_AUDIO_TYPE is returned..SH "DESCRIPTION".LP \fBMP4GetTrackAudioMpeg4Type\fR 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.).LP Known audio encoding types are:.LP MP4_MPEG4_AAC_MAIN_AUDIO_TYPE.br 	MPEG\-4 AAC Main profile.LP MP4_MPEG4_AAC_LC_AUDIO_TYPE	.br 	MPEG\-4 AAC Low Complexity profile.LP MP4_MPEG4_AAC_SSR_AUDIO_TYPE .br 	MPEG\-4 AAC SSR profile.LP MP4_MPEG4_AAC_LTP_AUDIO_TYPE .br 	MPEG\-4 AAC Long Term Prediction profile.LP MP4_MPEG4_AAC_SCALABLE_AUDIO_TYPE .br 	MPEG\-4 AAC Scalable.LP MP4_MPEG4_CELP_AUDIO_TYPE .br 	MPEG\-4 CELP.LP MP4_MPEG4_HVXC_AUDIO_TYPE .br 	MPEG\-4 HVXC.LP MP4_MPEG4_TTSI_AUDIO_TYPE .br 	MPEG\-4 Text To Speech.LP MP4_MPEG4_MAIN_SYNTHETIC_AUDIO_TYPE .br 	MPEG\-4 Main Synthetic profile.LP MP4_MPEG4_WAVETABLE_AUDIO_TYPE .br 	MPEG\-4 Wavetable Synthesis profile.LP MP4_MPEG4_MIDI_AUDIO_TYPE .br 	MPEG\-4 MIDI profile.LP MP4_MPEG4_ALGORITHMIC_FX_AUDIO_TYPE .br 	MPEG\-4 Algorithmic Synthesis and Audio FX profile.SH "SEE ALSO".LP MP4(3) MP4GetTrackAudioType(3)