Convert video/audio for my new cell phone

I just got a new cell phone, which can play MPEG4 AAC audio and video.

To convert arbitrary video, such as Google Video, for my new N902i:

ffmpeg -y -i downloaded.mp4 -bitexact -fixaspect -s 176x144 -r 14.985 -b 400 -acodec aac -ac 2 -ar 16000 -ab 32 -f 3gp MOL001.3GP

to convert audio:

ffmpeg -i my.ogg -acodec aac -ac 2 -ab 128 test.m4a