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  1. #1
    SitePoint Wizard
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    HD FLV or MP4? Which requires less resources in Flash Player?

    I am currently adding a Super HD option to my site that will allow for a much higher bitrate than our current HD and larger dimensions.

    While I had just figured I'd increase the bitrate on (let's say) a 720p file during conversion to FLV, would it be easier for visitors to run an MP4 instead of FLV?

    In short, which file type demands more resources from the user's computer? FLV or MP4? The least demanding in this size would obviously be the preffered choice.

    Thanks
    Ryan
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  2. #2
    Community Advisor silver trophy

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    It's not the file format that makes the difference it's the codec used.

    For HD you'll have to discount using sorenson spark as it's not sufficiently bandwidth efficient compared with on2 vp6-e/s and h.264

    According to this pdf you ought to get a 10% reduction in cpu using h.264. You could make further cpu reductions by using a simpler profile than main (i.e baseline) but I'm not sure the marginal gain (a couple %) is worth the lower visual quality.
    On2 vp6-s was designed as a lower cpu alternative to normal vp6(-e) so it's worth investigating too.


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