BBC Iplayer UHD

[trevforum]

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@jont-99 wrote:

It's a 4K Sony - 4K on that HDMI input albeit no HDR - that shouldn't stop it showing UHD flag though on BBC and doesn't explain why iPlayer sees the screen as normal HD resolution ?

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If I turn off HDMI HDR on my Panasonic DX902 the UHD flags disappear.  I think all iPlayer UHD content is HLG(HDR) otherwise it reverts to 1080p, however, your puck will upscale to 2160p if set to that resolution.  It seems you'll only get full UHD if your TV can do HLG.

[jont-99]

Bizarre behaviour ! ... so just setup the 2nd puck on my LGC2 - which has HDR/HLG/DV and the UHD icons are showing on the thumbnails on iPlayer - but the screen resolution in iPlayer system settings are still 1920x1080 ? ... guessing the iPayer interface is HD only and the programmes stream in HD/4K as encoded ...

Am also seeing the HDR flag on Sky show details alongside UHD on teh LG - which is correct but frustrating that there's no consistency between platforms in their programme flags !

[trevforum]

Originally Sky adopted HLG as their preferred HDR version as it meant you could, in theory, use the same content file for both UHD HDR and UHD SDR.  However, as is the case, standards are not always standard, so earlier TVs had problems knowing what type of content they were being fed and the single UHD HLG file would look dark on certain TVs.  That's why Sky now offer three formats where available, Ultra HD with HDR, Ultra HD and HD.

iPlayer only offers UHD with HLG (HDR) if your TV reports back via HDMI EDID that it is compatible.