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  1. Member
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    I was given two files of the same movie. Both 2160p.
    The smaller one is HEVC.
    The larger one is AVC.
    Here are the the Mediainfo for both:
    HEVC
    Video
    ID : 1
    Format : HEVC
    Format/Info : High Efficiency Video Coding
    Format profile : Main 10@L6@High
    HDR format : SMPTE ST 2086, HDR10 compatible
    Codec ID : V_MPEGH/ISO/HEVC
    Duration : 3 h 28 min
    Bit rate : 17.3 Mb/s
    Width : 3 840 pixels
    Height : 2 080 pixels
    Display aspect ratio : 1.85:1
    Frame rate mode : Constant
    Frame rate : 24.000 FPS
    Color space : YUV
    Chroma subsampling : 4:2:0 (Type 2)
    Bit depth : 10 bits
    Bits/(Pixel*Frame) : 0.090
    Stream size : 25.1 GiB (98%)
    Language : English
    Default : Yes
    Forced : No
    Color range : Limited
    Color primaries : BT.2020
    Transfer characteristics : PQ
    Matrix coefficients : BT.2020 non-constant
    Mastering display color primaries : Display P3
    Mastering display luminance : min: 0.0001 cd/m2, max: 1000 cd/m2
    Maximum Content Light Level : 1014 cd/m2
    Maximum Frame-Average Light Level : 263 cd/m2

    AVC
    Video
    ID : 1
    Format : AVC
    Format/Info : Advanced Video Codec
    Format profile : High@L5.1
    Format settings : CABAC / 5 Ref Frames
    Format settings, CABAC : Yes
    Format settings, Reference frames : 5 frames
    Codec ID : V_MPEG4/ISO/AVC
    Duration : 3 h 29 min
    Bit rate : 46.1 Mb/s
    Width : 3 840 pixels
    Height : 2 076 pixels
    Display aspect ratio : 1.85:1
    Frame rate mode : Constant
    Frame rate : 24.000 FPS
    Color space : YUV
    Chroma subsampling : 4:2:0
    Bit depth : 8 bits
    Scan type : Progressive
    Bits/(Pixel*Frame) : 0.241
    Stream size : 67.5 GiB (97%)
    Writing library : x264 core 157 r2969 d4099dd
    Encoding settings : cabac=1 / ref=5 / deblock=1:-3:-3 / analyse=0x3:0x133 / me=umh / subme=10 / psy=1 / psy_rd=1.00:0.15 / mixed_ref=1 / me_range=48 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=0 / chroma_qp_offset=-3 / threads=24 / lookahead_threads=4 / sliced_threads=0 / nr=0 / decimate=0 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=8 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=24 / scenecut=40 / intra_refresh=0 / rc=crf / mbtree=0 / crf=20.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.30 / pb_ratio=1.20 / aq=3:0.80
    Language : English
    Default : Yes
    Forced : No

    I intend to play the movie on LG OLED 65".
    I admit I'm not familiar with most of the technical data above.
    Could someone advise me which of those two alternatives might give me a better picture? (whatever "better" means...)
    Thank you
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  2. aBigMeanie aedipuss's Avatar
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    "given two files of the same movie"

    you don't own it. that's piracy. don't ask for help. sorry.


    p.s. watch whichever one you prefer.
    --
    "a lot of people are better dead" - prisoner KSC2-303
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    But, but...it's, it's home movies of my nieces and nephews on family vacation...ummm...yeah, home movies!

    J/K...100% pegleg and eye patch stuff!
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  4. Member
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    The first is HDR while the second appears not to be.
    That could be an issue; I don't think HDR has all it's kinks worked out due to lack of standards.

    My TV has basic HDR10; sometimes it burns your eyes out - like looking at the sun.
    The literature talks about "speculative highlights" and "deep shadows" but reality is
    miles away from this
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  5. The AVC video probably has a little more detail detail. The first video is HDR and should have more dynamic range if you're set up to play HDR properly. It's up to you which looks better.
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  6. Member
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    Originally Posted by lingyi View Post
    But, but...it's, it's home movies of my nieces and nephews on family vacation...ummm...yeah, home movies!

    J/K...100% pegleg and eye patch stuff!
    Thanks. That's exactly the case. How did you guess?
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  7. Member
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    Thank you all.
    I'm still waiting for more answers based, if possible, on the Mediainfo data I quoted.
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  8. It's against forum rules to discuss pirated material. Ask where you got it from.
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    Originally Posted by butterw View Post
    It's against forum rules to discuss pirated material. Ask where you got it from.
    Why do you think it's pirated?
    1. Read my reply to lingyi
    2. Even if they were commercial movies, (which, of course, they're not), they might be older than the maximum period of copyright protection.
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  10. Originally Posted by Amitay View Post
    I'm still waiting for more answers based, if possible, on the Mediainfo data I quoted.
    There is no answer to your question. The numbers that MediaInfo reports are just properties of the video. They are not direct indicators of quality. The only way to say for sure which video looks better is to view them.
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    Originally Posted by jagabo View Post
    Originally Posted by Amitay View Post
    I'm still waiting for more answers based, if possible, on the Mediainfo data I quoted.
    There is no answer to your question. The numbers that MediaInfo reports are just properties of the video. They are not direct indicators of quality. The only way to say for sure which video looks better is to view them.
    Isn't there any relationship between bit rate and bytes per pixel and quality? (at least when the figures are far apart)
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  12. Originally Posted by Amitay View Post
    Isn't there any relationship between bit rate and bytes per pixel and quality? (at least when the figures are far apart)
    Yes, lower bitrates deliver lower quality. But it varies between codecs (even in the same family), the setting used, any filtering that was performed before encoding, the properties of the source video(s), etc.
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  13. Member
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    Originally Posted by jagabo View Post
    Originally Posted by Amitay View Post
    Isn't there any relationship between bit rate and bytes per pixel and quality? (at least when the figures are far apart)
    Yes, lower bitrates deliver lower quality. But it varies between codecs (even in the same family), the setting used, any filtering that was performed before encoding, the properties of the source video(s), etc.
    Sounds reasonable.
    Could you comment on bits per pixel?
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  14. Bits per pixel is a poor proxy of video quality.
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  15. Member
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    Originally Posted by jagabo View Post
    Bits per pixel is a poor proxy of video quality.
    Thanks, jagabo.
    I thought it was somehow connected to color fidelity or sharpness.
    But I admit my ignorance in those matters.
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  16. Originally Posted by Amitay View Post
    Originally Posted by jagabo View Post
    Bits per pixel is a poor proxy of video quality.
    Thanks, jagabo.
    I thought it was somehow connected to color fidelity or sharpness.
    But I admit my ignorance in those matters.
    It's a measure of how much the video has been compressed. Not how well it's been compressed.
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