Max. resolution -> unlimited?

[MrTroy]

Are there plans to remove the maximum resolution barrier for DivX encodes? (or is it already possible to encode large videos, and I missed it?)

A few days ago I wanted to encode a 2560x1440 video (I must admit, that's a bit high...), but to my surprise DivX told me videos can have a max. resolution of 1920x1080, even in unconstrained profile. I think that's rather strange; MPEG-2, XviD, and even the obsolete Cinepak don't have maximum resolution barriers.

[Isochroma]

Damn... you're right! Looks like I'll have to use XviD for those QuadHDTV encodes I'm planning! (for the CMO/Westinghouse QHD LCD (https://www.westinghousedigital.com/t-Press_Release_56inchLCD-01-05-06.aspx) about to enter mass production)

[Leica]

MPEG-2, XviD, and even the obsolete Cinepak don't have maximum resolution barriers.

Are you sure MPEG-2 allows more than 1920x1080? I tried and failed.

So do you have the Dell 30 inch??? ;)

[Isochroma]

WMV3 definitely has very high maximum resolution, far beyond 2048x1536. So perhaps even WMV1/2 do to...

[MrTroy]

Are you sure MPEG-2 allows more than 1920x1080? I tried and failed.That's an encoder limitation then, not a codec limit. With encoders like FreeEnc, QuEnc, HCEnc I succesfully encoded 1440p video.

[Leica]

That's an encoder limitation then, not a codec limit. With encoders like FreeEnc, QuEnc, HCEnc I succesfully encoded 1440p video.

Thanks for the info. I tried TMPEnc and it failed to encode past 1920x1080 and so I assumed that was the limit of MPEG-2.

When you encode 1440p, do you encode at 59.94 progessive frames per second? What bit rate?

[MrTroy]

Thanks for the info. I tried TMPEnc and it failed to encode past 1920x1080 and so I assumed that was the limit of MPEG-2.

When you encode 1440p, do you encode at 59.94 progessive frames per second? What bit rate?
1440p @ 24fps @ 30.000 kbps :)

[Leica]

<<PAL FACTS 20% more horizontal scan lines than NTSC - No telecine judder >>

Off topic, but with PAL:-

1) Movies are played 4% faster! Voices become higher pitched too!

2) For sports and other videos, the frame rates is 20% slower - 50 fields per second for PAL, 59.94 for NTSC.

3) Computer monitors refresh at 60Hz. Only old and obsolete non-LCD monitors can refresh at other rates. So playing PAL stuff on a 60Hz results in nast judder. NTSC stuff is silky smooth.

4) For HDTV (both 720p and 1080i) the vertical resolution advantage is gone, BUT the 3 disadvantages above remain!

[SeeMoreDigital]

I'm confused....

Why would anybody want to up-scale and generate encodes with a resolution of more than 1920x1080/88 pixels?

If you keep to the maximum of 1920x1080/88 pixels, at least you'll be able to find a industry standard hardware devices that can play them and display them!

[MrTroy]

3) Computer monitors refresh at 60Hz. Only old and obsolete non-LCD monitors can refresh at other rates. So playing PAL stuff on a 60Hz results in nast judder. NTSC stuff is silky smooth.
For the PAL discussion I refer you to the numerous other threads about this subject. However, I will comment on your point 3:
That's utter nonsense. All computer monitors, including the newest LCDs, can be set to other rates than 60Hz. In fact, the LCD I'm looking at now is set at 100Hz - silky smooth PAL playback.

In fact, PAL@100Hz is smoother than NTSC@60Hz, because of the lack of telecine judder. NTSC film will never look entirely smooth.

Now let's get back ontopic.
I'm confused....

Why would anybody want to up-scale and generate encodes with a resolution of more than 1920x1080/88 pixels?Who talked about upscaling? I'm talking about native 1440p stuff.

[SeeMoreDigital]

Now let's get back ontopic.
Who talked about upscaling? I'm talking about native 1440p stuff.Native 1440p from where?

[MrTroy]

Native 1440p from where?I have a demo disc here, called "Extreme Definition trailers". Got it at a technology event. It contains some movie trailers in the 1440p "Extreme Definition" (XD) format. It's supposed to be the successor to HD.

