|Specifies the path name of the file to be modified.|
|Specifies a bitmask of diagnostic details the library should print to stdout during its functioning. See MP4SetVerbosity() for values.|
Upon successful completion the function returns a handle to the mp4 file. This is used in subsequent calls to the library to modify the file. Upon an error, MP4_INVALID_FILE_HANDLE is returned.
MP4Modify is the first call that should be used when you want to modify an existing mp4 file. It is roughly equivalent to opening a file in read/write mode.
Since modifications to an existing mp4 file can result in a sub-optimal file layout, you may want to use MP4Optimize() after you have modified and closed the mp4 file.
|Cisco Systems Inc.||MP4 (3)||Version 1.0|