Conversion Times

Discussion in 'Mac Pro' started by OldStyleBob, Nov 20, 2008.

  1. OldStyleBob macrumors newbie

    Joined:
    Nov 20, 2008
    #1
    Hello, Im new to the Apple scene and am doing my research on buying a mac pro. One of the things I will be doing on it will be converting avi's to Apple TV format(large collection) and I guess thats what will decide for me if I should get a 4 or 8 core. Are the conversion times significantly lower when converting, and I guess for that matter ripping DVD content? if the 4 extra cores add alot then it looks like thats the way I wanna go but I am unsure. Thanks in advance and I hope to be joining in on alot of discussion in the future!

    Bob
     
  2. djjclark macrumors regular

    Joined:
    Feb 17, 2008
    #2
    Depends if your converting software is multithreaded and supports multiple processors. Some processes are very efficient so multiple cores will provide a linear increase while others not so much.
     
  3. Chaos123x macrumors 68000

    Joined:
    Jul 8, 2008
    #3
    Use Compresser just set a quick cluster in Qmaster that way you can use all 8 cores instead of just the one. It literally makes it 8 times faster!
     
  4. Mackilroy macrumors 68040

    Mackilroy

    Joined:
    Jun 29, 2006
    #4
    Eight cores will be faster than four cores (by far) but I don't know if HandBrake utilizes more than four – but still, you can run two instances of HB and have them both use four cores apiece. No idea how many MacTheRipper uses, but MTR only creates a direct copy of the DVD, not a file playable by the ATV.
     
  5. OldStyleBob thread starter macrumors newbie

    Joined:
    Nov 20, 2008
    #5
    thanks for the responses, can anyone give me any examples of amount of time it takes per conversion of like a normal 700mb avi file? like how long does it take with a 4-core machine and 8-core machine? am I making sense? not enough coffee today:)
     
  6. LurchNC macrumors regular

    Joined:
    May 1, 2008
    #6
    Using Handbrake svn1797 (a beta) I'm getting 190-200fps on an 800 mb avi. Its 512x384 and 1:37 min long. I used 1200 kbps m4v file. Looks like it will take approx. 14-15 min.

    I'm getting all 8 cores pegged (93% in istat pro)

    When ripping dvds for the iPhone (480 x whatever and 700 kbps) I typically get 210-230 fps.

    These are h.264 btw. Also keep in mind if you need to de-interlace it will take up to twice as long depending on the methods used.
     
  7. wheezy macrumors 65816

    wheezy

    Joined:
    Apr 7, 2005
    Location:
    Alpine, UT
    #7
    I've only been ripping straight from DVD's or DVD image files on handbrake, but it's incredibly fast and does use all 8 cores. Recently I had two instances running on two different hard drives, one ripping from a file the other from the drive and it slowed down a little bit.

    Timewise - my Macbook 2Ghz C2D would rip a DVD at real time, 2hrs for a 2hour movie. Takes about 20 minutes on my 8 core. Image files (from MacThe Ripper etc) are about 25% faster than that.

    Find a refurb 8 core, it's about $100 more than a 4Core new. I bought a refurb and it's fantastic.
     

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