The VideoLAN Forums

Posted: **25 Aug 2022 21:00**

What is the cause?

(1) and (3) play just fine on my 2018 iPad Pro 3rd Gen and 2016 MBP Intel.

But, (2) only plays fine on my M1 MBA.

Playing (2) on my 2018 iPad Pro 3rd Gen and 2016 MBP Intel causes what I assume are dropped frames every 2-5 seconds usually, and every 10-30 seconds at best.

I am streaming this over my network from my NAS via plain HTTP or SMB or UPnP/DLNA.

But, the results are the same, despite setting network buffers to maximum on all of these protocols.

Here are the details of these files:

(1) Orphan.First.Kill.2022.2160p.WEB-DL.x265.10bit.SDR.DDP5.1-FLUX

Code: Select all

    Format : HEVC
    Format/Info : High Efficiency Video Coding
    Format profile : Main 10@L5@High
    Codec ID : V_MPEGH/ISO/HEVC
    Duration : 1 h 38 min
    Bit rate : 12.0 Mb/s
    Width : 3 840 pixels
    Height : 2 074 pixels
    Display aspect ratio : 1.85:1
    Frame rate mode : Constant
    Frame rate : 23.976 FPS
    Color space : YUV
    Chroma subsampling : 4:2:0
    Bit depth : 10 bits
    Bits/(Pixel*Frame) : 0.063
    Stream size : 8.27 GiB (95%)
    Default : No
    Forced : No
    Color range : Limited
    Color primaries : BT.709
    Transfer characteristics : BT.709
    Matrix coefficients : BT.709

(2) Orphan.First.Kill.2022.2160p.AMZN.WEB-DL.x265.10bit.HDR10Plus.DDP5.1-SMURF

Code: Select all

    Format : HEVC
    Format/Info : High Efficiency Video Coding
    Format profile : Main 10@L5@Main
    HDR format : SMPTE ST 2094 App 4, Version 1, HDR10+ Profile B compatible
    Codec ID : V_MPEGH/ISO/HEVC
    Duration : 1 h 38 min
    Bit rate : 14.9 Mb/s
    Width : 3 840 pixels
    Height : 2 080 pixels
    Display aspect ratio : 1.85:1
    Frame rate mode : Constant
    Frame rate : 23.976 (24000/1001) FPS
    Color space : YUV
    Chroma subsampling : 4:2:0
    Bit depth : 10 bits
    Bits/(Pixel*Frame) : 0.078
    Stream size : 10.3 GiB (96%)
    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 : 173 cd/m2
    Maximum Frame-Average Light Level : 60 cd/m2

(3) Top.Gun.Maverick.2022.IMAX.2160p.WEB-DL.x265.10bit.HDR.DDP5.1.Atmos-CM

Code: Select all

    Format : HEVC
    Format/Info : High Efficiency Video Coding
    Format profile : Main 10@L5@High
    HDR format : SMPTE ST 2086, HDR10 compatible
    Codec ID : V_MPEGH/ISO/HEVC
    Duration : 2 h 10 min
    Bit rate : 24.4 Mb/s
    Width : 3 840 pixels
    Height : 2 024 pixels
    Display aspect ratio : 1.897
    Frame rate mode : Constant
    Frame rate : 23.976 FPS
    Color space : YUV
    Chroma subsampling : 4:2:0 (Type 2)
    Bit depth : 10 bits
    Bits/(Pixel*Frame) : 0.131
    Stream size : 22.2 GiB (97%)
    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: 0.0050 cd/m2, max: 1000 cd/m2
    Maximum Content Light Level : 897 cd/m2
    Maximum Frame-Average Light Level : 497 cd/m2

Some tech specs that might help:

2018 iPad Pro 3rd Gen: https://support.apple.com/kb/SP785

2016 MBP Intel: https://support.apple.com/kb/SP748

M1 MBA: https://support.apple.com/kb/SP825

HDR MacBook information: https://support.apple.com/en-us/HT210980

HDR iPad/iPhone information: https://support.apple.com/en-us/HT211798

The VideoLAN Forums

Why do one of these files result in skipped/dropped frames and the others don't?

Why do one of these files result in skipped/dropped frames and the others don't?