[SeeMoreDigital]

I have a demo disc here, called "Extreme Definition trailers". Got it at a technology event. It contains some movie trailers in the 1440p "Extreme Definition" (XD) format. It's supposed to be the successor to HD.So you're saying the "1440" relates to number of height pixels and not the number of width pixels?

[jggimi]

This is an interesting discussion, but has morphed quickly away from DivX, and into general HD formats/encodings. I'm moving this to our HD forum, where there are probably some members who would enjoy reading and contributing.

[MrTroy]

So you're saying the "1440" relates to number of height pixels and not the number of width pixels?Yes. The resolution is 2560x1440.

[Golgot13]

H264 Ateme encoder can do this resolution format with Level 5.

At Level 4 the resolution is up to 2048x1024 30fps.
At Level 4.2 the resolution is up to 2048x1088 30fps.
At Level 5 the resolution is up to 2560x1920 30fps.
At Level 5.1 the resolution is up to 4096x2048 30fps.

And Nero make a demo at this last resolution (8k) at CES2006
http://www.nero.com/enu/PR_2006_01_06.html (mistake: resolution
was 4096x2048)


Golgot13

[MrTroy]

The problem is, however, that for playing a 1440p h264 you would need a pc that hasn't been invented yet.

[Golgot13]

The problem is, however, that for playing a 1440p h264 you would need a pc that hasn't been invented yet.

No, NHK make a demo of UHDV ( Ultra-High Definition= 7680×4320 )
at last NAB2006 with a specific hardware.


It possible to play video in resolution 4k with HP xw9300
(with two last CPU from AMD), a specific card from NVidia
with DVI dual link and the Dell monitor UltraSharp 3007WFP
(2560x1600) .


Golgot13

[*.mp4 guy]

The problem is, however, that for playing a 1440p h264 you would need a pc that hasn't been invented yet.I can play back 1920*1080*29.97 HD with a single core 3800+ (venice core) and an old radeon 9600 pro without any droped frames, with a modern 256MB graphics card and a reasonably good dualcore it would be quite easy to decode 2560*1440*(anything less then 30).

[Isochroma]

But we need to decode and of course display QuadHDTV for the upcoming mass-produced Westinghouse QHD LCD. Ok, it's not so important that the source video be QHD, even Std. 1080p will look really nice upscaled to QHD. However, NVidia's hardware-level spanning driver must be updated to support these tiling configurations:

1920x2160x2: Left-Right spanned
3840x1080x2: Top-Bottom spanned

In order to obtain the full 3840x2160. Panel will take two dual-link DVI connections. Software spanning via Windows multiple display option won't work for video playback (fullscreen only renders on one display). Even hardware spanning has sketchy overlay support, so you can forget that - only VMR modes should be considered for such interesting projects anyway. You could stretch the window (maximize) but then there would be ugly window borders, title and menu bars, so this does not qualify as an option.

At present the NVidia driver doesn't support the above spanning modes.

[jmac698]

I would try contacting Nvidia at a business level, and ask if they want to copresent this product introduction, it's a chance to show off what their cards can do... in other words, they will see if it can be programmed easily relative to the opportunity.
Don't forget Matrox, they may have more advanced multidisplay.

[christopherw]

The problem is, however, that for playing a 1440p h264 you would need a pc that hasn't been invented yet.


Rubbish, I have a Narnia 1440p trailer encoded in XviD (yes, urgh), and it plays back fine on my PC (Sempron 3000 @ stock speed of 1.8GHz w/ ATI X1600XT). I'm sure CoreAVC would manage it alright, given that I can play back 1080i and 1080p H264 realtime at around 60% CPU peak (including AC3 audio decoding).


So nur. :P Granted, at 100% scale it goes off my screen about three times over, but it still looks lovely downscaled ;) Must find a 1440p projector now...

[the_fry]

Maybe nobody is interested in this anymore... but using ffdshow you can encode MPEG-2 from almost any application in very high resolutions.
Just used this to get After Effects to encode my QHD movies in MPEG-2 ;)

[bestsoft666]

For sports and other videos, the frame rates is 20% slower - 50 fields per second for PAL, 59.94 for NTSC.