Fan turns on everytime i watch a online video.

Discussion in 'MacBook' started by laststanding, Jun 3, 2009.

  1. laststanding macrumors newbie

    Joined:
    Apr 27, 2009
    #1
    Why?

    Lets say i turn on the laptop and if i watch the video first thing.. fan will start blowing sirens...
     
  2. NewMacbookPlz macrumors 68040

    NewMacbookPlz

    Joined:
    Sep 28, 2008
    #2
    What model do you have?

    On my UMB2.0, the fans will only ramp up after a while of flash video, and even then it depends on the bitrate.

    The reason though that the fans spin up for online video is because Adobe Flash for Mac is pisspoor in terms of CPU useage--it uses a LOT more cycles than it needs to, so it makes more CPU heat, so the fans have to spin up.

    Do you have anything like SMCFanControl installed? It sounds like your fans are responding to % CPU used as opposed to core diode temperature.
     
  3. MacManiac76 macrumors 65816

    MacManiac76

    Joined:
    Apr 21, 2007
    Location:
    Arizona
    #3
    I assume this is a Flash based video. Flash is well known to cause CPU usage spikes on OS X and as such cause the fans to kick into high gear. FYI the fans are always on and running if the computer is on, they are a very integral part of the cooling system. Under light usage the RPMs are just low enough that you can't hear the fans.
     
  4. njl macrumors regular

    Joined:
    Mar 15, 2009
    Location:
    SAT
    #4
    fwiw, my 06 macbook spins all the time on vids.. it's just old and outdated everything..
     
  5. Burning Radio macrumors regular

    Joined:
    Apr 11, 2009
    #5
    I was thinking the other day that why do iPhones/iPod touches play video so effortlessly on such a smaller amount of computing/processing power? Wouldn't Apple try to incorporate the same technology into the full version of Mac OS X?

    Just a thought. Now everyone can jump at this and explain to me why I'm an idiot for thinking this. :D
     
  6. NewMacbookPlz macrumors 68040

    NewMacbookPlz

    Joined:
    Sep 28, 2008
    #6
    h.264 encoded video is far more decoding-efficient than Flash on OS X. Also, the entire case acts like a heatsink and aid in heat dissipation.

    Also, iPhone video for instance is only 240-320 lines of resolution, whereas online Flash video can be 480p or 720p depending on the source.
     
  7. Burning Radio macrumors regular

    Joined:
    Apr 11, 2009
    #7
    Oh ok. That does make sense. I just thought OS X had trouble playing any .flv file.
     
  8. NewMacbookPlz macrumors 68040

    NewMacbookPlz

    Joined:
    Sep 28, 2008
    #8
    It's not really an issue with OS X. It's more an issue with Adobe Flash player for OS X.

    And just to clarify my previous post, all video on iPods/iPhones is h.264 encoded, even the YouTube channel. Those videos are specially re-encoded to h.264 for the iPhone/iPod Touch.
     
  9. Burning Radio macrumors regular

    Joined:
    Apr 11, 2009
    #9
    Oh! I didn't know that!
     
  10. laststanding thread starter macrumors newbie

    Joined:
    Apr 27, 2009
    #10
    I have the White Macbook purchased last week for 999.00
     
  11. laststanding thread starter macrumors newbie

    Joined:
    Apr 27, 2009
    #11

    How about Youtube videos? are they flashed base too?...

    Thanks for the info, really helps understanding it.
     
  12. ZebraineZ macrumors 6502

    Joined:
    Mar 17, 2009
    #12
    I think they are converted to flash, that is why uploading usually would take a while even for a small vid, which would also explain some videos getting lower quality even though they weren't so crappy. Like if I upload a video from photobooth it would be converted from whatever type it is to flash for youtube...
     
  13. RiCEADDiCTBOY macrumors 6502a

    RiCEADDiCTBOY

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    Dec 26, 2007
  14. NewMacbookPlz macrumors 68040

    NewMacbookPlz

    Joined:
    Sep 28, 2008
    #14
    For the normal computer, yes, Youtube is flash video. For the iPhone/iPod Touch however, it's h.264 type video (iTunes type format in this case).
     
  15. glitch44 macrumors 65816

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    Feb 28, 2006
  16. Mushi-shi macrumors newbie

    Joined:
    May 29, 2009
    Location:
    Sveg, Sweden
    #16
    Well on youtube atleast you have the option to find and play the QT movie insted of the flash movie so you can reduce the ammount the cpu need to work.. something i did all the time on my old Powerbook.

    http://forums.macrumors.com/showthread.php?t=475222

    (Cant say btw if the link in that tread still works because it is blocked by WebSense that we use at work)
     
  17. Batman101 macrumors member

    Joined:
    May 9, 2009
    #17
    My friend's whitebook gets hotter when she is watching youtube than she is watching an avi (700MB)
     
  18. DoFoT9 macrumors P6

    DoFoT9

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    Jun 11, 2007
    Location:
    Singapore
  19. dontwalkhand macrumors 601

    dontwalkhand

    Joined:
    Jul 5, 2007
    Location:
    Phoenix, AZ
    #19
    Technically it is not, stupid Adobe needs to get their Mac programming on the line.
     
  20. DoFoT9 macrumors P6

    DoFoT9

    Joined:
    Jun 11, 2007
    Location:
    Singapore
    #20
    oh yes totally agree - it needs to be fixed, but its a perfectly normal thing to happen in the current situation including the bad coding and whatnot. best get used to it because its not going to be fixed any time soon.
     

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