Msg#: 4670952 posted 12:39 pm on May 30, 2014 (gmt 0)
Welcome to WebmasterWorld, rooma54.
I've never attempted or been asked to do such a thing, so no solid answer or direction from me. However, I did locate this Microsoft MSDN thread titled Add markers to Windows Media Player media item [social.msdn.microsoft.com] that looks like it may offer at least some direction. The example is using C#, but perhaps you can rewrite it in PHP.