video doesn't show on firefox but work fine on chrome

mutouzi — Aug 19, 2014 04:55AM EDT

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video(flv) doesn't show on firefox but work fine on chrome, on firefox only sound played. but if I use mp4 it's work fine.

I use firefox 30.0

this is example for my code

jwplayer("myElement2").setup({
file: "movie.flv",
width: '860px',
height: '500px'
});