[David Moises paz]

Hello, thanks you very much, its really works!! only to put it clear for others that could read this post.


#!/bin/bash
ffmpeg -y -i $1 -b 131k -r 15 -s 176x144 -acodec libopencore_amrnb -ab 12.2k $1".3gp"


this is the final script used to achieve the result. Note that fmpeg was already compiled with amr support (allows me to put this: -acodec libopencore_amrnb), I needed to save it as .3gp file since ffmpeg give me some error about .mp4 files regards to container not supporting current library.

thanks again
greetings david