How to config iPhone video streaming from Apache?

I have an Apache HTTP server with mod_h264_streaming module install开发者_StackOverflow社区ed. It works fine for all cases, except the iPhone. What can be the reason?

I've solved the issue. The problem was an encoding of the content, but I didn't discover it earlier, since the module worked, if I played the whole movie, but not if I used 'virtual clip' feature. The above means thate http://host:port/name.mp4 works fine, but http://host:port/name.mp4?start=200&end=500 doesn't work. I thought that if it is codec problem it should not work in both cases. However after change of encoding to recommended at mod_h264_streaming module site, the issue disappeared.