Imac 27" & 2160 UHD files

Discussion in 'iMac' started by frogboy2727, Oct 28, 2017.

  1. frogboy2727 macrumors newbie

    Dec 10, 2008
    I've got a 2017 27" I5 3.8, 32GB, 580 video. I've got some 2160 UHD files (.mkv) downloaded. I've been attempting to play them, via VLC, but, every file is way too laggy/distorted. Does anyone have any suggestions, as to whether/or not, I can use these files. All my other 1080p files (.mkv) have no issues. Any suggestions/solutions would be greatly appreciated. Thanks ...
  2. tn-xyz macrumors regular


    Sep 13, 2017
    encoded using x265?
    try another player like mpv or elmedia and report back.
  3. frogboy2727 thread starter macrumors newbie

    Dec 10, 2008
    I will try another player. I'm not sure of how to determine how the files are encoded.
  4. EugW macrumors 603


    Jun 18, 2017
    Try with IINA.

    Load the file in vlc and check:

    vlc --> Window --> Media Information --> codec details

    If it is h.265, that's your problem. vlc is a poor h.265 player. IINA is much, much better. And QuickTime is the best if the file is compatible QuickTime, but .mkv files are not supported by QuickTime. Furthermore QuickTime has other picky requirements.
  5. frogboy2727 thread starter macrumors newbie

    Dec 10, 2008
    Thanks for the information. I currently keep the iMac at work. It's a Christmas present for us. I'm slowly putting it together. Just finished adding my Windows stuff. I'll return with my findings. Much appreciated, to everyone.
  6. frogboy2727 thread starter macrumors newbie

    Dec 10, 2008
    An update .. Most of my downloaded UHD movies have the following Video Codec - MPEG-H Part2/HEVC (H.265) (HEVC), 3840 x 2160. The Audio Codecs vary. But, once I installed IINA, the movies play perfectly, without any dropouts, stuttering, or tearing. Many thanks to everyone, for their suggestions.

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5 October 28, 2017