Jerky H.264 HD video playback

Hi folks,
I finally installed QuickTime 7.0.2 for Windows. Enough of those preview releases already... Anyway, trying to play back some HD stuff I downloaded previously is giving me problems. It's a new 3.0 GHz Dell and I tried to play the 720p version of Batman Begins. During playback the screen is jerky as if there is a resource problem (though the sound is OK). I checked and CPU usage is below 50%. I even tried re-installing, no dice. Finally I tried to play the larger 1080p version and that works perfectly. My only conclusion is that something's wonky with the PC version of the 720p HD videos (same thing with Fantastic Four). Now the videos play nicely on a Mac and in VLC, so it has me stumped.
Cheers,
Michael

I have H.264 video playback too. I am have tried vlc player and it plays a little bit smoother but still not very well. I have looked at my settings in quicktime but it hasnt helped. Anyone have some troubleshooting ideas???

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    Here are some basics....
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    You didn't state how you are live streaming, meaning what bandwidth delivery service you are using.  Live streaming only via RTMP won't get you to successful iPad and iPhone HTTP Live Stream.  On-demand delivery to iOS devices normally requires .mp4 video files to be hosted, which Macs and PCs also understand via RTMP delivery.   But unless your delivery service can convert .f4v or .flv files to .mp4 on the fly there is no easy way to to get to iOS via the direct file output of FMLE as of today.   Sometimes we upload live encoded project files to our www.Wistia.com account for PC, Mac and iOS delivery.  This is a YouTube / Vimeo paid type hosting service for on-demand only.
    Some commercial CDNs (Content Delivery Networks) today allow an inbound live RTMP into their system using FMLE.  Then they re-mux that RTMP stream into HLS delivery for iOS.  Some work well using the native MP3 audio codec (Internap), but most require FMLE to have the AAC audio codec installed from Main Concept for $200.  Or people use Wirecast from Telestream which is $500 per license to be able to run two instances on that one license.
    In my 15 years of being a big commercial webcaster here in Silcion Valley, I have yet to find the perfect simple and easy and affordable RTMP to HLS live and on-demand delivery system.  We currently do it different ways with multiple providers depending on the job.  More offerings are coming out now and we try them all as they come down the pike.
    Harvey Louie
    Event Compression Group

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