Long time since you posted this problem.
I've had the same error but i created a new videofile in
AnyVideoConverter using Customized MP4 Movie - putting the codec
settings to x264. And the video size at 480x272.
Now i don't really know the size limit for the Iphones. But I know
it is a bit higher than that. Anyway my mp4 files play great on ie9
It make me mad too.
I've the same problem than Avshash. Impossible to read an mp4(h264,
no audio) in IE9. No one seems to have an answer to that
question!!!?? incredible. I spend time on several website about
html5 and video and no respons...
For me the issue was that I am using the html5 boilerplate...
and, in the HEAD, I had the js includes for videojs BEFORE the
modernizr includes. moving the videojs include below the modernizr
solved the issue for me.
Thank you @Brian Irwin for confirming this, was losing my sanity
for a minute there. So attaching a screenshot - when I visit
http://videojs.com and test the
player, the audio plays on the demo, but not the video. I have been
trying to debug this all day, to no avail. Any ideas out there?