topic Re: KD-43XD8305 - 4k @ 2160 ?? in Android TV

KD-43XD8305 - 4k @ 2160 ??

chenks76 — Wed, 10 Jan 2018 18:14:00 GMT

is it possible to get the youtube app to play 4k content at 2160p?
i've played a few tests now and with "stats for nerds" enabled it shows that the current res is 2560x1440@30, it never goes to optimal res of 3840x2160@30.

is it actually possible to play 2160p content anywhere other than direct from a USB stick?

Re: KD-43XD8305 - 4k @ 2160 ??

chenks76 — Thu, 11 Jan 2018 08:00:58 GMT

no-one?

Re: KD-43XD8305 - 4k @ 2160 ??

Kuschelmonschter — Thu, 11 Jan 2018 08:47:56 GMT

If it does not go up to 2160p, it is most likely a bandwidth limitation, either bad Wi-Fi in your home or not enough internet bandwidth from either your ISP or the YouTube server.

Re: KD-43XD8305 - 4k @ 2160 ??

chenks76 — Thu, 11 Jan 2018 08:51:45 GMT

so it restricts on bandwidth even though the youtube website has no problems with 2160p?

tv is connected via ethernet and the "stats for nerds" showed a 14Mbps

Re: KD-43XD8305 - 4k @ 2160 ??

Kuschelmonschter — Thu, 11 Jan 2018 08:55:02 GMT

YouTube 4K streams are mostly quite big. 14mbps might not be enough. Try power cycling your TV. Networking on Sony is quite poor (due to flaky MediaTek) and can get stuck sometimes. Total reboot can help.

Re: KD-43XD8305 - 4k @ 2160 ??

chenks76 — Thu, 11 Jan 2018 09:03:26 GMT

network isn't an issue as i can stream 4k content to it from my plex server.

i'd be surprised if any youtube content exceeded a bitrate of 14Mbps, happy to be proven wrong though.

Re: KD-43XD8305 - 4k @ 2160 ??

Kuschelmonschter — Thu, 11 Jan 2018 09:09:54 GMT

chenks76 schrieb:
i'd be surprised if any youtube content exceeded a bitrate of 14Mbps, happy to be proven wrong though.

Check out The World in HDR:

313 webm 3840x2160 2160p 21981k, vp9, 30fps, video only, 314.00MiB
315 webm 3840x2160 2160p60 29805k, vp9, 60fps, video only, 457.80MiB

Re: KD-43XD8305 - 4k @ 2160 ??

chenks76 — Thu, 11 Jan 2018 09:21:01 GMT

is my TV even capable of HDR though?

too many variants of 4K floating about it's hard to keep track of what the TV is capable of.

there's 4K, and HDR, and 10bit, and HLG and god knows what else.

Re: KD-43XD8305 - 4k @ 2160 ??

Kuschelmonschter — Thu, 11 Jan 2018 09:22:17 GMT

Sony still can't do HDR for YouTube (VP9.2). But it plays the 4K SDR (VP9) streams.

Re: KD-43XD8305 - 4k @ 2160 ??

chenks76 — Thu, 11 Jan 2018 09:28:48 GMT

what is my TV capable of though, in terms of the panel?

it's an KD-43XD8305

Re: KD-43XD8305 - 4k @ 2160 ??

Kuschelmonschter — Thu, 11 Jan 2018 09:40:09 GMT

In terms of panel it can't really reproduce HDR due to limited dynamic range (IPS display, no local dimming), but it can still play several HDR formats. The processor can handle HEVC and VP9/VP9.2 video and HDR10 and HLG metadata formats. So it is in theory capable of playing YouTube HDR streams. Due to software/driver limitation, it currently can't do VP9.2 which is required for YouTube HDR. But it can still play the 4K streams on YouTube, also The World in HDR which is available in...

4K SDR:

313 webm 3840x2160 2160p 21981k, vp9, 30fps, video only, 314.00MiB
315 webm 3840x2160 2160p60 29805k, vp9, 60fps, video only, 457.80MiB

4K HDR:

337 webm 3840x2160 2160p60 HDR 21696k , vp9.2, 60fps, video only, 339.06MiB

And before you ask... yes, HDR streams might be of less bandwidth due to better compressibility of 10-bit.

Re: KD-43XD8305 - 4k @ 2160 ??

LightFoot — Thu, 11 Jan 2018 11:04:44 GMT

@chenks76 wrote:
so it restricts on bandwidth even though the youtube website has no problems with 2160p?
tv is connected via ethernet and the "stats for nerds" showed a 14Mbps

Hi @chenks76. Looking at the YouTube own Help page it suggests you need 20,000–51,000 Kbps for 2160p 60fps. https://support.google.com/youtube/answer/2853702?hl=en-GB

Re: KD-43XD8305 - 4k @ 2160 ??

Jecht_Sin — Fri, 12 Jan 2018 07:23:46 GMT

@chenks76 wrote:
network isn't an issue as i can stream 4k content to it from my plex server.

Plex is streaming locally, so the bottleneck is the max bandwidth of the channel used (Ethernet/WiFi) and that's 100Mbps. YouTube, Netflix, etc. use your Internet connection and if you have (let's say) 15Mbps that isn't enough for all 4K content available.

As it has been said already YouTube can go up to 20-21Mbps, and when the estimated bandwidth is just enough it usually reduces the resolution (quite heavily I must say). Netflix instead can still stream 4K content at lower bitrates (like 8-9Mbps) for example.