I'll see if I can produce a working clip. I wonder if this might be a way to play remuxed H.264 on an Xbox 360, since if you make the chunk size small enough then it's almost like live streaming MP4. Apparently the 360 supports Smooth Streaming, so it may be possible to serve ismv up over DLNA.
Great technical explanation of ismv format (
IIS
Smooth-streaming
Media
Video) here:
http://alexzambelli.com/blog/2009/02/10 ... hitecture/Does Windows Phone playback of MP4 definitely work for you? The first time I attempt to play an MP4 (H.264 + AAC) movie it returns invalid source without me even attempting playback. This is on Windows Phone 8.1 Dev Preview (which I believe is IE11):

The next video I try to select it just jumps to the Playlist side screen and doesn't show me the player. From then on MediaBrowser stops working. All further selections just jump to the Playlist view and the arrow to get back to the player is greyed out.