scotty333 0 Posted January 1, 2023 Posted January 1, 2023 Hi, Having an issue with most but not all HEVC HDR videos. Some scenes are so dark you can only see some small light areas of video, on PC Windows, Android and Tizen. Same videos play fine on Media Player Classic - same PC. Have tried using SDR, and hardware/software transcoding - no difference. Screenshot and logs attached. Same issue when setting playback to 1080p. Odd thing is not all video is affected, but most. No issue with 1080P media (so far). Light scenes in same files are not as bad, but still much darker than they should be. Cheers embyserver.txt
Abobader 3464 Posted January 1, 2023 Posted January 1, 2023 Hello scotty333, ** This is an auto reply ** Please wait for someone from staff support or our members to reply to you. It's recommended to provide more info, as it explain in this thread: Thank you. Emby Team
GrimReaper 4739 Posted January 1, 2023 Posted January 1, 2023 Do you have tonemapping enabled when transcoding?
Luke 42077 Posted January 2, 2023 Posted January 2, 2023 Also was an ffmpeg log generated? Please attach that as well. Thanks.
scotty333 0 Posted January 2, 2023 Author Posted January 2, 2023 HDR Tone mapping is enabled (same result if on or off). No ffmeg log was generated when playing these files.
GrimReaper 4739 Posted January 2, 2023 Posted January 2, 2023 3 hours ago, scotty333 said: Same issue when setting playback to 1080p If you set quality to 1080p while playing 2160p file then yes, generally an ffmpeg log should have been created as it would require transcoding (though those resolution indicators are more of a guidance, Bitrate is determining factor there). The only thing that comes to mind is that's a low-bitrate item to begin with and you haven't lowered quality to the lower value than it is, can you post MediaInfo details for that item?
scotty333 0 Posted January 2, 2023 Author Posted January 2, 2023 Mediainfo below. Really odd it plays other HDR10 files perfectly, some just latest releases are so dark it's unwatchable... Media Player Classic HC is fine for same files. Title 4K HEVC HDR10 Codec HEVC Profile Main 10 Level 150 Resolution 3840x2160 Aspect Ratio 16:9 Interlaced No Framerate 23.976 Bitrate 15 mbps Video Range HDR10 Colour Primaries bt2020 Colour Space bt2020nc Colour Transfer smpte2084 Bit Depth 10 bit Pixel Format yuv420p10le Reference Frames 1
GrimReaper 4739 Posted January 2, 2023 Posted January 2, 2023 8 hours ago, scotty333 said: Bitrate 15 mbps Make sure Tonemapping is enabled in Settings, play item in question and then lower quality to below 15 Mbps (i.e. 10 Mbps, 5 Mbps...) - that will trigger transcoding upon which you can post ffmpeg logs created.
scotty333 0 Posted January 2, 2023 Author Posted January 2, 2023 Thanks that makes sense. Log attached! ffmpeg-transcode-dd9d2f28-3d1b-4fc6-b555-a4a1cdc853e6_1.txt
scotty333 0 Posted January 2, 2023 Author Posted January 2, 2023 Just noticed if I set the bitrate to 5 Mbps the picture is no longer dark? But TV doesn't show it's HDR content... in fact it doesn't show it's HDR when auto bitrate and dark picture either. Whereas other HDR HEVC files do show as HDR and look perfect.
GrimReaper 4739 Posted January 3, 2023 Posted January 3, 2023 6 minutes ago, scotty333 said: Just noticed if I set the bitrate to 5 Mbps the picture is no longer dark? But TV doesn't show it's HDR content... Because it isn't, it's tonemapped SDR. 6 minutes ago, scotty333 said: in fact it doesn't show it's HDR when auto bitrate and dark picture either. Indicating your TV doesn't recognize it's receiving HDR signal from that particular encode. @softworkz
scotty333 0 Posted January 3, 2023 Author Posted January 3, 2023 20 minutes ago, GrimReaper said: Because it isn't, it's tonemapped SDR. Indicating your TV doesn't recognize it's receiving HDR signal from that particular encode. @softworkz Right! Didn't expect as TV supports HDR10+ and HDR24. Thanks for the help!!
rbjtech 5284 Posted January 3, 2023 Posted January 3, 2023 9 hours ago, scotty333 said: Right! Didn't expect as TV supports HDR10+ and HDR24. Thanks for the help!! HDR10+ is fully backwards compatible with HDR10 - it should work with normal HDR just fine ? Emby doesn't actually know any difference - it's just doing a direct passthrough. It should however be listing those titles as 'HDR10' in it's version of 'Media Info'. Is it just the HDR10+ files that have this issue - normal HDR10 files are ok ?
scotty333 0 Posted January 3, 2023 Author Posted January 3, 2023 13 hours ago, rbjtech said: HDR10+ is fully backwards compatible with HDR10 - it should work with normal HDR just fine ? Emby doesn't actually know any difference - it's just doing a direct passthrough. It should however be listing those titles as 'HDR10' in it's version of 'Media Info'. Is it just the HDR10+ files that have this issue - normal HDR10 files are ok ? Yes it does seem to only be HDR10+ that have issues, I've tried a lot of HDR files now. HDR10 files tested all OK.
rbjtech 5284 Posted January 4, 2023 Posted January 4, 2023 17 hours ago, scotty333 said: Yes it does seem to only be HDR10+ that have issues, I've tried a lot of HDR files now. HDR10 files tested all OK. If it's all HDR10+ files, then I think there must be an issue behind the scenes somewhere with your hardware/config on the HDR10+ brightness curve - causing this issue. Not sure how to solve this one - as I don't believe emby is directly involved at this HDR level. Maybe check for new display firmware ?
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