Resolved cMP 2010, is anyone else struggling with 4k video playback?

Discussion in 'Mac Pro' started by LAHegarty, Jul 5, 2017.

  1. LAHegarty macrumors member

    LAHegarty

    Joined:
    Aug 17, 2013
    Location:
    York, UK.
    #1
    I have a Mac Pro with dual x5670's, 64Gb RAM 1333Mhz, macOS 10.12

    Some 4k videos are playing fine, like YouTube, etc but some (not all) of my downloaded 4k videos (h264) are not playing well at all, the sound will not sync or the video is choppy, etc. It appears to be only with larger video files 20Gb plus.

    Anyone else had this problem, is the hardware just too old for 4k?
    I use VLC and have tried over players also.
     
  2. SoyCapitanSoyCapitan, Jul 5, 2017
    Last edited: Jul 6, 2017

    SoyCapitanSoyCapitan macrumors 68040

    SoyCapitanSoyCapitan

    Joined:
    Jul 4, 2015
    #2
    Depends on the GPU, drivers, CPU, bit rate and colour depth. We discover from time to time that Mac graphics drivers don't have full graphics acceleration enabled, which means the video decode will be handled by CPU. Well some people have very old CPUs.

    But this problem is still persisting due to Apple's negligence. In the latest High Sierra beta full hardware decoding support for h265 HEVC is only for Kabylake CPU and there is no GPU assist even with the latest graphics.

    That's deeply unfair because a Skylake with a decent graphics card can easily decode 10bit 4K HEVC on Windows 10. In fact, here's a demo I made showing smooth playback, smooth scrubbing and smooth resizing (while the computer was mining)

    6700K with Radeon RX 580

    Use this video file

    http://4kmedia.org/sony-bravia-uhd-hdr-4k-demo/

     
  3. CapnDavey macrumors 6502

    CapnDavey

    Joined:
    Apr 11, 2015
    #3
    I've never had an issue with 4k video on my 4,1 video card 2 gig GTX 680
     
  4. LAHegarty thread starter macrumors member

    LAHegarty

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    Aug 17, 2013
    Location:
    York, UK.
    #4
  5. h9826790, Jul 6, 2017
    Last edited: Jul 6, 2017

    h9826790 macrumors 604

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #5
    Both VLC and IINA can play the video smoothly. However, IINA do better in all areas. iStat shows the screen refresh rate always > 24FPS.

    IINA stat clearly shows the video is playing at around the native 23.976 FPS
    Screen Shot 2017-07-07 at 01.11.14 copy.jpg

    For VLC, there are 14FPS frame drop (not smooth), which happened at the very 1st 1-2 second when starting to play the video. After that, the number is locked and no more frame drop (smooth). Furthermore, VLC seems can't handle 10bit colour properly. And audio also not smooth in VLC.
    Screen Shot 2017-07-07 at 01.16.58 copy.jpg
     
  6. SoyCapitanSoyCapitan macrumors 68040

    SoyCapitanSoyCapitan

    Joined:
    Jul 4, 2015
    #6
    Ah it's 10 bit colour, which isn't supported for decode on those processors and very likely the GPU drivers too. On Windows you will have no issue but macOS basically has **** support for any universal standards of decoding, encoding and playback. Loses to Windows very badly, not just a little.

    Blame Apple for treating users like dirt.
     
  7. LAHegarty thread starter macrumors member

    LAHegarty

    Joined:
    Aug 17, 2013
    Location:
    York, UK.
    #7
    h9826790 Thank you, life saver! I was ready to buy something a little newer, now I can keep my cMP.

    SoyCapitanSoyCapitan Yes, apple support of older hardware is horrendous.

    I will mark this as solved, thank you, everyone.

    To anyone having problems playing 4k video on there cMP you should try IINA player.
    https://lhc70000.github.io/iina/

    I guess VLC is old hat now, farewell VLC, it's been real. (At least for 4k content, anyway)
     
  8. steveOooo macrumors 6502a

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    Jun 30, 2008
    Location:
    UK
    #8
    I find divx player plays hevc well on my MacPro so try that also (all free)
     
  9. 1024724 macrumors member

    1024724

    Joined:
    Apr 4, 2016
    #9
    Never heard of this. Only ever used VLC. I Don't want to make any wrong conclusions but I gather you like it better than VLC?
     
  10. LAHegarty thread starter macrumors member

    LAHegarty

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    Aug 17, 2013
    Location:
    York, UK.
    #10
    steveOooo I tried the DivX player, 5KPlayer & Cisdem VideoPlayer, as well as VLC none of them played the above 4k video file correctly.
     
  11. Flint Ironstag, Jul 6, 2017
    Last edited: Jul 6, 2017

    Flint Ironstag macrumors 6502a

    Flint Ironstag

    Joined:
    Dec 1, 2013
    Location:
    Houston, TX USA
    #11
    SoyCapitanSoyCapitan, that is a really useful site, thanks! Every so often I post looking for places to download some eye candy to have playing in the background. Got any more?

    ...aaaaand can't play any of those files on the nMP in sig. Off to try this new media player now!

    data point: couldn't scrub sample footage smoothly. Playback stuttered for the 1st second or 2 then settled in. [edit for clarity] this is in VLC.

    [edit 2]

    IINA flawlessly played the demos SoyCapitan provided.

    Good playback on LAHegarty's clip as well. Scrubbing was still not smooth, however. That's crazy in a bad way.

    Good thread, learned a bunch of stuff. Thanks All!
     
  12. LAHegarty thread starter macrumors member

    LAHegarty

    Joined:
    Aug 17, 2013
    Location:
    York, UK.
    #12
    1024724 I've been using it for a few days now & I personly think it's a better player than VLC, VLC has become stagnant & was never build to be used with macOS whereby IINA has been build for macOS, it's a modern player with a modern feel, 1 click dragging, right click play/pause feature, playback of all 4k video I have tried so far, use arrow keys to push back or forward 5 seconds & an overall nicer user interface.

    I like this player a lot.
     
  13. 1024724 macrumors member

    1024724

    Joined:
    Apr 4, 2016
    #13
    Me too, very smooth playback and honestly, seeking has been working great across multiple file types, no hanging so far. One thing I cannot stand about it (and mostly every other player) is that it doesn't allow for a set window size. Always resizing with every video... Really wish I could keep the window permanently sized, bit of a freak about window locations.
     
  14. LAHegarty thread starter macrumors member

    LAHegarty

    Joined:
    Aug 17, 2013
    Location:
    York, UK.
    #14
    That would be a nice feature and one that I've thought about in the past myself, I guess it doesn't bother me too much now but I know where you are coming from.

    It's defiantly a nice player.
     

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