Other 4K playback extremely choppy

Discussion in 'iPhone' started by 212rikanmofo, Sep 29, 2018.

  1. 212rikanmofo macrumors 68000

    Jan 31, 2003
    i tried doing a test by recording using 4K at 60fps. When viewed on the iPhone Xs Max it plays smoothly. However when air playing or copying the file to my computer and viewing using VLC I noticed that it’s pretty choppy. Any ideas on why?
  2. akash.nu macrumors 604


    May 26, 2016
    Is it an old computer?
  3. UKapple73 macrumors regular

    Sep 13, 2014
    Your PC isn’t fast enough to decode 4K. It’s very intensive on processors
  4. 212rikanmofo thread starter macrumors 68000

    Jan 31, 2003
    It’s an i7 with a GTX 1080. How can that be slow?
  5. doboy macrumors 68020

    Jul 6, 2007
  6. maxsquared macrumors regular

    Jun 27, 2009
    Depends. If you have a MacBook post 2016 then use QuickTime. As 4k60p use hevc and VLC isn’t very good at decoding it, but QuickTime is.
  7. 212rikanmofo thread starter macrumors 68000

    Jan 31, 2003
    I have an early 2015 12" MacBook and a late 2013 iMac. Would that work? But how come playback is smooth when I've seen other people post their 4k video taken with the new iPhone Xs on Youtube?
  8. treyhunnid macrumors regular


    Sep 13, 2018
    It’s your vlc that’s choppy. Not ur processor. Try another video player that does hevc decoding Like QuickTime. Or change the encoding type ur phone camera settings and then record a new video and try it on vlc again. Apples got their own in house compression it uses for 4K.
    --- Post Merged, Sep 30, 2018 ---
    Youtube reencodes it with vp9 codec.

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7 September 29, 2018