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Why UHD Blu-rays aren’t actually 4K

Discussion in 'Blu-ray and UHD' started by PaulGo, Jun 20, 2019.

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  1. Robert Crawford

    Robert Crawford Moderator
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    I'm glad it did as it looks better than the Blu-ray.
     
  2. Message #42 of 55 Jun 24, 2019
    Last edited: Jun 25, 2019
    Robert Crawford

    Robert Crawford Moderator
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    Trust me, I've done several comparisons and I couldn't tell for the most part. Initially, I was in the "only buy" 4K native club until I started experimenting around and found I couldn't really tell the difference between non-4K native and 4K native discs. Perhaps, those with larger than my 65" OLED could see the differences more easily.
     
  3. Lord Dalek

    Lord Dalek Producer

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    You know what's overkill? Toy Story. That was actually rendered at LESS than 1920x1080 (actually 1536x922!) in 1994-95. So even the regular blu-ray is an upscale!
     
  4. owen35

    owen35 Stunt Coordinator

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    More than likely I misunderstood what the person was saying, but once a film is scanned at 4K, those digital files are then used for color grading, etc., and then finally exported for disc. The production house would continue to work with those 4k files, not smaller files to expedite the process and reduce render time, correct?
     
  5. David Norman

    David Norman Producer

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    And yet most people who have seen it have been impressed with the improvement over the BD and 3DBD. Much of that may be related to HDR, some of it just a better encode, but overkill to me means 4K for the sake of 4K with no upside
     
  6. Worth

    Worth Producer

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    Which just goes to show how unimportant resolution really is.
     
  7. Worth

    Worth Producer

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    A 4K scan is the first step to creating a new, digital 4K master. So the 35mm negative is scanned at 4K, then cleaned up, colour graded etc. to create a 4K master. That is then used as the source for 4K and 2K DCPs for theatrical presentations, UHD discs and blu-rays, DVDs, digital sales and rentals, television, streaming, and so on.
     
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  8. Wayne_j

    Wayne_j Cinematographer

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  9. Michel_Hafner

    Michel_Hafner Screenwriter

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    No it isn't. If it were so we would all be still happy with VHS.
     
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  10. Mike2001

    Mike2001 Supporting Actor

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    The very first disc I purchased in 4K UHD back in the day was Life of Pi. It falls in the “fake” side on that obnoxious website. When I bought it, I did A/B comparisons with the Blu-ray where I synced them up on two different players (Oppo 103 for the Blu-ray and early Samsung for the 4K, watching on an early LG 65” OLED) and the differences were immediately obvious in the opening shots of the zoo. Not only in respect to HDR, where the deeper colors on the 4K made the Blu-ray appear flat and lifeless, but also in resolution. There is a scene that pans across tree branches against a sky background where the improvement in resolution was obvious. So, right from the start, I was never too concerned about that “real” vs “fake” distinction because “fake” still offered great improvement.
     
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  11. Brian Husar

    Brian Husar Second Unit

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    The problem is, and this is a problem with Disney and Fox and even Sony, if you want the Dolby Atmos track, you have to get the new 4k disc as Disney never puts an Atmos track on the blu rays, only the 4K blu rays.
     
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  12. Todd Erwin

    Todd Erwin Producer
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    The 4K disc was also mastered at a much higher bitrate using a much more efficient codec, so much more detail from the DI is likely to be retained than on the Blu-ray.
     
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  13. TJPC

    TJPC Producer

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    I hate to bring up an old whine, but the only way or reason to watch this movie is in its spectacular 3D version!
     
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  14. Stephen_J_H

    Stephen_J_H All Things Film Junkie

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    As a post note to this, the companies that are good for putting Atmos or DTS:X on non-4K titles are Warner and Universal, with the sole caveat that for whatever reason, Warner refuses to put Atmos on its 3D discs, which is ironic considering they did it early on and released some impressive tracks. Mad Max: Fury Road comes to mind.
     
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  15. Brian Husar

    Brian Husar Second Unit

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    Paramount is pretty good as well with putting the Atmos track of atleast newer movies on Blu ray.
     

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