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To enable native AV1 software decode in Plex on Apple TV 4K you have to add your own xml to override on the server side. You need to find the “Application Support/Plex Media Server/Profiles” folder and put the xml file there. Apple TV 4K has a very powerful cpu that can software decode 4K30 HDR AV1, it can also to my surprise decode the Opus audio codec. <?xml version="1.0" encoding="utf-8"?> <Client name="tvOS"> <TranscodeTargets> <VideoProfile container="mkv" codec="h264,h265,hevc,mpeg2video,mpeg4,vc1,av1" audioCodec="flac" subtitleCodec="ass,dvb_subtitle,vobsub,eia_608,pgs,microdvd,movtext,ssa,srt" /> <MusicProfile container="flac" codec="flac" /> <PhotoProfile container="jpeg" /> </TranscodeTargets> <DirectPlayProfiles> <VideoProfile container="mkv,mov,mp4,mpegts,mpeg,mpegvideo,avi,flv,ogg" codec="h264,h265,hevc,vp9,h263,mpeg1video,mpeg2video,mpeg4,vc1,av1" audioCodec="aac,ac3,alac,flac,eac3,dca,opus" subtitleCodec="ass,dvb_subtitle,vobsub,eia_608,pgs,microdvd,movtext,ssa,srt" /> <MusicProfile container="mp3" codec="mp3" /> <MusicProfile container="m4a" codec="aac,alac" /> <MusicProfile container="mp4" codec="aac,he-aac,ac3,eac3,alac" /> <MusicProfile container="flac,mkv" codec="flac" /> <PhotoProfile container="jpeg" /> </DirectPlayProfiles> <CodecProfiles> <VideoCodec name="*"> <Limitations> <UpperBound name="video....

If you want the best quality AV1 encode while keeping as much of the “original” grain as possible, you can opt to use these options at CRF below 20. I have tested these options with my main problem sources, Alien and Alien 3 and it looks very good at preset 4, crf 18. It will look better than x265 at same file sizes. Disabling Temporal Filtering is a must as it messes with the grain too much, you can see this when doing frame by frame seeking....

Woke up this morning, the sun is shining bright, Grab my coffee, ready for the fight, Boot up the system, another day anew, Gonna reinstall Linux, like I always do. Every day, I’m in the fray, Reinstalling Linux in my own way, 365, I’m staying alive, In this code of life, I thrive. Partition my drive, choose my distro with care, From Ubuntu to Fedora, I’ve been everywhere, Terminal’s my playground, code’s my delight, Setting up my environment, through the day and night....