HEVC not playable on my LG Ultra HD TV

[klode]

I have a LG 55UH850V ULTRA HD 3D Slim TV.
Among the features is the ability to play MKV videos with the HEVC codec. There are currently two broad types of HEVC: 8-bit (SDR) and 10-bit (HDR).
By downloading videos from some sites that display both 8-bit and 10-bit HEVC videos, both videos can be played on the TV, either via an external hard drive or via DLNA (Windows 10 File Sharing).

This TV, however, does not play some videos, although they can be viewed on the PC.

I want to display the MediaInfo data for the following files:

https://pastebin.com/Yt2NLTM2 - HEVC 4K SDR 30fps - WORKS!
https://pastebin.com/GisFUGZu - HEVC 4K HDR 30fps - WORKS!
https://pastebin.com/Z0baW1kw - HEVC 1080p SDR 23,976fps - DOES NOT WORKS!!!!

I can't find the problem where my TV refuses to play a file like this.
Can anyone solve this mystery for me?

[ProWo]

1) HEVC 4K SDR 30fps - WORKS!
2) HEVC 4K HDR 30fps - WORKS!
3) HEVC 1080p SDR 23,976fps - DOES NOT WORKS!!!!

3) is a failed HDR-to-SDR conversion in which all HDR metadata has been preserved.

HDR format : SMPTE ST 2086, HDR10 compatible
Mastering display color primaries : Display P3
Mastering display luminance : min: 0.0000 cd/m2, max: 1000 cd/m2
Maximum Content Light Level : 1000
MaxCLL_Original : 1000 cd/m2

Your TV should still be able to play the video, though.
I suspect that Profile Level 4 is the problem.
Change the level to 3.1 or 4.1.

You can do this with Clever FFmpeg-GUI.
Load your HEVC 1080p SDR 23.976 fps MKV file, click “Lossless Changes,” check “Change Profile Level,” select 3.1 at “New level” and click “Change.”
A new video with profile level 3.1 is created in streamcopy (fast, without recode, no quality loss).
Test the new video on your TV.

[klode]

1) HEVC 4K SDR 30fps - WORKS!
2) HEVC 4K HDR 30fps - WORKS!
3) HEVC 1080p SDR 23,976fps - DOES NOT WORKS!!!!

3) is a failed HDR-to-SDR conversion in which all HDR metadata has been preserved.

HDR format : SMPTE ST 2086, HDR10 compatible
Mastering display color primaries : Display P3
Mastering display luminance : min: 0.0000 cd/m2, max: 1000 cd/m2
Maximum Content Light Level : 1000
MaxCLL_Original : 1000 cd/m2

Your TV should still be able to play the video, though.
I suspect that Profile Level 4 is the problem.
Change the level to 3.1 or 4.1.

You can do this with Clever FFmpeg-GUI.
Load your HEVC 1080p SDR 23.976 fps MKV file, click “Lossless Changes,” check “Change Profile Level,” select 3.1 at “New level” and click “Change.”
A new video with profile level 3.1 is created in streamcopy (fast, without recode, no quality loss).
Test the new video on your TV.

Thanks for your suggestion. I-ll try ASAP. Let me check.

[klode]

There is the new result from MediaInfo:

https://pastebin.com/YXvULnf9

However I've got the same error. Should I need to correct the ColorSpace too?

[ProWo]

There is the new result from MediaInfo:

https://pastebin.com/YXvULnf9

However I've got the same error. Should I need to correct the ColorSpace too?

Have you tried 3.1 as well?
The color space is fine (BT709), but there's some leftover HDR metadata that you can't remove without re-encoding.

[klode]

Yes I've tried 3.1 too, same issue.
But I wouldn't re-encode the file... Is there no solution to remove that metadata?

[ProWo]

Yes I've tried 3.1 too, same issue.
But I wouldn't re-encode the file... Is there no solution to remove that metadata?

