Convert .ts (or .avi) files to .3gp

I use this command to convert .ts (or .avi) files to .3gp format in Debian Lenny (with debian-multimedia repositories included):

ffmpeg -i input_file.ts -s qcif -vcodec h263 -acodec libfaac -ac 1 -ar 8000 -r 25 -ab 32k -y output_file.3gp

Result .3gp files play fine in my Nokia 7610 Supernova.

Sources:
http://goinggnu.wordpress.com/2007/02/13/convert-avi-to-3gp-using-ffmpeg/