My advice would be to forget 3GP. I'm working on a project that was originally going to support 3GP, but we decided to abandon it, because it doesn't make sense for us to chase every device that can play video.
We decided that we will take a different route and only support the iPhone, iPod Touch and higher-end Nokia S60 devices. Yes, there are plenty of other devices, but we'd rather target the handsets whose owners are likely to afford the data plans needed to enjoy videos on the go and provide them with nice H.264 content instead of crappy 3GP content. The 3GP-enabled phones are used by the non-tech savvy majority who will never watch our content because they don't know how or can't afford the prices the operators are asking for data transfer. Rather that waste our time on creating crappy videos that nobody'll watch, we are focusing our efforts on producing high-quality videos for those who are interested and can afford to download them. Just my $0.02 -- Jacek Artymiak http://devGuide.net Facebook: http://www.facebook.com/group.php?gid=50168432081 Twitter: http://twitter.com/devguide RSS Feed: http://feeds.feedburner.com/devguide-net