Need help from 24" 2.4GHz alu users

Discussion in 'iMac' started by qom, Oct 6, 2007.

  1. qom macrumors member

    Joined:
    Oct 6, 2007
    #1
    Hi!

    I'm currently thinking of buying an 24" iMac, due to that my 2GHz MacBook doesn't have the power to play 1080p mkv's without stutters, freezes etc.

    Would be great if you could snatch the samples below and report if you're experiencing any problems with playback.

    Don't want to end up with a piece of expensive equipment which cannot fullfill my needs, again.

    Sample 1:
    http://www.megaupload.com/?d=8KBO1SBJ

    Sample 2:
    http://www.megaupload.com/?d=YMRR89L0

    Sample 3:
    http://rapidshare.com/files/54661828/sample.mkv.html

    Anyone else that uses their iMac as a semi HTPC computer?
    If you watch an enitire 1080p movie, does the fans get loud?

    Many thanks for your help!
    Per
     
  2. HLdan macrumors 603

    HLdan

    Joined:
    Aug 22, 2007
    #2
    I downloaded sample 1 and it was flawless on my iMac. I have the 2.8Ghz model with 4GB ram. I'm sure the 2.4 would play equally as well with 2GB ram. My fans never rev up when playing HD video.
     
  3. jhkingsr macrumors regular

    Joined:
    Mar 23, 2007
    Location:
    NC
  4. qom thread starter macrumors member

    Joined:
    Oct 6, 2007
    #4
    Could someone please try some other samples too?
     
  5. jhkingsr macrumors regular

    Joined:
    Mar 23, 2007
    Location:
    NC
    #5
    Megaupload would only let me get the first file then said I was over the download limit. Sample 3 played perfectly, just like #1.

    BTW, used VLC for playback.
     
  6. qom thread starter macrumors member

    Joined:
    Oct 6, 2007
  7. RevToTheRedline macrumors 6502a

    RevToTheRedline

    Joined:
    Sep 27, 2007
    #7
    The Macbook won't properly decode full 720 and 1080p videos because its graphics chip can't it has onboard GMA 950 card.

    The ATI HD series in the iMacs has full hardware decoding for all popular video formats.
     
  8. qom thread starter macrumors member

    Joined:
    Oct 6, 2007
    #8
    720p is not a problem on a MacBook actually.
    It's when you're decoding 1080p with bitrates that reaches above 7000kbit/s it start to get choppy.

    I watched The Fifth Element few weeks ago, playback was fine mostly, but every ten minutes or so the video would freeze, while the audio still would playback, this lasted up to 10 seconds or so, highly annoying.

    I'm not certain, but I don't think that the iMacs (or any other computer for that matter) benefits from the GPU, since the decode isn't hardware bound.

    If I were to boot in to XP with my MacBook and get a decent codec, I would probably get flawless playback, but hey, who wants to use XP, right? :(

    OSX needs a proper codec that could use both cores

    Seems like 400MHz makes a big difference.
     
  9. flopticalcube macrumors G4

    flopticalcube

    Joined:
    Sep 7, 2006
    Location:
    In the velcro closure of America's Hat
    #9
    My MacBook can do 720p with no problems and can handle most 1080p material as well. The next MacBook (if it comes with the X3100 GPU) should be able to handle all 1080p material.
     
  10. RRK macrumors 6502

    RRK

    Joined:
    Mar 14, 2007
    Location:
    USA/Ohio/Columbus
    #10
    Though I am on the 2.8ghz version no one else looked at the 2nd one. It looked great on here.
     
  11. qom thread starter macrumors member

    Joined:
    Oct 6, 2007
    #11
    Thanks, atleast that something :)

    No stutters in the scene when the man comes walking with a dog?
     
  12. RRK macrumors 6502

    RRK

    Joined:
    Mar 14, 2007
    Location:
    USA/Ohio/Columbus
    #12
    Had to watch it again but actually it does stutter a little, I think, in the overhead shot of the guy with the dog (not the long shot).
     
  13. RevToTheRedline macrumors 6502a

    RevToTheRedline

    Joined:
    Sep 27, 2007
    #13
    It's not the system making it stutter, it's the video itself. VLC shows full framerate.
     
  14. qom thread starter macrumors member

    Joined:
    Oct 6, 2007
    #14
    RevToTheRedline: You're right.
    I just wanted to see if that was the case :)
     

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