22.8. sndhdr --- Determine type of sound file¶
Source code: Lib/sndhdr.py
The sndhdr provides utility functions which attempt to determine the type
of sound data which is in a file. When these functions are able to determine
what type of sound data is stored in a file, they return a
namedtuple(), containing five attributes: (filetype,
framerate, nchannels, nframes, sampwidth). The value for type
indicates the data type and will be one of the strings 'aifc', 'aiff',
'au', 'hcom', 'sndr', 'sndt', 'voc', 'wav', '8svx',
'sb', 'ub', or 'ul'. The sampling_rate will be either the actual
value or 0 if unknown or difficult to decode. Similarly, channels will be
either the number of channels or 0 if it cannot be determined or if the
value is difficult to decode. The value for frames will be either the number
of frames or -1. The last item in the tuple, bits_per_sample, will either
be the sample size in bits or 'A' for A-LAW or 'U' for u-LAW.
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sndhdr.what(filename)¶ Determines the type of sound data stored in the file filename using
whathdr(). If it succeeds, returns a namedtuple as described above, otherwiseNoneis returned.在 3.5 版更改: Result changed from a tuple to a namedtuple.
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sndhdr.whathdr(filename)¶ Determines the type of sound data stored in a file based on the file header. The name of the file is given by filename. This function returns a namedtuple as described above on success, or
None.在 3.5 版更改: Result changed from a tuple to a namedtuple.