| .TH "MP4" "3" "Version 0.9" "Cisco Systems Inc." "MP4 File Format Library" |
| .SH "NAME" |
| .LP |
| \fBMP4GetTrackAudioType\fR \- Get the encoding type of an audio track |
| .SH "SYNTAX" |
| .LP |
| #include <mp4.h> |
| .LP |
| u_int8_t \fBMP4GetTrackAudioType\fR( |
| .br |
| MP4FileHandle \fIhFile\fP, |
| .br |
| MP4TrackId \fItrackId\fP |
| .br |
| ) |
| .SH "ARGUMENTS" |
| .LP |
| .TP |
| \fIhFile\fP |
| Specifies the mp4 file to which the operation applies. |
| .TP |
| \fItrackId\fP |
| Specifies the track for which the audio type is desired. |
| .SH "RETURN VALUES" |
| .LP |
| Upon success, the audio type of the track. Upon error, MP4_INVALID_AUDIO_TYPE is returned. |
| .SH "DESCRIPTION" |
| .LP |
| \fBMP4GetTrackAudioType\fR returns the encoding type of the specified audio track in the mp4 file. |
| .LP |
| Known audio encoding types are: |
| .LP |
| MP4_MPEG1_AUDIO_TYPE |
| .br |
| MPEG\-1 Audio Layers I, II, & III |
| .LP |
| MP4_MPEG2_AUDIO_TYPE |
| .br |
| MPEG\-2 low bitrate extensions to MPEG\-1 Audio |
| .br |
| MP4_MP3_AUDIO_TYPE is an alias for this value |
| .LP |
| MP4_MPEG2_AAC_MAIN_AUDIO_TYPE |
| .br |
| MPEG\-2 AAC Main profile |
| .LP |
| MP4_MPEG2_AAC_LC_AUDIO_TYPE |
| .br |
| MPEG\-2 AAC Low Complexity profile |
| .LP |
| MP4_MPEG2_AAC_SSR_AUDIO_TYPE |
| .br |
| MPEG\-2 AAC SSR profile |
| .LP |
| MP4_MPEG4_AUDIO_TYPE |
| .br |
| MPEG\-4 Audio, includes MPEG\-4 extensions to AAC |
| .LP |
| MP4_PRIVATE_AUDIO_TYPE |
| .br |
| User private type |
| .SH "SEE ALSO" |
| .LP |
| MP4(3) MP4AddAudioTrack(3) |
