Recently I downloaded few video clips which were in RMVB (Real Media Variable Bitrate) format. I was able to play them easily on my PC using Real Player, but I wanted to play the videos on my PSP ( Play Station Portable).

As most of the PSP owners would know that the only playable format in PSP is MP4. So I downloaded at least a dozen video converters, but none worked.

Finally, after searching most of the PSP support forums, found Xvid4psp video converter, which worked like a charm.
If you are a PSP owner and are suffering from the problem I had, download Xvid4Psp and enjoy your videos.
By the way, in addition to RMVB, Xvid4Psp supports most of the video formats.