[asterisk-users] sound file length

[John Marvin]

Race Vanderdecken wrote:
> If it is a wav file you can take the size of the file in bytes and
> subtract 44.
> 

This is a hot button of mine. This is a heuristic that may work for many 
wav files, but is not true for others. A wav file header can be larger 
than 44 bytes, the wav data doesn't have to start right after the 
header, and many wav files contain meta data after the wav file data 
(and techically meta data could come before the audio data, but I've 
never seen that before). Some very poorly written wav file playing 
programs will play right through that meta data as if it was audio data.

John