PinoyDVD: The Pinoy Digital Video & Devices Community
High-Def => General HD Discussion => Topic started by: xb24 on Jun 30, 2016 at 05:59 PM
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I have a nvidia shield tv which is capable of playing 4k videos. I don't have a 4k tv yet but I was curious if I would be able play 4k on my 1080p tv. So I downloaded a Elysium 4k sample from here http://4ksamples.com/elysium-2013-2160p-1-minute-sample-footage/ (http://4ksamples.com/elysium-2013-2160p-1-minute-sample-footage/) I was able to play the video just fine but i just want to ask, what am I seeing on my 1080p tv? A "slightly improved 1080p" or basically the same as a 1080p untouched/remux ? Thanks
This the file info:
Format : matroska
Format version : version 4 / version 2
Duration : 1h 49mn
Overall bit rate : 60.5Mbps
Movie name : Elysium 2013
Encoded date : UTC 2016-01-05 22:49:13
Writing application : mkvmerge v8.7.0 ('All of the above') 64bit
Writing library : libebml v1.3.3 + libmatroska v1.4.4
Video
ID : 1
Format : HEVC
Format/info : High Effieciency Video Coding
Codec ID : V_MPEGH/ISO/HEVC
Bit rate : 57.7 Mbps
Width : 3 840 pixels
Height : 1 608 pixels
Display Aspect ratio : 2.40:1
Frame rate mode : Constant
Framerate : 23.976 (24000/1001) fps
Language : English
Default : Yes
Forced : No
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Ang alam ko the tv will downgrade it to 1080p pa din.
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You are watching a sample of the best 1080p can get. But still Full HD resolution.
Which is pretty good enough for most people viewing from a distance.
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Your player may have "downscaled" to 1080p.
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So no slight improvement can be seen? No difference at all?
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So no slight improvement can be seen? No difference at all?
No difference to a Full 1080P video.
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Sir try playing 1080p na lang and see if there's a difference. Test it from 3 different viewing distances.
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Sir try playing 1080p na lang and see if there's a difference. Test it from 3 different viewing distances.
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Oo yun na lang gagawin ko. Testing na lang. hehehe
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the same..
compressed 4k will look worse than and untouched (remux AVC) 1080p..
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the same..
compressed 4k will look worse than and untouched (remux AVC) 1080p..
You may also have a point because may effect din ang processing.
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the same..
compressed 4k will look worse than and untouched (remux AVC) 1080p..
Looking at the bitrate of that 4K file, that may not be true in this case (especially if he is just comparing against BDs). 58 Mbps HEVC video can carry a lot of useful information. The Bluray spec allows for a maximum of 40 Mbps AVC. Most Blurays carry a bitrate about half that due to large audio streams (HD Audio and/or multiple languages).
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Looking at the bitrate of that 4K file, that may not be true in this case (especially if he is just comparing against BDs). 58 Mbps HEVC video can carry a lot of useful information. The Bluray spec allows for a maximum of 40 Mbps AVC. Most Blurays carry a bitrate about half that due to large audio streams (HD Audio and/or multiple languages).
I forgot to mention "may" but as i mentioned, compressed 4k vs untouched 1080p
Or safe to say super compressed 4k.
Since 4k has no proper source, i assume that some 4k is encoded at lower bitrate like in netflix at 12 mbps or even lower to reduce bandwidth on streaming. Baka may mas mababa pa sa mga downloaded.
That's why remastered in 4k bluray (1080p native) looks good in 4k tv
Because it is encoded at maximum bitrate AVC can carry
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You may also have a point because may effect din ang processing.
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Baka lang din yong ibig kong sabihin :)
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