Set playback position

Hello,
I have a Player created like this
Player player = Manager.createPlayer(Manager.createDataSource(new URL("http://www.sample.com/movie.mpg")));I've tried to change the playback position like this
player.setMediaTime(new Time(mediaNanoSeconds));
player.start();but it seems that the player is freezing.
Is it possible to change the playback position of a player with a http source?
Thank you!

Hello captfoss,
Thank you for your advice. I looked on JMF API and saw that class Player doesn't implement interface Seekable. Still if the media is on your machine and you create a player you can skip some frames. Maybe I didn't understand your suggestion. I tried a different approach with FramePositioningControl but no success. I know that in JMStudio if you try to open a file from a url the seek bar doesn't appear but i thought that you can do this by code. I guess that if the media file is not on your local machine you can't change the playback position.

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