Re: [SoX-users] channels out of sync converting wav to mp3

[Jan S. <ha...@st...>]

On Sep 26 18:32:03, Gregory Malsack wrote:
> Hey All, 
> 
> I manage an asterisk server. The system records all calls coming into the system to a wav file. My client wants the files stored on his website as an mp3 for people to download. I'm using sox to run the conversion, but I'm having problems where the conversation is not correctly timed in the mp3 file. The call will start out ok, but at random times anywhere from 30 seconds to 5 minutes into the call recording, you can hear the 2 channels falling out of sync, and eventually the 2 people in the recording are talking on top of each other. The wav file is right, but the mp3 version is not. 

Can you please put a small wav and mp3 example file
somewhere for download for us to hear?

> Has anyone experienced this problem?

I have never seen this. A priori, I blame libmp3lame.so.
Does the same happen when you compile sox with another encoding library?
Does the same happen in sox when converting to other formats?
Does the same happen with other MP3-encoding software?

> sox /recordings/$file_name.wav /frink/$file_name.mp3 

Try again with -V5.
What version of SoX is this?


	Jan