[Asterisk-Users] Can I recreate a Fax from a recorded file?

[Steve Underwood]

Alexander Lopez wrote:

> This is a very KGB / NSA / InterPOL / CIA type question, but if I have 
> a recorded file (G.711, no compression) can I feed it into standard in 
> of an application and have it recreate the fax that was send?
>
> I don’t know enough about the Fax handshaking to understand this.
>
In spandsp there is a program in the tests directory called fax_decode. 
It isn't very sophisticated, as it is intended for my test work, rather 
than general decoding. It is able to decode some FAX audio from a wave 
file, though.

There are some expensive commercial programs which do the job. Because 
FAX only sends one way at a time, the audio from the two directions is 
never jumbled up in recordings.

Steve