rMBP vs Mac Pro video conversion?

Discussion in 'MacBook Pro' started by Crzyrio, Jul 3, 2013.

  1. Crzyrio macrumors 65816

    Joined:
    Jul 6, 2010
    #1
    Hey,

    I understand they are two completely different categories but what would be the speed difference in a regular Handbrake conversion?

    The reason I ask is because I will have access to a MacPro soon while owning a rMBP.


    The Macpro will require some travel time and booking in advanced so would be nice to know in advanced the benefits if any :)

    Thanks
    Rio
     
  2. CaptHenryMorgan macrumors regular

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    Apr 27, 2013
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    The District
    #2
    What software are you using? What are the specs of the Mac Pro? Does it have an SSD? RAID? Fibre?

    Depending on what software you're using (FCP 7 vs. Premiere vs. MPEG Streamclip), your performance will very greatly as some programs see 2 cores of an 8 core machine, some see all 8.

    Transcoding from and to an SSD is much faster than transcoding from and to a spinning drive.

    Lots of factors.
     
  3. Crzyrio thread starter macrumors 65816

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    Jul 6, 2010
    #3
    Hey Sorry,

    Lets just say I use Handbrake, it uses as many cores as it can get, and the MAC PRO will have a Standard HD.

    Mac Pro specs -> QUad Core Intel Xeon 3.2Ghz. and the rMBP is the standard base model
     
  4. miclar1 macrumors newbie

    Joined:
    Jan 12, 2013
    #4
    rMBP Handbrake conversion

    Using Handbrake (normal preset) on my 15" rMBP I've just converted a 1.42 GB .avi file to .m4v in about 2.5 minutes while surfing in Safari.
     
  5. GermanyChris macrumors 601

    GermanyChris

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    #5
    your going to get some extra speed because you're not writing to the disk your reading from I assume. My quad with a 3570 which has a QPI than the 3565 Apple uses has a GB of 11,300ish

    I wouldn't go out of my way to use the MP but it'll be cooler and quieter doing the job
     
  6. Crzyrio thread starter macrumors 65816

    Joined:
    Jul 6, 2010
    #6
    Thanks! That is fairly quick

    You have lost me, I am not sure I understand.

    Would you be able to convert a small file and tell me how long it takes and size of file? just to get an approximation
     
  7. GermanyChris macrumors 601

    GermanyChris

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    #7
    I can't remember how long it takes to handbrake stuff anymore.

    The two computers are of similar power it will take as long to do it on a quad MP as it will on your MBP. The extra power of you MBP will be countered by having a scratch disk.
     
  8. Crzyrio thread starter macrumors 65816

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    Jul 6, 2010
    #8
    Thanks for the reply!

    Probably wont be worth my time doing the mac pro then
     
  9. priitv8 macrumors 68020

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    #9
    On my QC-i7 rMBP I can HandBrake a 1080p 10Mbps mkv in about realtime. I.e. it converts at about 24-28fps, 1h of movie in about 1h.
     
  10. shortcut3d macrumors 65816

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    Aug 24, 2011
    #10
    My old QC-i7 2011 15" MBP converted a 1080p mkv to 1080p m4v using Handbrake at 18-20fps.

    I'm shocked the new Haswell DC-i7 13" rMBP did the same file at 8-11fps. I even tried Bootcamp using QuickSync and it did 11-13fps.

    Am I doing something wrong?
     
  11. nateo200 macrumors 68030

    nateo200

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    #11
    Dual core sucks.
     
  12. johnnylarue macrumors 6502a

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    #12
    This tends to be where you'll feel the dual-coreness of your dual-core processor the most, unfortunately.
     
  13. Swampus macrumors 6502

    Swampus

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    #13
    No, that looks about right. With Handbrake, you can pretty much do the math based on the number of cores. My quad will do the same type of encode at about 24fps. Drop it down to two cores, and it's about 12fps. At three cores (good balance between performance and temperature), it's about 18fps.

    At least this is true for 1080p or any work that would normally peg every core to 100%. If you're just dropping something down to iPod resolution, one core is usually plenty.
     
  14. shortcut3d macrumors 65816

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    Aug 24, 2011
    #14
    The 15" rMBP was just too big for the wife, even though it was lighter than the 15" MBP. Sad.

    I was hoping that QuickSync would have a huge advantage. Unfortunately, for 1080p encodes it seems to just shifts the workload from CPU to iGPU. This would be great if QuickSync was available in OSX where all my productivity apps are. In bootcamp, its a single purpose encoding machine.

    I'm interested to know more experiences with QuickSync on Haswell.
     
  15. Celedral macrumors 6502

    Celedral

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    Los Angeles
    #15
    Your MBPR will be extremely toasty when encoding. I've been using mine for editing 4k video and it gets extremely hot. It reaches 93c - 100c before the fan starts kicking in. I have to manually set the fans using SMCfancontrol or it'll stay at 90c to 105c. I'm not sure how accurate the readings are, but I assume they are using the same sensor info from the system and should be within 2-3c difference.

    Get a MP if you plan on doing it long term.
     
  16. Swampus macrumors 6502

    Swampus

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    #16
    Sorry, I glossed over the word "bootcamp" in the previous post and thought you were expecting a QuickSync boost in OSX. You're right, though. You should be getting better. Are you using a nightly build of HandBrake? I don't have Windows installed in any of my Macs, so I'm probably not going to be much help. Maybe a driver issue?

    ----------

    Great for professionals, but a Mac Pro is overkill for handbrake.

    A $400 mATX build with an i5 Quad would be plenty for a dedicated HandBrake machine. Windows would provide the desired QuickSync and OpenCL acceleration and probably give better frame rates than a Mac Pro anyway. Of course, HandBrake also runs on Linux, but no QuickSync.

    But yes, on a MBP, handbrake is a compromise between heat and speed. Again, on my Quad, three cores seems to be the sweet spot. I have to wait an hour for something that I could do in 45 minutes if running at full bore, but I'm not on the clock when doing this and just don't care that much. And it keeps the temps in the low to mid 80s.
     
  17. shortcut3d macrumors 65816

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    Aug 24, 2011
    #17
    I was using the nightly build and QuickSync option enabled in the preferences.

    My previous Handbrake results were comparing Bootcamp performance. I just did an encode under OSX and the speeds (18-20fps) are much closer to the older 2011 QC MBP. Once the processor is hot things slow down to the 10fps range.

    Does retina scaling impact performance?

    I also notice fps are higher coming out of waking the display, then drop.
     
  18. priitv8 macrumors 68020

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    #18

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