mp4convertfrommovieduration.3

网络MPEG4IP流媒体开发源代码

.TH "MP4" "3" "Version 0.9" "Cisco Systems Inc." "MP4 File Format Library"
.SH "NAME"
.LP 
\fBMP4ConvertFromMovieDuration\fR \- Convert a duration from the movie (file) time scale to a specified time scale.
.SH "SYNTAX"
.LP 
#include <mp4.h>
.LP 
u_int64_t \fBMP4ConvertFromMovieDuration\fR(
.br 
	MP4FileHandle \fIhFile\fP,
.br 
	MP4Duration \fIduration\fP,
.br 
	u_int32_t \fInewTimeScale\fP
.br 
)
.SH "ARGUMENTS"
.LP 
.TP 
\fIhFile\fP
Specifies the mp4 file to which the operation applies.
.TP 
\fIduration\fP
Specifies the duration that is to be converted.
.TP 
\fInewTimeScale\fP
Specifies the new time scale in ticks per second to which the duration should be converted.
.SH "RETURN VALUES"
.LP 
Upon success, the duration in the new time scale units. Upon error, 0.
.SH "DESCRIPTION"
.LP 
\fBMP4ConvertFromMovieDuration\fR converts a duration such as the total movie (file) duration from the movie time scale to another specified time scale.
.SH "SEE ALSO"
.LP 
MP4(3) MP4GetDuration(3)