I ran a lot of experiments and finally I wrote a VERY FAST script to convert videos to my iPod Nano 3rd Generation. It encode videos to XviD with ffmpeg and utilizes AAC as audio codec. The final quality is good, the result video file is small and the conversion time is short. So, what else could you want???
"Opção de montagem inválida ao tentar monta o volume USBDISK"
provavelmente vc está com um problema no fstab. Para corrigí-lo basta fazer o seguinte: