Comments

Former user wrote on 1/3/2014, 6:29 PM
"When in doubt, re-read the thread. Someone is getting 2160. Maybe Youtube checks the connection and automatically cuts back?"

I went back and checked and I'm also seeing the 1440 res for the "Skydive Dubai 2012" video. I had done the screen grab of the 4K res when viewing the "Elysium Trailer." So, I guess the Skydive video isn't available as a 4K playback, they probably just sourced it 4K?

The "Vancouver City 2 Time Lapse in 4K Ultra HD" video is definitely 4K -- it just jumps off the screen.
JohnnyRoy wrote on 1/3/2014, 7:43 PM
I watched Elysium Trailer at 4K using Chrome and it was smooth as silk, no buffering, crystal clear. I have FIOS Internet and Speedtest.net says I'm getting 58.36 Mbps download and 35.80 Mbps upload. :-D

But how can I be watching 4K on my 1920x1200 computer display? Was it still a 4K stream that was re-sized to 1920x1200?

~jr
skeeter123 wrote on 1/3/2014, 8:34 PM
Sweet. (Over 4G tethered phone to laptop.) 1 buffering session. I can live with that..

Now, about their 1080p rubbish....

..

wwjd wrote on 1/3/2014, 8:50 PM
must be type and how much compression is used. I get a solid 16mb download here at home...

Elysium, smooth and no buffering at 2160 (4K)..... BUT, that clp is filled with tons of black areas, and fade to blacks like trailers do, so I suspect it affects the "compression" greatly.

The Dubia Skydive is not 4K so thats out (prob filmed in 4K)

The rest, play, look great, yet buffer and stop repeatedly.
I'm watching on a 1080p monitor but I doubt that affects the downloading where I see the gray bar move, then stop, move and stop.
farss wrote on 1/3/2014, 9:48 PM
I watched one of the 4K videos while keeping an eye on my Network Meter widget.

It reports 18Mbps for a while while the buffer fills then about 0, then after a while back to 18Mbps which can drop down to 15Mbps.

I would estimate you need a [I]sustained[/I] download speed of around 12Mbps to watch YT's 4K without issues.

Bob.
john_dennis wrote on 1/4/2014, 10:10 PM
I started watching the Elysium Trailer "at 4K" on my laptop more than twice with the following result. Oh well!

BlueScreen
OS Version: 6.1.7601.2.1.0.768.3
Locale ID: 1033

Additional information about the problem:
BCCode: 116
BCP1: FFFFFA8003719010
BCP2: FFFFF88002C6FF6C
BCP3: 0000000000000000
BCP4: 0000000000000002
OS Version: 6_1_7601
Service Pack: 1_0
Product: 768_1

I guess to the video adapter, it's like cramming 4K into a 1600x900 bag.