Flash video and precise skipping

I am deploying a jwplayer (http://www.longtailvideo.com/players/jw-flv-player/) to a website and I am not 100% satisfied with the way the player behaves when you skip to a new position, you press the timeline at one spot, but it skips to a different location. (the elapsed time indicator)

This is also ha开发者_运维百科ppening on youtube, especially on shorter videos: http://www.youtube.com/watch?v=hv7ha_iCM2Y

It seems this is a problem with flash video in general? Or can this be solved by using for instance streaming video instead of progressive HTTP playback?

Other things?

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This is caused by something called GOP (no, not the Republican party) which is used when compressing video: http://en.wikipedia.org/wiki/Group_of_Pictures

In some compression methods the codec will need the information of the frames before to construct the actual frame and only every n-th frame (called a keyframe or I-Frame) will actually be stored "as is" - those are the frames you can skip to. This also means that it gets more noticeable on shorter videos as the scale of the time scrubbing gets more precise.

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Skipping in an FLV will actually skip to the nearest video keyframe. You can increase the accuracy by encoding the videos with a higher keyframe density, although this will increase the file size.