MBA Rev B and 1080 video

Discussion in 'MacBook Air' started by alexglee, Mar 29, 2009.

  1. alexglee macrumors regular

    alexglee

    Joined:
    Oct 19, 2005
    Location:
    West coast
    #1
    Hi guys

    1.6ghz w/ 128 SSD running latest Leopard. I'm having issues with playing 1080 videos. Anyone having the same issues? Activity monitor shows processor is not using all it's umphhhhh, but it's still choppy on VLC. Any ideas?
     
  2. drjsway macrumors 6502a

    Joined:
    Jan 8, 2009
    #2
    Use PLEX. VLC sucks and cannot utilize multi-cores effectively.
     
  3. mhnajjar macrumors 6502a

    mhnajjar

    Joined:
    Mar 3, 2008
    #3
    Are you trying to play 1080 videos on a 720 screen? :rolleyes:

    I am not saying that it has anything to do with the resolution, but just wondering why!

    What format are you playing?
     
  4. tsubikiddo macrumors regular

    Joined:
    Mar 15, 2008
    Location:
    Melbourne, AUS
    #4
    I have a 1.6GHz/HDD MBA rev.B
    it plays my 1080 TV recordings fine
    sure the display heats up, but it is smooth and handling well
     
  5. alexglee thread starter macrumors regular

    alexglee

    Joined:
    Oct 19, 2005
    Location:
    West coast
    #5
    mhnajjar: I'm not sure if it is a 720 screen. What is the Air? It is a .mpg format but it is 1080.

    tsubikiddo: What program are you using to play the 1080 tv recordings? Are you encoding them or where are you getting them from? Maybe I have my settings a little different. Do you have a test file I can try?
     
  6. dudeitsjay macrumors regular

    Joined:
    Mar 26, 2009
    #6
    Screen is technically 800p on the air, so it can't really run 1080p; The MBA will max out at 800. But, douchey technical pointing aside, mine runes 1080p format files fine on VLC. I'd check your temperatures using iStats and take a look at the coolbook thread here. My guess is the cpus are getting hot and being forced to downclock.
     
  7. McGilli macrumors 6502

    Joined:
    Nov 11, 2008
    #7
    Unless you are outputting to a tv/monitor with a resolution of 1080x1920 then just download the 720p video files if you are playing them on the MBA screen - they will look great and have less chance of stuttering.
     
  8. alexglee thread starter macrumors regular

    alexglee

    Joined:
    Oct 19, 2005
    Location:
    West coast
    #8
    Mine sits at 64 degrees. Is this good or bad? What shoudl the temperature be?
     
  9. dudeitsjay macrumors regular

    Joined:
    Mar 26, 2009
    #9
    64 is amazing lol. I reapplied thermal and downvolted with quickbooks and am barely getting 64 cool.
     
  10. jjahshik32 macrumors 603

    Joined:
    Sep 4, 2006
    #10
    MBAs are not even 720p displays. 1680x1050 is what I believe displays 720p.
     
  11. mhnajjar macrumors 6502a

    mhnajjar

    Joined:
    Mar 3, 2008
    #11
    I believe that is wrong jjahshik32.

    1920x1080 is 1080p while 1920x1200 has more pixels but yet NOT 1200p since there is no such thing!

    Therefore, the MBA being 1280x800 should be a 720p regardless of those extra pixels.

    Correct me if I am wrong but 800 vs. 720 is ratio 16:10 vs. 16:9 that is it due to those extra pixels but still 720p not 800p.
     
  12. darrellishere macrumors 6502

    Joined:
    Jul 13, 2007
    #12
    It seems like the macbook air cannot play sertain 1080p files.

    Usually torrents, played through VLC and .mkv files.

    It can play apple quicktime 1080p files no problem, as apple have activated GPU offloading with these apple created 1080p files.

    I tried coolbook to stop the throttleing of the cpu, but it did'nt solve the problem completely.

    I assume its because the chips are running under 2GHz a requirement for most HD.
     
  13. tsubikiddo macrumors regular

    Joined:
    Mar 15, 2008
    Location:
    Melbourne, AUS
    #13
    I have a Win machine with AverMedia HC-81 tvtuner, I record shows in their native resolution in their original format using AverMediaCenter

    on Air, QuickTime reckons these recordings are not video file and refuses to play, but VLC opens it and play the recordings smoothly

    fyi, 720p res: 1280x720
    1080p: 1920x1080 (16:9) and 1920x1200 (16:10, Sony were on this one when they reslease PS3, and they branded it 'Full-HD', there isn't such a thing at all)


    p stands for progressive scan
    i stands for interlace
     
  14. Brooklyn8 macrumors member

    Brooklyn8

    Joined:
    Jan 3, 2009
    #14
    You are wasting power and space playing 1080p videos on your macbooks air's screen, since when playing a 16:9 video it is using 1280x720 pixels on your screen 1280x800 screen. (hence the black bars at the top and bottom).

    Only if you have a 1080p (or 1920x1080 resolution) NATIVE(important) monitor or TV then is it worth while to have the 1080p video.

    As said before:

    1280x720 = 720p
    1920x1080 = 1080p

    Where do you think they got those numbers from ???:p
     
  15. dudeitsjay macrumors regular

    Joined:
    Mar 26, 2009
    #15
    Full-HD has been accepted by industry standards to translate to 1080p. It was a terminology created to divide the HD subcategories of 720p, 1080i, and 1080p. So, there is such a thing if you go by industrial commercialized jargon. What's the average consumer going to care for a difference of 720p and 1080p if both say HD. Bring in Full-HD and you got yourself some easy ways to differentiate the odds and shine.
    http://news.digitaltrends.com/talk-back/207/full-hd-hip-or-hype

    You're right if the clip is formatted to 16:9. Then it shows 720p pixelations. 16:10s would show 800p pixelations. But pretty much all clips are set to 16:9 format so yea...

    Also, sorry I misread you OP. 64C idling is high. With the coolbook and thermalpaste reapp, I idle around 50C and load around 64C+. On load, I'm guessing you easily reach 79C and go upwards close to 90C. If you experience stuttering during these temperatures, that means your 2nd cpu core is either being shut off, or your cores are being downclocked. Only solution is coolbook or thermal or chillpad or a mix of the three. See if this is the case: run hd and keep an eye on your temps using iStats. After the fixes, I haven't had a stutter yet =D.
     
  16. jjahshik32 macrumors 603

    Joined:
    Sep 4, 2006
    #16
    I guess if my mac mini plays 1080p movies just fine on my 40" Sony Bravia XBR6 then the mba shouldnt have any problems either.

    Similar specs and same GPU.
     

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