Description info = mmfileinfo(filename) returns a structure, info, with fields containing information about the contents of the multimedia file identified by filename. The filename input is a string enclosed in single quotation marks. If filename is a URL, mmfileinfo might take a long time to return because it must first download the file. For large files, ® downloading can take several minutes. To avoid blocking the MATLAB command line while this processing takes place, download the file before calling mmfileinfo. The info structure contains the following fields, listed in the order they appear in the structure. Field
Description
Filename
String indicating the name of the file.
Path
String indicating the absolute path to the file.
Duration
Length of the file in seconds.
Audio
Structure containing information about the audio data in the file. See Audio Data for more information about this data structure.
Video
Structure containing information about the video data in the file. See Video Data for more information about this data structure.
Audio Data The Audio structure contains the following fields, listed in the order they appear in the structure. If the file does not contain audio data, the fields in the structure are empty. Field
Description
Format
Text string, indicating the audio format.
NumberOfChannels
Number of audio channels.
Video Data The Video structure contains the following fields, listed in the order they appear in the structure. If the file does not contain video data, the fields in the structure are empty. Field
Description
Format
Text string, indicating the video format.
Height
Height of the video frame.
Width
Width of the video frame.
Examples Display information about the example file xylophone.mpg: info = mmfileinfo('xylophone.mpg') audio = info.Audio video = info.Video
MATLAB returns: info = Filename: 'xylophone.mpg' Path: 'matlabroot\toolbox\matlab\audiovideo'
Information about multimedia file - MATLAB mmfileinfo.pdf ...
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