I'm using Strobe Media Playback with rtmp Wowza & FM server (still trying to decide which I like better). Most of my videos stream wonderfully, but a couple of them require abnormally long buffering times about 50% of the times I navigate with the seeking bar. This seems to not rely on the size or length or quality of the movie- I have huge movies that never require the buffer (in the office intranet) and tiny movies that require constant buffering.
Most interestingly, it seems that if I click on the navbar while it's buffering, playback starts. So it's not that it needs to buffer, but for some it takes 5 seconds of unnecessary buffering. Why would this be?
What is the bitrate of video that you are saying are not playing smoothly. In case you are playing very high bitrate videos and your bandwidth is not that great, you should expect to see rebufferings. Also what is the buffer time you have set on your player?