hachoir-metadata extracts metadata from multimedia files: music, picture, video, but also archives. It tries to give as much information as possible. For some file formats, it gives more information than libextractor for example, such as the RIFF parser, which can extract creation date, software used to generate the file, etc. But hachoir-metadata cannot guess informations. The most complex operation is just to compute duration of a music using frame size and file size.
WWW: https://bitbucket.org/haypo/hachoir/wiki/hachoir-metadata
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