{"action":"opened","issue":{"url":"https://api.github.com/repos/koying/SPMC/issues/444","repository_url":"https://api.github.com/repos/koying/SPMC","labels_url":"https://api.github.com/repos/koying/SPMC/issues/444/labels{/name}","comments_url":"https://api.github.com/repos/koying/SPMC/issues/444/comments","events_url":"https://api.github.com/repos/koying/SPMC/issues/444/events","html_url":"https://github.com/koying/SPMC/issues/444","id":174565278,"number":444,"title":"Smooth Playback, 25fps, 50hz, 4K?","user":{"login":"gazzer82","id":1923535,"avatar_url":"https://avatars.githubusercontent.com/u/1923535?v=3","gravatar_id":"","url":"https://api.github.com/users/gazzer82","html_url":"https://github.com/gazzer82","followers_url":"https://api.github.com/users/gazzer82/followers","following_url":"https://api.github.com/users/gazzer82/following{/other_user}","gists_url":"https://api.github.com/users/gazzer82/gists{/gist_id}","starred_url":"https://api.github.com/users/gazzer82/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/gazzer82/subscriptions","organizations_url":"https://api.github.com/users/gazzer82/orgs","repos_url":"https://api.github.com/users/gazzer82/repos","events_url":"https://api.github.com/users/gazzer82/events{/privacy}","received_events_url":"https://api.github.com/users/gazzer82/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2016-09-01T16:14:07Z","updated_at":"2016-09-01T16:14:07Z","closed_at":null,"body":"I have my Shield tv hooked up to my 4K Panasonic TV running 4K@60hz, all settings are set per the wiki for a 4k display.\r\n\r\nPassthrough is enabled for DD, but not DTS. Refresh rate switching is enabled, and Sync playback to display is turned off.\r\n\r\nAnything that is 29.97/30 plays back smoothly, and i get a correct switch and smooth playback of any 24fps content.\r\n\r\nWhat i cannot get playing smoothly is live or recorded tv at 25fps. I have tvheadend setup and i am viewing uk based DVB-T content, in both HD (1080i) and SD (576i) and i cannot get smooth playback at all, on either recorded or live TV.\r\n\r\nRefresh rate switching does happen, if i start a live channel or recorded programs i can see the TV switching to 4k@50p, but their is a very noticeable judder every second or so, it's very regimented and very easily visible in slow camera moves or vertical/horizontal title rolls. It looks a lot like standard 25fps on a 60hz display judder, but the TV is 100% running at 50hz as indicated by its OSD.\r\n\r\nI have also tried setting the Shield to 4K@50p and as expected their is no switch when watching anything @ 50, but the playback is still not smooth. Though it is a different sort of judder. It's most visible on horizontal title scrolls and looks like every second or so it jumps back several frames for a frame or so, then goes back to the correct place.\r\n\r\nI'm at a bit of a loss as to how to proceed, because neither option gives me an acceptable live or recorded tv picture.\r\n\r\nSo, any pointers, settings, additional troubleshooting options would be greatly appreciated.\r\n\r\nGareth"}}
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