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📛 NAME

sndhdr - Routines to help recognizing sound files.

🚀 Quick Reference

Use Case	Command	Description
🔬 Recognize sound header	import sndhdr; info = sndhdr.whathdr('file.wav')	Returns a tuple (type, rate, channels, frames, bits) or None
🔍 Guess sound type	sndhdr.what('file.au')	Convenience wrapper around whathdr()
🧪 Test all files in a directory	python -m sndhdr or sndhdr.test()	Runs what() on all files in current directory
📁 Recursive test	sndhdr.test('-r')	Recurse into subdirectories

📚 MODULE REFERENCE

https://docs.python.org/3.10/library/sndhdr.html

The following documentation is automatically generated from the Python source files. It may be incomplete, incorrect or include features that are considered implementation detail and may vary between Python implementations. When in doubt, consult the module reference at the location listed above.

📖 DESCRIPTION

Function whathdr() recognizes various types of sound file headers. It understands almost all headers that SOX can decode.

The return tuple contains the following items, in this order:

• 🎵 file type (as SOX understands it)
• 📊 sampling rate (0 if unknown or hard to decode)
• 🔊 number of channels (0 if unknown or hard to decode)
• 📐 number of frames in the file (-1 if unknown or hard to decode)
• 🎚️ number of bits/sample, or 'U' for U-LAW, or 'A' for A-LAW

If the file doesn't have a recognizable type, it returns None. If the file can't be opened, OSError is raised.

To compute the total time, divide the number of frames by the sampling rate (a frame contains a sample for each channel).

Function what() calls whathdr(). (It used to also use some heuristics for raw data, but this doesn't work very well.)

Finally, the function test() is a simple main program that calls what() for all files mentioned on the argument list. For directory arguments it calls what() for all files in that directory. Default argument is "." (testing all files in the current directory). The option -r tells it to recurse down directories found inside explicitly given directories.

🔧 FUNCTIONS

🔍 what(filename)

Guess the type of a sound file.

🔬 whathdr(filename)

Recognize sound headers.

📦 DATA

__all__ = ['what', 'whathdr']

📁 FILE

/usr/lib/python3.10/sndhdr.py

📛 NAME 🚀 Quick Reference 📚 MODULE REFERENCE 📖 DESCRIPTION 🔧 FUNCTIONS 📦 DATA 📁 FILE