1MP4(3) MP4 File Format Library MP4(3)
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6 MP4Modify - Modify an existing mp4 file
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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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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.
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27 flags Currently ignored.
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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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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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45 MP4(3)
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49Cisco Systems Inc. Version 1.0 MP4(3)