You could try the following:

ffmpeg -i input.mkv -c copy -bsf:v sidedata=delete=MASTERING_DISPLAY_METADATA,sidedata=delete=CONTENT_LIGHT_LEVEL output.mkv

[Gloster]

Also you can check the video-file by a ffmpeg frame analysis :

ffmpeg -i "YourVideo.mp4" -f null - 2>FrameAnalysis.txt

I use a Linux system and does not know whether the command must be adapted to your system.
But you get a complete framing analysis with the respective timestamp.
If no error you will get a output like this :

ffmpeg version 8.0 Copyright (c) 2000-2025 the FFmpeg developers
  built with gcc 13 (Ubuntu 13.3.0-6ubuntu2~24.04.1)
  configuration: --enable-libvmaf --enable-gpl --enable-libx264 --enable-libx265 --enable-nonfree --enable-openssl --enable-hardcoded-tables --enable-libaom --enable-libass --enable-libfdk-aac --enable-libmp3lame --enable-libfreetype --enable-libvorbis --enable-libopus --enable-libvpx --enable-version3 --enable-libbs2b --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libfontconfig --enable-libfribidi --enable-libgme --enable-libharfbuzz --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libwebp --enable-libxml2 --enable-libxvid --enable-libzimg --enable-openal --enable-opengl --enable-libvpl --disable-libmfx --enable-libdc1394 --enable-libdrm --enable-frei0r --enable-libbluray --enable-libpulse --enable-librabbitmq --enable-librist --enable-libssh --enable-libsvtav1 --enable-lv2 --enable-sdl2 --enable-libplacebo --enable-librav1e --enable-librsvg --enable-libjxl --enable-shared --enable-libsvtav1
  libavutil      60.  8.100 / 60.  8.100
  libavcodec     62. 11.100 / 62. 11.100
  libavformat    62.  3.100 / 62.  3.100
  libavdevice    62.  1.100 / 62.  1.100
  libavfilter    11.  4.100 / 11.  4.100
  libswscale      9.  1.100 /  9.  1.100
  libswresample   6.  1.100 /  6.  1.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Die Tigerin.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf62.3.100
  Duration: 01:24:52.29, start: 0.000000, bitrate: 842 kb/s
  Stream #0:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, smpte170m/bt470bg/bt709, progressive), 640x480 [SAR 1:1 DAR 4:3], 707 kb/s, 25 fps, 25 tbr, 12800 tbn (default)
    Metadata:
      handler_name    : VideoHandler
      vendor_id       : [0][0][0][0]
  Stream #0:1[0x2](und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
      vendor_id       : [0][0][0][0]
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> wrapped_avframe (native))
  Stream #0:1 -> #0:1 (aac (native) -> pcm_s16le (native))
Press [q] to stop, [?] for help
Output #0, null, to 'pipe:':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf62.3.100
  Stream #0:0(und): Video: wrapped_avframe, yuv420p(tv, smpte170m/bt470bg/bt709, progressive), 640x480 [SAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 25 fps, 25 tbn (default)
    Metadata:
      encoder         : Lavc62.11.100 wrapped_avframe
      handler_name    : VideoHandler
      vendor_id       : [0][0][0][0]
  Stream #0:1(und): Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s (default)
    Metadata:
      encoder         : Lavc62.11.100 pcm_s16le
      handler_name    : SoundHandler
      vendor_id       : [0][0][0][0]
frame=  370 fps=0.0 q=-0.0 size=N/A time=00:00:14.80 bitrate=N/A speed=29.6x elapsed=0:00:00.50    
frame=  731 fps=731 q=-0.0 size=N/A time=00:00:29.24 bitrate=N/A speed=29.2x elapsed=0:00:01.00    
frame= 1094 fps=729 q=-0.0 size=N/A time=00:00:43.76 bitrate=N/A speed=29.2x elapsed=0:00:01.50    
frame= 1486 fps=743 q=-0.0 size=N/A time=00:00:59.44 bitrate=N/A speed=29.7x elapsed=0:00:02.00    
frame= 1898 fps=759 q=-0.0 size=N/A time=00:01:15.92 bitrate=N/A speed=30.4x elapsed=0:00:02.50    
frame= 2338 fps=779 q=-0.0 size=N/A time=00:01:33.52 bitrate=N/A speed=31.2x elapsed=0:00:03.00    
frame= 2724 fps=778 q=-0.0 size=N/A time=00:01:48.96 bitrate=N/A speed=31.1x elapsed=0:00:03.50    
frame= 3115 fps=778 q=-0.0 size=N/A time=00:02:04.60 bitrate=N/A speed=31.1x elapsed=0:00:04.00