1MP4(3)                      MP4 File Format Library                     MP4(3)
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NAME

6       MP4Modify - Modify an existing mp4 file
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SYNTAX

9       #include <mp4.h>
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11       MP4FileHandle MP4Modify(
12            const char* fileName,
13            u_int32_t verbosity = 0,
14            u_int32_t flags = 0
15       );
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ARGUMENTS

19       fileName
20              Specifies the path name of the file to be modified.
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22       verbosity
23              Specifies  a  bitmask  of  diagnostic details the library should
24              print to stdout during its  functioning.  See  MP4SetVerbosity()
25              for values.
26
27       flags  Currently ignored.
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RETURN VALUES

30       Upon  successful  completion  the  function returns a handle to the mp4
31       file. This is used in subsequent calls to the  library  to  modify  the
32       file.  Upon an error, MP4_INVALID_FILE_HANDLE is returned.
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DESCRIPTION

35       MP4Modify is the first call that should be used when you want to modify
36       an existing mp4 file. It is roughly equivalent to  opening  a  file  in
37       read/write mode.
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39       Since modifications to an existing mp4 file can result in a sub-optimal
40       file layout, you may want to use MP4Optimize() after you have  modified
41       and closed the mp4 file.
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SEE ALSO

45       MP4(3)
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49Cisco Systems Inc.                Version 1.0                           MP4(3)
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