mp4gettracknumberofsamples.3

完整的RTP RTSP代码库

.TH "MP4" "3" "Version 0.9" "Cisco Systems Inc." "MP4 File Format Library"
.SH "NAME"
.LP 
\fBMP4GetTrackNumberOfSamples\fR \- Get the number of samples in a track
.SH "SYNTAX"
.LP 
#include <mp4.h>
.LP 
u_int32_t \fBMP4GetTrackNumberOfSamples\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 number of samples is desired.
.SH "RETURN VALUES"
.LP 
Upon success, the number of samples in the track. Upon an error, 0.
.SH "DESCRIPTION"
.LP 
\fBMP4GetTrackNumberOfSamples\fR returns the number of samples in the specified track in the mp4 file. Sample id's are the consecutive sequence of numbers from 1 to the total number of samples, i.e. 1\-based indexing, not 0\-based indexing.
.SH "SEE ALSO"
.LP 
MP4(3)