YouTube 1080p

YouTube now features 1080p video streaming!
The bitrate is somehow doubled, so at least it´s not worse then 720p...

BUT: Before YouTube1080p I always uploaded 720p-files that only lost quality due to the reencoding to YouTube720p @ 2Mbit/s
NOW with 1080p files i get weird jaggies and lost detail that´s much worse than the old 720p-format.

I´ve installed Flash 10.1 and ForceWare 195.55 on my GTX275 - both are said to be needed with YouTube1080p.
With Flash 10.1 you get a "video-info" when you right click on the YouTube-player.

It correctly reads 1920x1080, 30fps, 4-5Mbit/s etc. but the FullHD resolution is lost, and weird jagged edges appear (while 720p was not doing that!).
I can see some sort of YouTube-introduced aliasing in both fullscreen AND windowed mode - the aliasing is NOT in the sourcefiles that look great...
Is there some weird processing going on e.g. unnecessary scaling with a horrible scaling process?

Here are some samples:
http://www.youtube.com/watch?v=Hb2o7xdgu4Y
http://www.youtube.com/watch?v=h3ealQ-gshE&
All Files are 1920x1080p30 or p29.97 in MPG4 AVC or MPG (MPEG2) from Sony Vegas Pro 9.0c

Please let me know what you think - or have heard about YouTube 1080p

Best Regards
grooveminister

i yes try and lock good in my explore

Now i´ve downloaded my own test clip with a youtube downloader.
The file is indeed 1920x1080p30 @ around 3,6 Mbit but includes strange scaling artifacts like stairstepping and general loss of detail even in regions of high contrast where the bitrate is not to blame.

Is there any information on this issue anywhere on the net?
The YouTube encoding process seems to introduce errors that look like it´s been scaled using somthing like nearest neighbour - while there shouldn´t be any scaling at all in the 1080p stream version.
The old 720p uploads do not suffer from that issue, they were transcoded 1:1 and are only affected by the bitrate and the single pass encoding.

Ok, as nobody seems to be interested - i´ve kinda solved the mystery myself

First i´ve found some movie trailers that looked pretty good - e.g.:
http://www.youtube.com/watch?v=4N2YWRJ-ppo

Then I did a testupload with a 2.35:1 Version (1920x798p30) of my old testvideo:
http://www.youtube.com/watch?v=5vvd-m6KWRA
This was free of scaling artifacts! - So i proved that anyone can upload "error-free" 1080p if it´s not 1080 lines.

To find out what to do with 16:9 material - I uploaded a 1920x1072p30 file:
http://www.youtube.com/watch?v=MmNTH6Ko-KY&feature=channel

All my test-uploads below 1080 lines went fine - so I thought it might be a MP4-issue (16x16 blocks = 1920x1088).
I dit a test upload using a 1920x1080p30.mpeg2 that went wrong again.

So YouTube currently has a fucked up transcoding software on it´s servers and nobody seems to have noticed.

Nice research. And Yes - sadly or not it really should be a multiply of 16 - so 1072 is good! Thank You!

I tried 2 renders on the same project and uploaded to youtube, one at the 1920x1080 the other at the 1920x1072 and lower bit rate

the 1st one looks better?

the first is
http://www.youtube.com/watch?v=ZmU0s2q8wCc
166 meg file
sony vegas platinum
vimeo preset
sony avc
profile main
entropy cabac
frame rate 29.97 ntsc
field non(progressive scan)
bit rate 10,000,000

second
http://www.youtube.com/watch?v=hiHSZJYf5T0
98 meg file
sony vegas platinum
vimeo preset
sony avc
profile main
entropy cabac
frame rate 29.97 ntsc
field non(progressive scan)
bit rate 10,000,000

I have mixed feelings about this. Do that many people really have 1080p monitors? I have a huge 22 incher here that I love but even it's not quite 1080p.... do we really need to stream web video at resolutions LARGER than the display and downscale for playback?

I have mixed feelings about this. Do that many people really have 1080p monitors? I have a huge 22 incher here that I love but even it's not quite 1080p.... do we really need to stream web video at resolutions LARGER than the display and downscale for playback?

Mine is 1920x1200 on my work computer, but even then I won't be watching 1080p on Youtube, it's an absolute gimic. Just by saying it's 1080p, does not make it better than 720p, yet I'm pretty sure people will watch 1080p at 720p size just because they can

YouTube high definition doesn't look very good at all, instead grooveminister plays "da drum like a mathefucka" !!!

Flash 10.1, isn't it the one that supports GPU acceleration?
If so, the problem might be on your end, rather than Youtube itself.

I, too, noticed same problem when I installed Flash 10.1 BETA. No such problem were there before installing 10.1 BETA.

http://www.youtube.com/watch?v=5f-MYl-HzNw
Check the aboved linked Toy Story trailer. Before using 10.1 version of Flash Player, the letter "PIXAR" was silky smooth. After 10.1, it's all jaggy.