This is how I now process source content. Only Dolby Vision content on ATV4K as LLDV.
Netflix Dolby Vision: ATV4K LLDV.
Netflix HDR10: Not Applicable since all Netflix content on ATV4K is either Dolby Vision or SDR.
Netflix SDR: ATV4K SDR.
Amazon Video Dolby Vision: ATV4K LLDV.
Amazon Video HDR10: SDR BT2020 from Panasonic UB820.
Amazon Video SDR: ATV4K SDR.
Apple TV+ Dolby Vision: ATV4k LLDV.
Apple TV+ HDR10: ATV4K HDR10.
Apple TV+ SDR: ATV4K SDR.
UHD and HD Blu-Ray discs: PC based MadVR.
HBO, Starz, YouTube.tv SDR content: ATV4K SDR.
The LLDV hack has made my ATV4K usable again. I had pretty much stopped using it because of the variable metadata injected when Dolby Vision content was converted to HDR10.
So when Apple TV+ movie is HDR, does the setting match range force it to be “HDR” or does ATV force it to LLDV?
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