* at configuration time or in a "ffpresets" folder along the executable
* on win32, in that order. If no such file is found and
* codec_name is defined, then search for a file named
* at configuration time or in a "ffpresets" folder along the executable
* on win32, in that order. If no such file is found and
* codec_name is defined, then search for a file named
*
* @param filename buffer where the name of the found filename is written
* @param filename_size size in bytes of the filename buffer
*
* @param filename buffer where the name of the found filename is written
* @param filename_size size in bytes of the filename buffer