mp4read.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 
\fBMP4Read\fR \- Read an existing mp4 file
.SH "SYNTAX"
.LP 
#include <mp4.h>
.LP 
MP4FileHandle \fBMP4Read\fR(
.br 
	const char* \fIfileName\fP, 
.br 
	u_int32_t \fIverbosity\fP = 0
.br 
);

.SH "ARGUMENTS"
.LP 
.TP 
\fIfileName\fP
Specifies the path name of the file to be read.
.TP 
\fIverbosity\fP
Specifies a bitmask of diagnostic details the library should print to stdout during its functioning. See MP4SetVerbosity() for values.

.SH "RETURN VALUES"
.LP 
Upon successful completion the function returns a handle to the existing mp4 file. This is used in subsequent calls to the library to read information from the file.
Upon an error, MP4_INVALID_FILE_HANDLE is returned.
.SH "DESCRIPTION"
.LP 
\fBMP4Read\fR is the first call that should be used when you want to just read an existing mp4 file. It is equivalent to opening a file for reading, but in addition the mp4 file is parsed and the control information is loaded into memory. Note the actual track samples are not read into memory until  MP4ReadSample() is called.

.SH "SEE ALSO"
.LP 
MP4(3)