hi, if you want to convert rm into 3GP , here is some information ,which is deserved to have a look

Up to now, there have been many video formats in use, among which the commonly applied are AVI, ASF, MPEG/MPG/DAT, DIVx, MOV, RM, RMVB. There is a relevant player for each formatted video.

QuickTime for MOV, Real Player for RM, just take these two examples. You know, we can’t own players for all formats. As 3G phone is well entrenching on the realm of conventional handset market, watching movie on-the-go has become a kind of fashion.

But at least for the time being, the formats supported by 3G phones are anything but many. Then how to make that ‘movie your commute’ be realized? Conversion from those alienated formats to accepted ones is the answer.

And there's something always annoys our friends or others customers. How we can convert the large volume video/audio file formats to the ones we desired. In the mean time ,because a lot of people was not very familiar with the knowledge of video/audio file formats. So some of my friends often asked me if there are some convenient and easy to use video/audio converter softwares .

Of course ,There are a lot of software which can help them to solve the problems.
But beforehand ,we also should know some of the knowledge about the video/audio ,so we can use these tools much more easier.


RM-3GP
RM ,for its small size and little loss of original video , has gained a popular application on the Internet. But currently only a few smartphones support RM, then how to make you handset play this Internet borne video? Use Xilisoft 3GP video converter to click the whole process. This software offers multithreading and batch conversion, and so just a click ,you can convert several files into 3GP video ,at the same time. 3GP, created to work in a fast data transmission network, is supported by all 3G phones.

RMVB-3GP
RMVB, an extension of enhanced RM, takes on an even smaller volume as a result of its variable sampling rate technology. Advantage in one aspect always comes at the cost of other aspects. For RMVB, its convenience brought about by the small size leads to a headache, the difficulty of conversion. Few converters nowadays support this format. Winavi is a powerful converter able to converter rmvb files into mpeg2,dvd, etc. making it easier to converter further into 3gp.