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What's the big deal with 30fps?

Discussion in 'Android Devices' started by Hal Jordan, Jun 23, 2010.

  1. Hal Jordan

    Hal Jordan Active Member
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    I don't get what the big deal with the 30fps is? Can anyone explain?

    I know film is at 24fps but isn't TV generally around 30fps anyways?

    Is this just so we can watch movies at their native rate or something? I'm just wondering if I should pursue trying to follow this trend.

    Thanks in advance.
     

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  2. MrX8503

    MrX8503 Well-Known Member
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    Your first problem is trying to correlate film/tv FPS to the FPS cap of a phone.

    The FPS cap doesn't affect only video, it affects EVERYTHING. Your 7 home screen scrolling, scrolling of lists, animations, any kind of gaming, touch lag, basically anything that MOVES, is affected by the 30fps.

    If you like to see how this translates to real world use, look up youtube videos of the EVO running side by side with the Nexus 1 and Droid Incredible.

    There is a semi fix for this issue over at XDA. You can read more about it there.
     
  3. sagedil

    sagedil Well-Known Member
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    It is an issue for gaming. For *some* people.

    And now a whole new thread for *some* people to whine in. Thank you ... sigh.
     
  4. EarlyMon

    EarlyMon The PearlyMon
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    Movies are at 24 fps, but when shown in theaters, they're shuttered to 48 Hz (each frame doubled), in a few esoteric theaters, they're shuttered to 96 Hz.

    Without that, that frame rate falls below our flicker fusion threshold and things separate into jerky, 8-mm film look, instead of smooth motion.

    30 fps is a huge improvement over 24 fps because that, together with video playback flicker management (on LCDs, plasmas, phone screens, you name it) gets above that critical threshold.

    At 10 fps, there's nothing you can do.

    Another issue is the fact that the Evo is using the MPEG-4 Part 2 codec as opposed to the much better looking and motion optimized MPEG-4 Part 10, aka H.264.

    That's due to the actual video library engine embedded in Android and is not HTC's fault per se. Another company specializing in codecs has been working on the across-the-board video library (codec set) upgrade to Android since at least April 2009 and seem now to be confident that they may succeed with integration with Froyo (more flexible architecture).

    FWIW, I've verified near-30 fps when video recording on my Evo at VGA resolution, but only near-10 fps when shooting at 720p.

    As for the frame rate issue being tied to games - yes - both problems exist, but until the fix is out, we can't know with 100% certainty if that's two problems or two problems stemming from one problem or just one problem.

    With the xda magicians already beginning to break the 30 fps/720p barrier on the Evo, it confirms that HTC took a more conservative approach when integrating the two cameras and HD recording.

    Other than that, I'm content to be patient on this.

    The problem is multi-dimensional and I'd rather give them time to have everything fixed PROPERLY rather than a thing here, a thing there.
     
  5. zpilot

    zpilot Well-Known Member
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    It is definitely not just for gaming ;)
     
  6. zamardii12

    zamardii12 Well-Known Member
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    Observe the difference... YouTube - Evo 4g, uncapped graphics.

    <object width="640" height="385"><param name="movie" value="http://www.youtube.com/v/9hpsK0YWClM&hl=en_US&fs=1&"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/9hpsK0YWClM&hl=en_US&fs=1&" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="640" height="385"></embed></object>
     
  7. tardmobile

    tardmobile Well-Known Member
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    there is no big deal
    "some people" will literally cry about anything that doesn't give them the biggest numbers on a benchmark. math vs physics. numbers vs reality of application.
     
  8. NeoteriX

    NeoteriX Well-Known Member
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    ...when has math ever been "in conflict" with physics?

    :)

    Just giving ya a hard time.
     
  9. MrX8503

    MrX8503 Well-Known Member
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    Look at the video, its not just gaming

    Look at the video, its not just benchmarks. It translates to realworld performance.

    I swear some people can be so dense. With video proof people still refuse to accept that there was a problem. Be lucky that XDA even cares enough to make a fix for this.
     
  10. sagedil

    sagedil Well-Known Member
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    Mr X, you think we are all so dense, why are you here? And BTW, calling people dense on the forum is a TOS violation. Complaint already sent.
     
  11. Hal Jordan

    Hal Jordan Active Member
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    Thanks for the input guys.

    Now let's all kiss and make up.

    This forum rocks.
     
  12. J03

    J03 Well-Known Member
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    Denver
    :D lol.
     
  13. tardmobile

    tardmobile Well-Known Member
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    meant more mathematicians vs physicists

    is this guy trying to tell me I'm getting youtube videos at higher than 30fps?
     
  14. hawkijustin

    hawkijustin Well-Known Member
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    Exactly, lets keep it that way. Forum Nazi's and trolls only hurt forums people.
     
  15. EarlyMon

    EarlyMon The PearlyMon
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    Lets implies permission as opposed to let's, meaning let us. The plural for Nazi is Nazis not Nazi's and you wanted a comma after forum.

    And trolls never appeared on networks until they put in bridges.

    Just because I'm a Grammar Nazi doesn't mean our charter disallows us to act as Syntax or Spelling Nazis.

    Wait... you wanted LESS Nazism? :thinking:
     
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