Performance issues with 1080p quicktime video.

Discussion in 'macOS' started by nylon, May 13, 2006.

  1. nylon macrumors 6502a

    nylon

    Joined:
    Oct 26, 2004
    #1
    I have a 2 GHz MBP with 2GB Ram. I also run XP through Boot Camp. I have no problem playing 1080p Quicktime trailers at the full frame rate under both OSX and XP.

    I recentley downloaded a 1080p Quicktime video of a Macbreak episode with Leo Laporte and Sal Soghoian (Apple Script, Automator Prject Manager). You can download the video from http://twitorrents.com/bm/detail/8/f0f7f01c30d1786f5c2e9f616d45d5ba1bcb0ac0

    Under XP the 1080p quicktime video plays flawlessly at the full frame rate. However, under OSX the 1080p video only plays at half the frame rate (about 12 FPS). I have no idea why quicktime seems to be hampered under OSX.

    Anyone got any ideas?
     
  2. MacsRgr8 macrumors 604

    MacsRgr8

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    Location:
    The Netherlands
  3. nylon thread starter macrumors 6502a

    nylon

    Joined:
    Oct 26, 2004
  4. crazzyeddie macrumors 68030

    crazzyeddie

    Joined:
    Dec 7, 2002
    Location:
    Florida, USA
    #5
    The video plays perfectly on my MBP, same specs. Do you have Quicktime opening in Rosetta?
     
  5. nylon thread starter macrumors 6502a

    nylon

    Joined:
    Oct 26, 2004
    #6
    I'm not saying the video doesn't play. It just plays at 12-14 fps on OSX and 24 fps on XP.

    Quicktime is running natively. Check your fps while playing the 1080p version by pressing command + i. (Make sure you don't resize the player to fit the screen of the MBP, leave it at full res.
     
  6. dollystereo macrumors 6502a

    dollystereo

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    Oct 6, 2004
    Location:
    France
    #7
    Here to, I dont get more than 15 fps even in full screen mode.
    Very processor intensive task anyway.
    =P

     
  7. nylon thread starter macrumors 6502a

    nylon

    Joined:
    Oct 26, 2004
    #8
    Yeah, but it's the same processor under XP as well (Boot Camp). The funny thing is that Quicktime is Apple software. I thought it would run better under OSX, instead it runs at 50-60% of the frame rate under OSX.
     
  8. BakedBeans macrumors 68040

    BakedBeans

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    #9
    24fps is quite common and set by the video - 14 frames isnt though.

    is this on multiple files or have you tested just one?
     
  9. russed macrumors 68000

    russed

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    Jan 16, 2004
    Location:
    London, England
    #10
    do you have something else running at the same time that is keeping the processor happy?
     
  10. Mr. DG macrumors regular

    Mr. DG

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    Jan 16, 2006
    #11
  11. nylon thread starter macrumors 6502a

    nylon

    Joined:
    Oct 26, 2004
    #12
    The machine should not be throttled when running plugged-in. Additionally I thought OSX should automatically adjust processor usage based on need.
     
  12. Mr. DG macrumors regular

    Mr. DG

    Joined:
    Jan 16, 2006
    #13
    No, they are throttled. The energy options are gone from system preferences. this discussion at apple mentions it:

    here

    and from the ableton forum:

    here

    check page 2. It's a speedstep issue within OSX. Windows has no problems.
     
  13. nylon thread starter macrumors 6502a

    nylon

    Joined:
    Oct 26, 2004
    #14
    Wow, that's just shocking! Why would Apple put out a product of a certain spec and then actively reduce it's performance. That just seems like half- a*sed engineering to me. Perhaps this product really was rushed out.
     
  14. dmw007 macrumors G4

    dmw007

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    Working for MI-6
    #15


    Never thought that I would ever, ever see that statement! :eek: ;) :D
     
  15. Mr. DG macrumors regular

    Mr. DG

    Joined:
    Jan 16, 2006
    #16
    Yep its pretty crazy. My guess is this was put in to help with battery life, but somehow it affects thge MBP when plugged in too. I Dont know if the 17" has this issue or not, but the core due imac appears not to.

    @ kkapoor: try doing something else processor intensive, maybe rip a DVD or something at the same time as trying to watch 1080p, that might work (it'll jack up the CPU).
     
  16. MacsRgr8 macrumors 604

    MacsRgr8

    Joined:
    Sep 8, 2002
    Location:
    The Netherlands
    #17
    When playing the video, could you open up Terminal, and type "top -ocpu"?

    This will display the cpu load, where most cpu load will be on top (which should be the QuickTime player).

    If the QuickTime player shows cpu load > 100 %, then it does utilize the 2nd core.
    If it stays below 100 %, but the framerates drop below 24 fps, then somehow the 2nd core is not used, while it should be.
     
  17. nylon thread starter macrumors 6502a

    nylon

    Joined:
    Oct 26, 2004
    #18

    I did the above while the MBP is plugged-in. Quicktime usage never goes above 85%. It hovers on average at about 75%. Total CPU usage never exceeds 50%. FPS between 12-14.

    If I half the resolution of the 1080p video by pressing Command + 0 the FPS jumps to 24 and the QT processor usage increases to above 100%. This is the strangest thing I have ever seen.
     

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